КАТАЛИЗАТОРЫ ОБРАБОТКИ НЕСТАЦИОНАРНЫХ ВЫБРОСОВ NO

Изобретение относится к композиции катализатора для обработки выхлопного газа. Данная композиция включает a) первое молекулярное сито, имеющее предварительно состаренную решетку ВЕА или решетку ВЕА с изоморфным железом, в котором указанное первое молекулярное сито содержит от 0,5 до 5 весовых процентов, полученного ионным обменом или свободного железа; и b) второе молекулярное сито, имеющее кристаллическую структуру с малыми порами и содержащее от 0,5 до 5 весовых процентов полученной ионным обменом или свободной Cu. При этом отношение указанного первого молекулярного сита и указанного второго молекулярного сита составляет от 0,1 до 1. Предлагаемая композиция катализатора характеризуется более высокой общей конверсией NOпри равном или более низком проскоке NH, чем любой молекулярно-ситовой компонент, взятый отдельно. Настоящее изобретение относится также к катализатору для обработки выхлопного газа, включающему данную композицию, и способу обработки выхлопного газа. 3 н. и 11 з.п. ф-лы, ...

КАТАЛИТИЧЕСКИЙ ФИЛЬТР С ПРОТОЧНЫМИ СТЕНКАМИ С КАТАЛИЗАТОРОМ НЕЙТРАЛИЗАЦИИ ПРОСКОКА АММИАКА

Изобретение предназначено для очистки выхлопных газов. Каталитический монолитный фильтр с проточными стенками для использования в системе очистки выхлопов имеет первую торцевую поверхность, вторую торцевую поверхность, длину фильтра, определяемую расстоянием от первой торцевой поверхности до второй торцевой поверхности, продольное направление между первой торцевой поверхностью и второй торцевой поверхностью и первое и второе множества каналов, простирающихся в продольном направлении. Первое множество каналов открыто на первой торцевой поверхности и закрыто на второй торцевой поверхности, а второе множество каналов открыто на второй торцевой поверхности и закрыто на первой торцевой поверхности. Монолитный фильтр содержит пористый субстрат, имеющий поверхности, которые образуют каналы, и имеющий первую зону, простирающуюся в продольном направлении от первой торцевой поверхности ко второй торцевой поверхности на расстояние, меньшее длины фильтра, и вторую зону, простирающуюся в продольном ...

КОНСТРУКЦИЯ СОТОВОГО ЭЛЕМЕНТА С НЕСУЩИМИ УЧАСТКАМИ (ВАРИАНТЫ)

Изобретение может быть использовано в системах нейтрализации отработавших газов автотракторных средств. Конструкция сотового элемента содержит металлический кожух, в котором размещен собственно сотовый элемент, который имеет множество отделенных друг от друга перегородками каналов и радиальная жесткость которого неоднородна в его окружном направлении (U), а также имеется компенсационный слой, который расположен между кожухом и сотовым элементом по меньшей мере на отдельных участках в окружном направлении (U), при этом указанный компенсационный слой имеет в окружном направлении (U) сотового элемента по меньшей мере два несущих участка, которые воздействуют на сотовый элемент в радиальном направлении (R) с большими усилиями, чем действующие вне этих несущих участков усилия на остальных расположенных в окружном направлении участках, причем упомянутые несущие участки расположены в тех местах сотового элемента, где последний обладает повышенной радиальной жесткостью. Такие несущие участки могут ...

ВЫХЛОПНАЯ СИСТЕМА С КАТАЛИЗАТОРОМ РЕФОРМИНГА

Изобретение относится к выхлопной системе, предназначенной для обработки выхлопного газа двигателя внутреннего сгорания. Выхлопная система включает тройной катализатор (TWC – three-way catalyst), катализатор реформинга топлива, расположенный по потоку после TWC, и устройство подачи топлива, расположенное по потоку до катализатора реформинга топлива, при этом первую часть выхлопного газа направляют в обход TWC и приводят в контакт с катализатором реформинга топлива в присутствии топлива, добавляемого из устройства подачи топлива, с образованием потока газообразных продуктов реформинга, а вторую часть выхлопного газа приводят в контакт с TWC и используют для нагревания катализатора реформинга топлива, после чего сбрасывают в атмосферу, и при этом поток газообразных продуктов реформинга рециркулируют в систему впуска двигателя. Изобретение обеспечивает улучшение теплообмена и максимальное снятие тепла выхлопного газа с целью улучшения каталитического реформинга. 7 з.п. ф-лы, 2 ил., 4 табл.

ПОДЛОЖКА ФИЛЬТРА, СОДЕРЖАЩАЯ ЗОНАЛЬНО НАНЕСЕННОЕ ПОКРЫТИЕ ИЗ ПОРИСТОГО ОКСИДА С КАТАЛИЗАТОРОМ

Изобретение относится к каталитическому фильтру, предназначенному для отфильтровывания твердых частиц из отработавшего газа, выпускаемого из двигателя внутреннего сгорания с принудительным воспламенением топлива, а также системе выпуска отработавших газов, содержащей такой фильтр, и способу одновременной конверсии оксидов азота и твердых частиц. Фильтр содержит керамическую пористую подложку с проходящим через стенки потоком, имеющую общую длину и впускные каналы, частично ограниченные входными поверхностями керамических стенок, и выпускные каналы, частично ограниченные выходными поверхностями керамических стенок, при этом входные поверхности отделены от выходных поверхностей первой пористой структурой, содержащей поры с первым средним размером пор, причем пористая подложка частично покрыта композицией для покрытия из пористого оксида с катализатором, при этом вторая пористая структура имеющей покрытие из пористого оксида части пористой подложки содержит поры со вторым средним размером ...

КАТАЛИЗАТОР ОТРАБОТАВШИХ ГАЗОВ

Изобретение относится к катализатору для очистки отработавших газов, выпускаемых из двигателя внутреннего сгорания. Катализатор включает основной материал со множеством внутренних поверхностей стенок, сформированных множеством сквозных отверстий. Каждое из сквозных отверстий имеет центральную ось. Отверстия проходят сквозь основной материал от первой торцевой поверхности ко второй торцевой поверхности. На множестве внутренних поверхностей стенок сформировано множество каталитических слоев. Каждый из каталитических слоев подразделяется на первую область, пролегающую от первой торцевой поверхности ко второй торцевой поверхности на заданное расстояние, вторую область, пролегающую от второй торцевой поверхности к первой торцевой поверхности на заданное расстояние и третью область, расположенную между первой и второй областями. Каталитический слой сформирован таким образом, что расстояние (h1) от центральной оси сквозного отверстия до внутренней поверхности каталитического слоя в первой области ...

УСТРОЙСТВО ДЛЯ УМЕНЬШЕНИЯ КОЛИЧЕСТВА ВЫБРАСЫВАЕМЫХ ЧАСТИЦ САЖИ ДЛЯ ТЕПЛОВЫХ ДВИГАТЕЛЕЙ

Изобретение относится к устройствам для уменьшения количества выбрасываемых частиц сажи из системы отработавших газов теплового двигателя. За счет добавки в топливо каталитической присадки точка воспламенения частиц сажи при их дожигании снижается примерно до 300 - 350°С, так что нормальная работа емкости значительно снижена, вследствие чего процесс регенерации фильтра в емкости начинается сравнительно рано. В соответствии с изобретением фильтрующий материал состоит из множества свернутых в кольцо плетеных рукавов из тончайших керамических нитей, вдоль которых пропущена термостойкая проволока. Проволока проходит через каждую отдельную петлю плетеной структуры параллельно керамической нити. Конструкция согласно изобретению обеспечивает удовлетворяющий требованиям срок службы сажевого фильтра, который выдерживает вибрационные и механические нагрузки. 15 з.п.ф-лы, 7 ил.

БЛИЗКО РАЗМЕЩЕННАЯ СИСТЕМА SCR

... 1. Система для обработки выхлопных газов, содержащих NO, из двигателя, упомянутая система, содержащая:проточный монолит, имеющий первый каталитический состав для селективного каталитического восстановления NOи имеющий первый объем;близко размещенный фильтр твердых частиц, имеющий второй каталитический состав для снижения количества твердых частиц и селективного каталитического восстановления NO, и имеющий второй объем; иотношение объемов первого объема ко второму объему составляет менее чем приблизительно 1:2,в которой упомянутый проточный монолит находится в жидкостном соединении с упомянутым фильтром твердых частиц и встроен выше по потоку от него.2. Система по п. 1, в которой соотношение объемов составляет от приблизительно 1:10 до приблизительно 1:2.3. Система по п. 1, в которой соотношение объемов составляет от приблизительно 1:6 до приблизительно 1:4.4. Система по п. 1, в которой упомянутый проточный монолит является экструдированным каталитическим кирпичом.5. Система по п. 4, в которой ...

ИНТЕГРИРОВАННЫЙ КАТАЛИЗАТОР SCR И LNT ДЛЯ УМЕНЬШЕНИЯ NOX

ФИЛЬТР ДЛЯ ОЧИСТКИ ВЫХЛОПНОГО ГАЗА

ОКИСЛИТЕЛЬНЫЙ КАТАЛИЗАТОР И СИСТЕМА ВЫПУСКА ВЫХЛОПНЫХ ГАЗОВ ДЛЯ ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

КАТАЛИЗАТОР СКВ, ДОПУСКАЮЩИЙ ПЕРЕДОЗИРОВКУ NH3

УЛОВИТЕЛЬ УГЛЕВОДОРОДОВ

ФИЛЬТР ДЛЯ ФИЛЬТРОВАНИЯ ВЕЩЕСТВА В ВИДЕ ЧАСТИЦ ИЗ ВЫХЛОПНЫХ ГАЗОВ, ВЫПУСКАЕМЫХ ИЗ ДВИГАТЕЛЯ С ПРИНУДИТЕЛЬНЫМ ЗАЖИГАНИЕМ

... 1. Фильтр для фильтрования вещества в виде частиц (ВВЧ) из выхлопных газов, выпускаемых из двигателя с принудительным зажиганием, который содержит пористую подложку, имеющую впускные поверхности и выпускные поверхности, при этом впускные поверхности отделены от выпускных поверхностей пористой структурой, содержащей поры первого среднего размера, причем пористая структура покрыта покрытием, содержащим множество твердых частиц, причем пористая структура пористой подложки с покрытием содержит поры второго среднего размера, и поры второго среднего размера меньше пор первого среднего размера.2. Фильтр по п.1, в котором первый средний размер пор пористой структуры пористой подложки составляет от 8 до 45 мкм.3. Фильтр по п.1, в котором количество покрытия составляет >0,50 г/дюйм.4. Фильтр по п.3, в котором количество покрытия составляет >1,00 г/дюйм.5. Фильтр по пп.1, 2, 3 или 4, содержащий поверхностное покрытие, при этом слой покрытия, по существу, покрывает поверхностные поры пористой структуры ...

СЕЛЕКТИВНОЕ КАТАЛИТИЧЕСКОЕ ВОССТАНОВЛЕНИЕ (SCR) С ИСПОЛЬЗОВАНИЕМ ТУРБОНАГНЕТАТЕЛЯ И СИСТЕМЫ С СОЕДИНЕННЫМИ ВПЛОТНУЮ ASC/DOC

КАТАЛИТИЧЕСКИЙ ФИЛЬТР С ПРОТОЧНЫМИ СТЕНКАМИ, СНАБЖЕННЫЙ МЕМБРАНОЙ

Filter für Motorabgase

Entfernung von Stickstoffoxiden aus Abgas unter Verwendung eines Katalysators

Verfahren zur Behandlung von Stickstoffoxide enthaltendem Abgas zur Entfernung von Stickstoffoxiden aus einem Gasfluß durch Verwendung eines Katalysators, wobei die Stickstoffoxide zu Stickstoff reduziert werden durch Kontaktieren des Gasflusses mit dem Katalysator in Gegenwart von mindestens einem von Kohlenwasserstoffen und Kohlenmonoxid, wobei der Katalysator eine Struktur aufweist, die zusammengesetzt ist aus einem anorganischen Oxidträger, der aktive Komponenten trägt, wobei die aktiven Komponenten mindestens ein Edelmetall umfassen, ausgewählt aus Rhodium,Platinund Palladium, mindestens ein Seltene Erdenmetall, mindestens ein Erdalkalimetall und Magnesium, wobei das Edelmetall enthalten ist in einem Bereich von 0,05-3,5mol-% pro 100 mol-% des anorganischen Oxidträgers, das Seltene Erdenmetall enthalten ist in einem Bereich von 0,7-20mol-% pro 100 mol-% des anorganischen Oxidträgers, das Erdalkalimetall enthalten ist in einem Bereich von 4-16mol-% pro 100 mol-% des anorganischen Oxidträgers ...

RAUCHGASFILTER MIT EINEM HEIZELEMENT, DAS IN EINEM AXIALEN ZWISCHENRAUM VON ZWEI FILTERSEGMENTEN ANGEBRACHT IST

VORRICHTUNG UND VERFAHREN ZUM ENTFERNEN VON RUSSPARTIKELN AUS ABGASEN VON VERBRENNUNGSPROZESSEN

Partikelfilter für eine Verbrennungskraftmaschine

Die Erfindung betrifft einen Partikelfilter (10) für eine Verbrennungskraftmaschine, umfassend einen aus Filtermaterial gebildeten Filterkörper (18), welcher eine Vielzahl an Partikelfilterkanälen (22) aufweist, wobei eine Größe der Partikelfilterkanäle (22) zwecks Dämpfung von akustischen Wellen unterschiedlich ist.

Partikelfilter mit selbstselektiver Regeneration

Vorrichtung zur Abgasnachbehandlung

Die Erfindung betrifft eine Vorrichtung zur Behandlung von Abgasen eines Verbrennungsmotors, mit einer in einem Gehäuse (1) angeordneten Heizscheibe (2) und mit einem der Heizscheibe (2) in Strömungsrichtung nachgelagerten in dem Gehäuse (1) angeordnetem Hauptkatalysator (3, 13), wobei die Heizscheibe (2) und der Hauptkatalysator (3, 13) entlang der Strömungsrichtung entlang mehrerer Strömungskanäle durchströmbar sind, wobei die Heizscheibe (2) durch einen metallischen Wabenkörper gebildet ist und der Hauptkatalysator (3, 13) aus einem keramischen Wabenkörper gebildet ist, der mittels eines Fixiermittels (6) gegenüber dem Gehäuse (1) fixiert ist, wobei die Heizscheibe (2) mittels einer elektrischen Durchführung (4), welche durch das Gehäuse (1) von außen nach innen geführt ist, elektrisch kontaktiert ist.

Vorrichtung zur katalytischen Reinigung von Verbrennungsmotor-Abgasen

Abgasfilter.

PORÖSE KERAMISCHE FORMEN, ZUSAMMENSETZUNGEN ZUR HERSTELLUNG UND VERFAHREN ZUR HERSTELLUNG.

Verfahren und Vorrichtung zur Reinigung von Abgas

Verfahren und System zur Bestimmung von Ruß- und Aschekonzentrationen in einem Filter

Ein System (1) zur Bestimmung der Ruß- und/oder Aschelast innerhalb eines Filters (16), umfassend: Eine Sendeantenne (20), welche dazu dient, einen Bereich von Radiofrequenzen über das Filter (16) zu übertragen; eine Empfangsantenne (22), welche dazu dient, einen Bereich an Radiofrequenzen über das Filter (16) zu empfangen; einen ersten Detektor (30), welcher dazu dient, ein Referenzsignal (48) zu empfangen und zu senden; ein zweiter Detektor (36), welcher dazu dient, ein Empfangssignal (46) zu empfangen und zu senden; ein dritter Detektor (32), welcher dazu dient, ein Sendesignal (44) zu empfangen und zu senden; ein erster Komparator (34), welcher dazu dient, das Referenzsignal (48) mit dem Empfangssignal (46) zu vergleichen; und ein zweiter Komparator (37), welcher dazu dient, das Referenzsignal (48) mit dem Sendesignal (44) zu vergleichen.

Verfahren zur Herstellung eines aus einem geformten, katalytisch inerten, undurchlaessigen, mit einer Metalloxydschicht ueberzogenen Traeger bestehenden Katalysators

Keramikfilter zur Abgasreinigung

BEI HOHEN TEMPERATUREN BESTAENDIGE KATALYSATOR-FORMKOERPER UND VERFAHREN ZU DEREN HERSTELLUNG

HERSTELLUNGSVERFAHREN EINES WABENFILTERS ZUR REINIGUNG VON ABGAS

VERBESSERTE KOMPAKTE VAKUUMISOLATION

AUSPUFFANLAGE FUER VERBRENNUNGSMOTOREN

VORRICHTUNG ZUR AUSFUEHRUNG EINES VERFAHRENS ZUR HERSTELLUNG EINER KATALYTISCH WIRKENDEN EINRICHTUNG FUER EIN ABGASSYSTEM EINER VERBRENNUNGSKRAFTMASCHINE

Exhaust gas catalyst of any shape

An exhaust gas catalyst is adapted to any desired catalyst chamber shape, is shaped at the inlet side such that the flow area of the annular cross-section between the outer housing and the catalyst is maintained roughly constant, has a finely porous cover layer of thickness decreasing from the middle to the inlet and outlet sides and has an internal coarsely porous and coarsely structured form. The active material of the catalyst is a mixt. of 0.1-1 g/l. platinum and 1-10 g/l. lanthanum cobaltite.

I.c. engine exhaust gas temperature increasing device uses selectively closed throttle valve downstream of exhaust catalyser with simultaneous increase in quantity of fuel injected into engine

The exhaust gas temperature increasing device uses an exhaust throttle valve (49) inserted in the exhaust gas line (45,47), which is moved into a fully closed position by a valve control device, with simultaneous control of the main fuel injection device for the engine (1), for increasing the quantity of fuel injected by the fuel injection valves (32), for heating an emission control catalyser (46) inserted in the exhaust line upstream of the throttle valve to its required working temperature.. An Independent claim for an i.c. engine exhaust gas temperature increasing method is also included.

ELASTISCHE HALTERUNG FUER KERAMISCHE MONOLITHISCHE KATALYSATORKOERPER

Abgasreinigungsvorrichtung

Montagevorrichtung einer Matte auf einem keramischen Katalysatorträger

Verschlossene Wabenstruktur

Es ist eine verschlossene Wabenstruktur vorgesehen, bei der im Querschnitt eines Wabenstrukturkörpers senkrecht zur Verlaufsrichtung der Zellen 2 Zulaufzellen 2a so angeordnet sind, dass sie eine Ablaufzelle 2b umgeben, und die Anzahl der Zulaufzellen 2a größer ist als die Anzahl der Ablaufzellen 2b, und der Querschnitt mehrere Überschneidungsabschnitte 4 der Trennwände 1 aufweist, die jeweils die nebeneinanderliegenden Zulaufzellen 2a definieren, und bei 60% oder mehr der Gesamtanzahl der Überschneidungsabschnitte 4 eine Beziehung zwischen dem Durchmesser (D1) eines Kreises, eingeschrieben in den Überschneidungsabschnitt 4, und dem Durchmesser (D0) eines Kreises, eingeschrieben in die Trennwand 1, die die Zulaufzelle 2a und die Ablaufzelle 2b definiert, die nebeneinander liegen, D1/(√2 × D0) = 1,20 bis 1,80 erfüllt.

VERFAHREN ZUR ENTFERNUNG VON BLEI AUS DEM ABGAS VON OTTOMOTOREN

KATALYTISCHER WANDSTROMFILTER, DER EINE MEMBRAN AUFWEIST

Die vorliegende Erfindung betrifft einen katalytischen Wandstrom-Monolith zur Verwendung in einem Emissionsbehandlungssystem, wobei der Monolith ein poröses Substrat umfasst und eine erste Fläche und eine zweite Fläche, die eine Längsrichtung dazwischen definieren, und eine erste und eine zweite Vielzahl von Kanälen, die sich in der Längsrichtung erstrecken, aufweist, wobei die erste Vielzahl von Kanälen eine erste Vielzahl von inneren Oberflächen liefert und an der ersten Fläche offen und an der zweiten Fläche geschlossen ist, und wobei die zweite Vielzahl von Kanälen an der zweiten Fläche offen und an der ersten Fläche geschlossen ist, wobei ein erstes katalytisches Material in dem porösen Substrat verteilt ist, wobei eine mikroporöse Membran in der ersten Vielzahl von Kanälen auf einem sich in Längsrichtung erstreckenden ersten Bereich der ersten Vielzahl von inneren Oberflächen bereitgestellt ist, und wobei der erste Bereich sich von der ersten Fläche über 75 % bis 95 % einer Länge ...

Abgasnachbehandlungseinrichtung, Abgasnachbehandlungssystem, Brennkraftmaschine und Kraftfahrzeug

Die Erfindung betrifft eine Abgasnachbehandlungseinrichtung (1) mit einem Gehäuse (3), in dem wenigstens zwei Abgasnachbehandlungselemente (5, 7) angeordnet sind. Dabei ist vorgesehen, dass ein erstes Gehäuseteil (13), in dem ein erstes Abgasnachbehandlungselement (5) angeordnet ist, in einem zweiten Gehäuseteil (15), in dem ein zweites Abgasnachbehandlungselement (7) angeordnet ist, bereichsweise aufgenommen und geführt ist.

KATALYTISCHER KONVERTER ZUR VERWENDUNG BEI AUSPUFF- ODER ABGASSYSTEMEN VON VERBRENNUNGSKRAFTMASCHINEN

Partikelfilter sowie Verfahren zur Herstellung eines solchen Partikelfilters

Die Erfindung betrifft einen Partikelfilter (60) zur Anordnung in einer Abgasanlage (20) eines Verbrennungsmotors (10), wobei der Partikelfilter (60) eine integrierte Funktion zur selektiven, katalytischen Reduktion von Stickoxiden aufweist. Dabei sind an dem Partikelfilter (60) eine Mehrzahl von Einlasskanälen (82) und eine Mehrzahl von Auslasskanälen (84) ausgebildet, welche jeweils durch eine poröse Filterwand (86) voneinander getrennt sind, wobei die Einlasskanäle (82) auslassseitig verschlossen sind und die Auslasskanäle (84) einlassseitig verschlossen sind, derart, dass der Abgasstrom des Verbrennungsmotors (10) durch die poröse Filterwand (86) geführt wird. Der Filterkörper (90) des Partikelfilters (60) ist als Vollextrudat aus einem Filtermaterial (88) mit einer katalytischen Wirkung bezüglich der selektiven, katalytischen Reduktion von Stickoxiden hergestellt.Die Erfindung betrifft ferner ein Verfahren zur Herstellung eines solchen Partikelfilters (60) sowie ein Abgasnachbehandlungssystem ...

Catalytic heat exchanger

A catalytic heat exchanger for the exhaust emission control of internal combustion engines is described, which is constructed in the form of a cross-flow heat exchanger. The exhaust gases to be purified are lead through a group of flow passages coated with a catalyst, whilst the fluid cooling medium is lead through a second group of flow passages running transversely to the first group. The separate groups of passages are arranged in alternating layers in the heat exchanger. The flow passages for the fluid heat exchange medium (air) may be provided with electrical heating elements. The short heat transmission or dissipation distances which can be achieved are especially advantageous.

Exhaust emission control device

The invention relates to an exhaust emission control device for internal combustion engines operated with leaded and/or unleaded fuel. Since in the current situation a transitional phase is to be anticipated in the case of motor vehicles, in which both leaded and unleaded fuel is used, this means a considerable shortening of the service life of conventional catalytic converters. In order to increase this service life of conventional catalytic converters, a device is created in which due to cross-section continuity as flow ducts become smaller or whether or not there are internal cross-connections the greatest possible inherent activation coupled with the smallest possible pressure loss, is achieved and in addition there is a multi-stage filtration effect for solid particles, in which clogging is largely prevented.

VERARBEITUNGSVERHFAHREN UNTER VERWENDUNG VON DISPLAYINFORMATIONEN UND NACH DEM VERARBEITETE ZELLSTRUKTUR

WABENSTRUKTUR

Bereitgestellt wird eine Wabenstruktur, welche den Rückgang der isostatischen Festigkeit unterbinden kann. Die Wabenstruktur enthält einen säulenförmigen Wabenstrukturkörper 4, welcher eine poröse Trennwand 1 enthält. Wenn die Dicke (µm) der Trennwand als Tdefiniert ist und bei in der Trennwand 1 gebildeten Poren der Wert eines durchschnittlichen Porendurchmessers (µm) bestimmter Poren, deren mittels eines Quecksilber-Einpressverfahrens gemessene Porendurchmesser 20 bis 100 µm betragen, als Ddefiniert ist, ist T/Dbis, was ein durch Dividieren von Tdurch Derhaltener Wert ist, größer als oder gleich 2,4, beträgt ein Verhältnis eines Porenvolumens der bestimmten Poren zu einem Gesamt-Porenvolumen der Trennwand 1 5 bis 45% und ist ein Verhältnis eines Porenvolumens großer Poren, deren Porendurchmesser größer als oder gleich 100 µm sind, zu dem Gesamt-Porenvolumen der Trennwand 1 kleiner als oder gleich 5%.

Leitfähige Wabenstruktur

Eine leitfähige Wabenstruktur, die enthält:einen säulenförmigen leitfähigen Wabenstrukturabschnitt, der aufweisteine äußere Umfangsseitenwand; undTrennwände, die innerhalb der äußeren Umfangsseitenwand angeordnet sind und die mehrere Zellen definieren, um Strömungswege zu bilden, so dass ein Fluid durch eine erste Stirnfläche in die Strömungswege eintreten und durch eine zweite Stirnfläche austreten kann;wobei ein Paar von Elektrodenschichten, die sich in einer Strömungswegrichtung der Zellen erstrecken, einen Abschnitt einer Außenfläche der äußeren Umfangsseitenwand bildet,eine Elektrodenschicht des Paars von Elektrodenschichten auf einer Seite angeordnet ist, die über eine Mittelachse des Wabenstrukturabschnitts der anderen Elektrodenschicht gegenüberliegt, und,wenn die Wabenstruktur in der Strömungswegrichtung der Zellen in vier gleiche Abschnitte aufgeteilt ist, um vier Bereiche A, B, C und D von einer Seite näher bei der ersten Stirnfläche zu bilden, und ein Durchschnittswert der elektrischen ...

Honeycomb body used as catalyst carrier for purifying I.C. engine exhaust gases

Honeycomb body (1) has dividing walls (10) made of cordierite arranged in honeycomb form. A reinforcing section (2) stronger than the general section (19) is disposed at one end or both ends (11) in the longitudinal direction of the dividing walls (10). An Independent claim is also included for a process for production of a honeycomb body comprising forming a solution mixture (7) with which is mixed a material lowering the melting point of cordierite in a solvent, applying the solvent mixture to the end (11) of the body and calcining to form a reinforcing section (2) on the end which is stronger than the general section (19).

VERFAHREN ZUR HERSTELLUNG VON KERAMIKKÖRPERN

WABENFÖRMIGE STRUKTUR UND VERFAHREN ZUR HERSTELLUNG DERSELBEN

Abgasreiniger für eine Brennkraftmaschine

Traeger fuer Katalysatorstoffe

Elektrisch beheizbarer, in Teilbereiche unterteilter Wabenkörper mit zusätzlichen elektrischen Leiterelementen

Diesel oxidation catalyst and exhaust system

Gasoline particulate filter

ENGINE EXHAUST GAS CATALYTIC CONVERTER

Extruded honeycomb catalyst

Filter

EXHAUST GAS REACTOR

Exhaust system for a vehicular positive ignition internal combustion engine

DEVICE FOR REMOVING SOOT FROM EXHAUST GAS

Soot particles are removed from the exhaust gas of an internal combustion engine in a cyclone 11, which divides the gas into a clean gas flow, which exits through axial outlet 15, and a particle-enriched gas fraction which flows down to the closed end of the cyclone through an annular passage 18 and in through openings 25 to a filter 27, which is heated by a fuel-fed burner 19 to burn the soot, the combustion products returning to the main body of the cyclone by outlet 17. The filter may be axial flow or radial flow (Fig. 3) and may be horizontally oriented (Fig. 4). Outlet 15 may be extended down to embrace outlet 17 (Figs. 5, 6). …… ...

Catalytic converter mesh seals

FILTRATION SYSTEM

Exhaust system without a DOC having an ASC acting as a DOC in a sysyem with an SCR catalyst before the ASC

Positive ignition engine comprising an exhaust system including a filter therefor

Filtering particulate matter from exhaust gas

A filter for filtering particulate matter (PM) from exhaust gas emitted from a positive ignition engine comprises a porous substrate 10 having inlet and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores 12 of a first mean pore size. The porous structure is coated with a catalytic washcoat 14 comprising a plurality of solid particles, wherein the porous structure of the washcoated porous substrate contains pores 16 of a second mean pore size. The second mean pore size is less than the first mean pore size. The catalytic washcoat is a hydrocarbon trap comprising at least one molecular sieve which is un-metallised. Alternatively, the molecular sieve is catalysed with a platinum group metal. The washcoat may substantially cover surface pores of the porous structure or may sit substantially within the porous structure of the porous substrate. An exhaust system comprising the filter, a positive ignition engine comprising ...

Oxidation catalyst

A method of making a catalytic monolith comprises the steps of (i.) providing a calcined support material component, (ii.) providing a platinum group metal component, (iii.) preparing a washcoat comprising the calcined support material and platinum group metal component, and (iv.) applying the washcoat to a wall flow monolithic substrate. The support material comprises a mixed magnesium aluminium metal oxide having a magnesium content of 15wt% Mg or lower. Ideally the support material is calcined at 800ºC or higher and has a specific surface area of 250m2/g or lower. A catalysed soot filter (CSF) 36 comprising an oxidation catalyst disposed on a wall flow filter monolithic substrate is also claimed, the CSF having a support material and platinum group metal component of the method. The porosity of the substrate is preferably 40% or greater with the pores having a mean diameter in the range of 10-25µm. The platinum group metal component may comprise a mixture of platinum and palladium with ...

ASC/DEC with rear-concentrated exotherm generation

A catalyst article includes a substrate with an inlet side and an outlet side, a first zone and a second zone. The first zone includes an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst. The second zone includes a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC). The first zone is located upstream of the second zone. The first zone may include a bottom layer with a blend of: the platinum group metal on a support and the first SCR catalyst; and a top layer comprising a second SCR catalyst, the top layer located over the bottom layer. Methods of reducing emissions from an exhaust stream including contacting the exhaust stream with the catalyst article are also disclosed. Catalyst articles of the present invention may provide higher catalytic activity and selectivity also hydrocarbon (HC) oxidation and exotherm generation may be concentrated in the DOC (second/rear) zone ...

Extruded honeycomb catalyst

Filter substrate comprising zone-coated catalyst washcoat

A catalysed filter comprises a ceramic porous wall-flow filter substrate 20 having inlet channels defined by inlet wall surfaces and outlet channels defined by outlet wall surfaces. The inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size. The porous substrate is coated in part with an oxidation catalyst washcoat composition containing both rare earth metal oxide base metal catalytic agents and platinum group metal catalytic agents that are supported on refractory metal oxides. A washcoated part of the porous substrate contains pores of a second mean pore size, wherein the second mean pore size is less than the first mean pore size. The catalyst washcoat composition is disposed in a first zone comprising the inlet surfaces of a first substrate length less than a total substrate length. A second zone comprising the outlet surfaces of a second substrate length contains no washcoat and the sum of the substrate length in the ...

CATALYST SUPPORTS FOR DEVICES FOR PURIFYING ENGINE EXHAUST GASES

... 1406903 Catalyst support element and method of preparing such an element SOC GENERALE DES PRODUITS REFRACTAIRES 2 Feb 1973 [4 Feb 1972] 5362/73 Heading B1F A catalyst support element for a catalyzer apparatus for purification of motor exhaust gases comprises a porous rigid unitary element composed of interwoven ceramic fibres and refractory binding material, the bonded fibre composition having an apparent density of not more than 0.6, an open porosity of at least 70%, a compressive strength of at least 100% by weight, a shrinkage when heated from ambient temperature to 1,000‹C of not more than 2%, and a specific surface area of at least 10 m2/g, and shows substantially no deterioration after at least 100 thermal shocks, where a thermal shock is the effect occurring on the catalyst support of the sudden introduction thereof into an enclosure at 800‹C, maintaining it therein for 15 minutes, and thereafter cooling the catalyst support element in air at ambient temperature. A method ...

CATALYST SUPPORT AND PROCESS FOR ITS MANUFACTURE

... 1424126 Refractory coatings; catalysts FELDMUHLE ANLAGENUND PRODUKTIONS GmbH 18 Jan 1973 [18 Jan 1972 27 Dec 1972] 2729/73 Headings B1E and B2E [Also in Divisions B5 and F2] Catalysts for treating exhaust gases are carried on a supoprt which has been made (see Div. B5) by covering a fleece blank of desired shape, made up of fleeces of refractory inorganic fibres with at least every alternate fleece being corrugated, with a slip of refractory inorganic material, and drying and sintering at 1200-1800‹C to cause the inorganic materials to become sintered together. The slip may be applied in two stages, with sintering at 1200- 1400‹C in the second stage. The catalyst may be applied by spraying or immersion and may be obtained from a salt. Alternatively, the slip may contain catalytically active material, in some cases, e.g. cerium oxide, as the refractory component. In an example, a support is treated first with aluminium oxide slip and then, after sintering, with aluminium oxide-chromium oxide ...

SOOT BURN-OFF FILTER

Diesel oxidation catalyst and exhaust system

An oxidation catalyst for treating an exhaust gas from a diesel engine comprising: a first washcoat region comprising platinum, manganese and a first support material; a second washcoat region comprising a platinum group metal and a second support material; and a substrate having an inlet end and an outlet end; wherein the second washcoat region is arranged to contact the exhaust gases at the outlet end of the substrate and after contact of the exhaust gases with first washcoat region. The first washcoat region may be a first washcoat layer and the second washcoat region may be deposited on the first washcoat layer. The support materials may comprise a refractory metal oxide selected from the group consisting of alumina, silica, titania, zirconia, ceria and a mixed or composite oxide of two or more thereof. The refractory metal oxide may be optionally doped with a dopant. An exhaust system, vehicle or apparatus, and method of use comprising the catalyst are also disclosed.

An engine exhaust system

Zoned exhaust system

Exhaust system

Gasoline particulate filter

Diesel oxidation catalyst and exhaust system

Device for removing soot particles from the exhaust gas flow of an internal combustion engine

Device for removing soot particles from the exhaust gas flow of an internal combustion engine

IMPROVED MULLIT BODIES AND PROCEDURE FOR YOUR PRODUCTION

HONEYCOMB FILTER FOR EXHAUST EMISSION CONTROL

Honeycomb structure comprising an outer cement skin and a cement therefor

Disclosed is a honeycomb catalyst support structure comprising a honeycomb body and an outer layer or skin formed of a cement comprising an amorphous glass powder with a multimodal particle size distribution applied to an exterior surface of the honeycomb body. The multimodal particle size distribution is achieved through the use of a first glass powder having a first median particle size and at least a second glass powder having a second median particle size. In some embodiments, the first and second glass powders are the same amorphous glass consisting of fused silica. The cement may further include a fine-grained, sub-micron sized silica in the form of colloidal silica. The cement exhibits a coefficient of thermal expansion less than 15×10 −7 /° C., and preferably about 5×10 −7 /° C. after drying.

Electrically heated catalyst

Electricity is suppressed from flowing to a case ( 4 ) of an electrically heated catalyst ( 1 ). Provision is made for a heat generation element ( 2 ) adapted to be electrically energized to generate heat, the case ( 4 ) in which the heat generation element ( 2 ) is contained, a mat ( 5 ) arranged between the heat generation element ( 2 ) and the case ( 4 ) to insulate electricity and at the same time to support the heat generation element ( 2 ), an electrode ( 6 ) connected to the heat generation element ( 2 ) from outside of the case ( 4 ), an insulation part ( 7 ) to plug a gap between the case ( 4 ) and the electrode ( 6 ), an electrode chamber ( 8 ) which is a space formed around the electrode ( 6 ) at an inner side of the case ( 4 ) and at an outer side of the heat generation element ( 2 ), and which is formed by providing a gap between the electrode ( 6 ) and the mat ( 5 ), and a partition part ( 9 ) arranged in the electrode chamber ( 8 ) at an upstream side of the electrode ( 6 ) in a direction of flow of an exhaust gas, in such a manner that the exhaust gas flowing through the interior of the electrode chamber ( 8 ) impinges against the partition part ( 9 ).

Multiple Skewed Channel Bricks Mounted In Opposing Clocking Directions

A catalytic converter for use in motor vehicle exhaust systems includes a housing and a catalytic substrate disposed in the housing. The housing includes a central shell fixed to an inlet end cone and an outlet end cone. The catalytic substrate includes a primary body section is disposed in an internal chamber and has a plurality of skewed flow channels through which the hot exhaust gas flows. The skewed flow channels create turbulent flow to assist in improved light-off and improved purification efficiency.

Honeycomb filter

A honeycomb filter 100 includes honeycomb segments 4 , plugging portions 5 , and joining layers 7 , area of outflow end surface 12 of honeycomb segment is larger than area of inflow end surface 11 , and shape of cross section of honeycomb segment vertical to axial direction X has a similarity in axial direction X. Moreover, thickness of joining layer decreases in at least a part of joining layer in direction from inflow end surface side toward outflow end surface side, and length L 2 of joining layer in axial direction X is smaller than 95% of length L 1 of honeycomb segment in axial direction X. Furthermore, a region of honeycomb segments 4 , 5 mm or more from outflow end surface 12 in axial direction X, is not provided with joining layers 7 which join side surfaces of honeycomb segments 4 to each other.

CATALYTIC COMPOSITION WITH ADDED COPPER TRAPPING COMPONENT FOR NOx ABATEMENT

The present disclosure provides catalyst compositions for NOx conversion and wall-flow filter substrates comprising such catalyst compositions. Certain catalyst compositions include a zeolite with sufficient Cu exchanged into cation sites thereof to give a Cu/Al ratio of 0.1 to 0.5 and a CuO loading of 1 to 15 wt. %; and a copper trapping component (e.g., alumina) including a plurality of particles having a D90 particle size of about 0.5 to 20 microns in a concentration of about 1 to 20 wt. %. The zeolite and copper trapping component can be in the same washcoat layer or can be in different washcoat layers (such that the copper trapping component serves as a “pre-coating” on the wall-flow filter substrate).

Particulate matter filter with catalytic elements

Described herein is a selective catalytic reduction (SCR) filter that includes a substrate that includes a first surface on a first side of the substrate and second surface on a second side of the substrate. The SCR filter further includes a semi-permeable membrane applied to the first surface. Additionally, the SCR filter includes an SCR washcoat applied to the second surface.

METHOD FOR THE PREPARATION OF A CATALYSED MONOLITH

Method for the preparation of a catalysed monolithic body or a catalysed particulate filter by capillary suction of sol-solution containing catalytically active material and metal oxide catalyst carriers or precursors thereof into pores of monolithic substrate. 1. A method for the preparation of a catalysed monolith , comprising the steps ofa) providing a porous monolith substrate with a plurality of longitudinal flow channels separated by gas permeable partition walls, the monolith substrate having a first end face and at a distance to the first end face a second end face;b) in a container providing a sol solution at least in an amount corresponding to pore volume of the gas permeable partition walls, the sol solution containing a water soluble or colloidal precursor of one or more catalytically active compounds and a water soluble or colloidal precursor of one or more metal oxides catalyst carrier compounds, at least one of the one or more precursors is colloid and at least one of the one or more precursors is water soluble;c) placing the monolith substrate substantially vertically in the container with the first or second end face dipped into the sol solution;d) sucking up the sol solely by capillary forces into pores of the permeable partition walls from the end face dipped into the sol solution without applying vacuum or pressure to a predetermined distance in the permeable partition walls from the end face dipped into the sol solution;e) subsequently inverting the monolith substrate and placing the monolith substrate substantially vertically in the container with the opposite end face dipped into the sol solution;f) sucking up the sol solely by capillary forces into pores of the permeable partition walls from the opposite end face dipped into the sol solution without applying vacuum or pressure; andg) drying and calcining the thus coated monolith substrate.2. The method of claim 1 , wherein the predetermined distance is about half of the whole distance between ...

METHOD FOR THE PREPARATION OF A ZONE COATED CATALYSED MONOLITH

Method for zone coating of monolithic substrates by using different sol-solution containing different catalyst carrier precursors and metal catalyst precursors and suction of one of the sol-solution up into pores in the walls of the zone to be coated, solely by capillary forces and another different sol-solution into the walls of another zone to be coated by capillary forces. 1. A method for the preparation of a catalysed monolith zone coated with different catalysts , comprising the steps ofa) providing a porous monolith substrate with a plurality of longitudinal flow channels separated by gas permeable partition walls, the monolith substrate having a first end face and at a distance to the first end face a second end face;b) providing a first sol solution in an amount corresponding to at least the pore volume in a first catalyst zone of the gas permeable partition walls to be coated with the first sol solution, the first sol solution containing water soluble or suspended precursors of one or more catalytically active compounds and water soluble or suspended precursors or oxides of one or metal oxides catalyst carrier compounds, at least one of the one or more precursors or oxides is suspended and at least one of the one or more precursors is dissolved in the sol solution;c) providing a second sol solution in an amount corresponding to at least the pore volume in a second catalyst zone of the gas permeable partition walls to be coated with the second sol solution, the second sol solution containing water soluble or suspended precursors of one or more catalytically active compounds different to the catalytically active compounds in the first sol solution and water soluble or suspended precursors or oxides of one or more metal oxides catalyst carrier compounds, at least one of the one or more precursors or oxides is suspended and at least one of the one or more precursors is dissolved in the second sol solution;d) placing the porous monolith substrate substantially ...

AERODYNAMIC CATALYTIC CONVERTER

An improved catalytic converter includes a Coanda chamber assembly connected upstream of a catalytic reaction chamber, where the exhaust pipe is to be connected to the Coanda chamber assembly. The Coanda chamber assembly forms a Coanda chamber that has at least one narrower section and at least one wider section immediately downstream of the narrower section, with openings formed at the narrowest point of a narrower section. In operation, when engine exhaust gas is fed into the Coanda chamber, the gas pressure increases at the narrower section, and drops when the gas enters the wider section. As a result, air is sucked into the Coanda chamber via the openings and mixes with the exhaust gas. This lowers the exhaust temperature and enhances the efficiency of the catalytic reactions in the catalytic reaction chamber. 1. A catalytic converter comprising:a catalytic reaction chamber, which includes a catalytic reactor housing and a catalytic reactor core disposed inside the catalytic reactor housing; anda Coanda chamber assembly, having a downstream end connected to the catalytic reaction chamber and an upstream end adapted to be connected to an exhaust pipe, the Coanda chamber assembly including an interior housing which defines an interior space, wherein the interior space extends in a longitudinal direction and has varying diameters along the longitudinal direction defining a plurality of sections, including at least a first narrower section and a first wider section immediately downstream of the first narrow section, wherein a lateral dimension of a widest point of the first wider section is 2 to 3 times a lateral dimension of a narrowest point of the first narrower section, the interior housing further including one or more openings located at the narrowest point of the first narrower section or between the narrowest point of the first narrower section and the widest point of the first wider section.2. The catalytic converter of claim 1 , wherein the catalytic ...

THERMAL SHOCK RESISTANT AND ASYMMETRIC HONEYCOMB CERAMIC WALL-FLOW FILTER

A thermal shock resistant and asymmetric honeycomb ceramic wall-flow filter, comprising: an inlet honeycomb ceramic surface and an outlet honeycomb ceramic surface. Inlet channels () and outlet channels () are provided on both the inlet honeycomb ceramic surface and the outlet honeycomb ceramic surface. The inlet channels () are in communication with the outlet channels (). Outlet ends of the inlet channels () and inlet ends of the outlet channels () are sealed. An inner diameter of the inlet channel () is greater than that of the outlet channel (). A cross-section of the inlet channel () is a square, and is provided with a fillet, or two adjacent edges are connected by two connecting lines, or two adjacent edges are connected by two connecting lines or a circular arc located between the two connecting lines. A cross-section of the outlet channel () is a square, and is also provided with a fillet or a chamfer. The filter has good mechanical properties, low back pressure, and excellent thermal shock resistance. 112121212111. A thermal shock resistant and asymmetric honeycomb ceramic wall-flow filter , characterized by comprising an inlet honeycomb ceramic surface and an outlet honeycomb ceramic surface , wherein inlet channels () and outlet channels () are provided on both the inlet honeycomb ceramic surface and the outlet honeycomb ceramic surface , the inlet channels () are in communication with the outlet channels () , outlet ends of the inlet channels () and inlet ends of the outlet channels () are sealed , and an inner diameter of each inlet channel () is greater than that of each outlet channel (); a cross-section of each inlet channel () is a square and is provided with a fillet; or a cross-section of the inlet channel () is a square , two adjacent edges of the square are connected by two connecting lines , and an obtuse angle is formed between the two connecting lines; or a cross-section of the inlet channel () is a square , two adjacent edges of the square ...

PARTICULATE FILTER

A particulate filter for internal combustion engines includes a housing defining an inlet side and an outlet side and a core body disposed in the housing and having a plurality of longitudinal channels which extend parallel to a longitudinal axis of the core. The longitudinal channels include inlet channels that are closed off in the proximity of the outlet side and outlet channels that are closed off in the proximity of the inlet side. Each of the longitudinal channels has a circumferential cross section. The periphery of the circumferential cross section for at least the inlet channels has a concaved closed figure structure. 112-. (canceled)13. A particulate filter for internal combustion engines comprising a core body having a plurality of longitudinal channels formed therein which extend parallel to a longitudinal axis of the particulate filter , wherein each of the longitudinal channels has a constant cross sectional configuration with a circumference having a closed concaved shape.14. The particulate filter according to claim 13 , wherein the constant cross sectional configuration comprises at least one ridge on an inner surface thereof.15. The particulate filter according to claim 14 , wherein the constant cross sectional configuration comprises a concave polygon.16. The particulate filter according to claim 15 , wherein the concave polygon comprises an equiangular polygon.17. The particulate filter according to claim 15 , wherein the concave polygon comprises an equilateral polygon.18. The particulate filter according to claim 15 , wherein the concave polygon comprises a stellate polygon.19. The particulate filter according to claim 15 , wherein the concave polygon comprises a regular polygon.20. The particulate filter according to claim 15 , wherein the concave polygon comprises at least ten sides.21. The particulate filter according to claim 13 , wherein the circumferential cross sections of all longitudinal channels are the same shape.22. The particulate ...

Honeycomb bodies having an array of channels with different hydraulic diameters and methods of making the same

A honeycomb body comprises a matrix of intersecting porous walls forming channels. Plugs are disposed in a percentage of the channels having the second hydraulic diameter, wherein the percentage of the channels of the second diameter having a plug is less than or equal to 15%. In some embodiments, some of the channels have a first hydraulic diameter and others have a second hydraulic diameter that is smaller than the first hydraulic diameter, and may be unplugged for plugged. The porous walls can further comprise a transverse thickness of the walls Tw less than or equal to 0.20 mm, a channel density CD greater than or equal to 62 channels per cm2, an average bulk porosity % P greater than or equal to 50%, and a median pore diameter d50 ranging from between 4.0 μm and 30.0 μm.

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 1. A catalyst article consisting essentially of a wall flow monolith and a catalytic material , wherein the wall flow monolith has a plurality of longitudinally extending passages fatined by longitudinally extending walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , the wall flow monolith has a porosity of from 50% to 60% and an average pore size of from 10 to 25 microns , and the wall flow monolith contains the catalytic material;{'sup': '3', 'wherein the catalytic material comprises an SCR catalyst composition including a slurry-loaded washcoat of a zeolite and base metal selected from one or more of a copper and iron component, the washcoat permeating the walls at a loading up to 2.4 g/in, the wall flow monolith having integrated, NOx and particulate removal efficiency in which presence of the catalytic material in the wall flow monolith catalyzes the oxidation of soot.'}2. The catalyst article of claim 1 , wherein the SCR catalyst composition permeates the walls of the monolith at a concentration of at least 1.3 g/in.3. The catalyst article of claim 2 , wherein there is from 1.6 to 2.4 g/inof SCR catalyst composition disposed on the wall flow monolith.4. The catalyst article of claim 1 , wherein the SCR catalyst composition is effective to catalyze the reduction of NOx at a temperature below about 600° C. and is able to aid in regeneration of the wall flow monolith by lowering the temperature at which soot captured by the wall flow monolith is combusted.5. The catalyst article of ...

GASOLINE PARTICULATE FILTER

A catalytic wall-flow monolith for use in an emission treatment system comprises a porous substrate and a three-way catalyst (TWC), wherein the TWC is distributed substantially throughout the porous substrate and wherein the TWC comprises: 2. The catalytic wall-flow monolith according to claim 1 , wherein the OSC comprises a ceria.3. The catalytic wall-flow monolith according to claim 2 , wherein the OSC comprises a mixed oxide of cerium and zirconium; a mixed oxide of cerium claim 2 , zirconium claim 2 , and neodymium; a mixed oxide of praseodymium and zirconium; a mixed oxide of cerium claim 2 , zirconium and praseodymium; or a mixed oxide of praseodymium claim 2 , cerium claim 2 , lanthanum claim 2 , yttrium claim 2 , zirconium and neodymium.4. The catalytic wall-flow monolith according to claim 3 , wherein the OSC comprises praseodymium and is present at 2-10 wt %.5. The catalytic wall-flow monolith according to claim 3 , wherein the OSC comprises praseodymium and wherein the first plurality of channels comprises an on wall TWC coating comprising the OSC comprising praseodymium.6. The catalytic wall-flow monolith according to claim 1 , wherein the ratio by weight of OSC to alumina is about 75:25.7. The catalytic wall-flow monolith according to claim 1 , wherein the one or more platinum group metals is selected from Pt claim 1 , Pd and Rh claim 1 , or combinations of two or more thereof.8. The catalytic wall-flow monolith according to claim 1 , wherein the TWC is homogenous throughout the porous substrate.9. The catalytic wall-flow monolith according to claim 1 , wherein the monolith has a first face and a second face defining a longitudinal direction therebetween and first and second pluralities of channels extending in the longitudinal direction claim 1 ,wherein the first plurality of channels is open at the first face and closed at the second face, and wherein the second plurality of channels is open at the second face and closed at the first face,and wherein ...

Catalyzed SCR Filter and Emission Treatment System

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 1. A catalyst article consisting essentially of a wall flow monolith and a catalytic material ,wherein the wall flow monolith has a plurality of longitudinally extending passages formed by longitudinally extending walls bounding and defining said passages, wherein the passages comprise inlet passages having an open inlet end and a closed outlet end, and outlet passages having a closed inlet end and an open outlet end, the wall flow monolith has a porosity of from 50% to 60% and an average pore size of from 10 to 25 microns, and the wall flow monolith contains the catalytic material;{'sup': '3', 'wherein the catalytic material comprises an SCR catalyst composition including a slurry-loaded washcoat of a zeolite and base metal selected from copper, the washcoat permeating the walls at a loading up to 2.4 g/in, the wall flow monolith having integrated, NOx and particulate removal efficiency in which presence of the catalytic material in the wall flow monolith catalyzes the oxidation of soot.'}2. The catalyst article of claim 1 , wherein the SCR catalyst composition permeates the walls of the monolith at a concentration of at least 1.3 g/in.3. The catalyst article of claim 2 , wherein there is from 1.6 to 2.4 g/inof SCR catalyst composition disposed on the wall flow monolith.4. The catalyst article of claim 1 , wherein the SCR catalyst composition is effective to catalyze the reduction of NOx at a temperature below about 600° C. and is able to aid in regeneration of the wall flow monolith by lowering the temperature at which soot captured by the wall flow monolith is combusted.5. The catalyst article of claim 1 , wherein the SCR catalyst ...

QUICK PURIFICATION DEVICE FOR SMOKE AND EXHAUST GAS DISCHARGED FROM MARINE ENGINE

A quick purification device for smoke and exhaust gas discharged from a marine engine includes a vertical communicating tube, a necked portion, first flared portion, second flared portion and exhaust tail tube are formed on the top end of the communicating tube in sequence from bottom to top, and a plurality of straight-through ceramic filters are configured between the first and second flared portions; a waste water diversion pipe is connected to the lower end of the communicating tube; an air inlet is in communication with the communicating tube, being connected to the exhaust outlet of a marine engine; a first exhaust gas flushing device, second exhaust gas flushing device and a third exhaust gas flushing device are configured inside the communicating tube in sequence; the first, second and third exhaust gas flushing devices can spray fluid toward the inside of the communicating tube. 1. A quick purification device for smoke and exhaust gas discharged from a marine engine , comprising:a communicating tube, an axial direction thereof being vertically arranged, a necked portion, first flared portion, second flared portion and exhaust tail tube being formed on a top end of the communicating tube in sequence from bottom to top, the second flared portion being configured in such a way as to be inverted with respect to the first flared portion, a plurality of straight-through ceramic filters being configured between the first and second flared portions, a waste water diversion pipe being connected to a lower end of the communicating tube, and the exhaust tail pipe having an exhaust vent facing upward;an air inlet pipe, in communication with the communicating tube between the necked portion and waste water diversion pipe;a first exhaust gas flushing device, configured on an inner circumference of the communicating tube between the necked portion and air inlet, capable of spraying fluid toward an inside of the communicating tube;a second exhaust gas flushing device, ...

EXHAUST GAS FILTER

An exhaust gas filter for purifying exhaust gases including particulate matter discharged from an internal combustion engine includes a honeycomb structure whose axial direction matches an exhaust gas flow, a plug portion which selectively plugs upstream end faces of the honeycomb structure which faces the exhaust gas flow, and catalyst carried on the honeycomb structure. 1. An exhaust gas filter which purifies exhaust gases including particulate matter discharged from an internal combustion engine comprising:a honeycomb structure whose axial direction is a flow direction of the exhaust gases;a plug portion which partially plugs an upstream end face of the honeycomb structure which faces the exhaust gas flow; anda catalyst carried in the honeycomb structure,wherein the honeycomb structure has a plurality of partition walls, cells surrounded by the partition walls, with a first region not carrying the catalyst being disposed on the partition walls at an upstream side of the exhaust gas flow and a second region carrying the catalyst on the partition walls at a downstream side of the exhaust gas flow,wherein the partition walls have pores communicating between adjacent cells,wherein the plurality of the cells comprise open cells open in the axial direction and plugged cells whose upstream end faces face the exhaust gas flow and are plugged by the plug portion.2. The exhaust gas filter as set forth in claim 1 , wherein an axial direction length of the first region is set to the shortest length at which a maximum trapping ratio of the particular matter is reached.3. The exhaust gas filter as set forth in claim 1 , wherein the catalyst-coat layers including the catalyst are disposed on the partition cells in the second region and a concentration thereof is not less than 100 g/L.4. The exhaust gas filter as set forth in claim 3 , wherein a catalyst-coat layer in the open cells has a first end and a second end which are opposed to each other in a direction in which the ...

CERAMIC HONEYCOMB STRUCTURE AND ITS PRODUCTION METHOD

A ceramic honeycomb structure having pluralities of flow paths partitioned by porous cell walls; (a) the cell walls having porosity of 50-60%; and (b) in a pore diameter distribution in the cell walls measured by mercury porosimetry, (i) pore diameters at cumulative pore volumes corresponding to particular percentages of the total pore volume being within specific ranges and having specific relationships; and (ii) the difference between a logarithm of the pore diameter at a cumulative pore volume corresponding to 20% of the total pore volume and a logarithm of the pore diameter at 80% being 0.39 or less, and its production method. 1. A method for producing a ceramic honeycomb structure comprising the steps of extrusion-molding a moldable material comprising a ceramic material and hollow resin particles as a pore-forming material to a predetermined green body , and drying and sintering said green body;said moldable material comprising 3-9% by mass of said pore-forming material per 100% by mass of said ceramic material;said pore-forming material having a median particle diameter D50 of 20-53 μm, a particle diameter D5 at a cumulative volume corresponding to 5% of the total volume being 12-27 μm, a particle diameter D10 at a cumulative volume corresponding to 10% of the total volume being 15-30 μm, a particle diameter D90 at a cumulative volume corresponding to 90% of the total volume being 50-75 μm, a particle diameter D95 at a cumulative volume corresponding to 95% of the total volume being 60-90 μm, and D50/(D90-D10) being 0.85-1.30, in a curve of a cumulative volume to a particle diameter;said ceramic material comprising 15-25% by mass of silica, 40-43% by mass of talc, and 15-30% by mass of alumina, per 100% by mass of said ceramic material;said silica having a median particle diameter D50 of 15-30 μm, D10 of 10-20 μm, and D90 of 40-60 μm, the percentage of particles having diameters of 5μm or less being 1% or less by mass, the percentage of particles having ...

EXHAUST TREATMENT SYSTEM INCLUDING NICKEL-CONTAINING CATALYST

Methods and systems are provided for emissions control of a vehicle. In one example, a catalyst may include a cerium-based support material and a transition metal catalyst loaded on the support material, the transition metal catalyst including nickel and copper, wherein nickel in the transition metal catalyst is included in a monatomic layer loaded on the support material. In some examples, limiting nickel to the monatomic layer may mitigate extensive transition metal catalyst degradation ascribed to sintering of thicker nickel washcoat layers. Further, by utilizing the cerium-based support material, side reactions involving nickel in the transition metal catalyst with other support materials may be prevented. 1. A catalyst , comprising:a support material comprising one or more of cerium metal, ceria, and high-cerium cerium-zirconium oxide; anda transition metal catalyst loaded on the support material, the transition metal catalyst comprising nickel and copper;wherein nickel in the transition metal catalyst is included in a monatomic layer loaded on the support material.2. The catalyst of claim 1 , wherein a loading of nickel in the transition metal catalyst on the support material is greater than 0.001 g/mand less than 0.002 g/m.3. The catalyst of claim 1 , wherein nickel is present at about 12 wt. %.4. The catalyst of claim 1 , wherein a weight ratio of copper to nickel is about 1:49.5. The catalyst of claim 1 , wherein the high-cerium cerium-zirconium oxide is CeZrO.6. The catalyst of claim 1 , wherein alumina is present at a molar ratio of alumina to nickel of less than 0.20.7. The catalyst of claim 1 , wherein no alumina is present.8. A system for a vehicle claim 1 , comprising:a first emissions treatment device comprising a cerium-based support material and a transition metal catalyst washcoat, the transition metal catalyst washcoat comprising nickel and copper, with nickel in the transition metal catalyst washcoat included in only a monatomic layer loaded on ...

EXHAUST SYSTEM INCLUDING SCRF CATALYST WITH OXIDATION ZONE

Systems and methods of the present invention related to an exhaust gas purification system comprising: (a) a first injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas; (b) a diesel particulate filter including an inlet and an outlet, wherein the filter includes a selective catalyst reduction (SCR) catalyst and an oxidation catalyst; (c) a second injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas, located downstream of the filter; and (d) a downstream catalyst comprising a selective catalytic reduction catalyst, located downstream of the second injector. 1. An exhaust gas purification system comprising:a. a first injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas;b. a diesel particulate filter including an inlet and an outlet, wherein the filter includes a selective catalyst reduction (SCR) catalyst and an oxidation catalyst;c. a second injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas, located downstream of the filter; andd. a downstream catalyst comprising a selective catalytic reduction catalyst, located downstream of the second injector.2. The exhaust gas purification system of claim 1 , wherein the oxidation catalyst is coated on the outlet of the filter.3. The exhaust gas purification system of claim 1 , wherein the oxidation catalyst comprises one or more platinum group metals.4. The exhaust gas purification system of claim 1 , wherein the oxidation catalyst comprises platinum claim 1 , palladium claim 1 , or combinations thereof.5. The exhaust gas purification system of claim 1 , wherein the selective catalytic reduction catalyst comprises a metal oxide based SCR catalyst formulation claim 1 , a molecular sieve based SCR catalyst formulation claim 1 , or mixtures thereof.6. The exhaust gas purification system of claim 1 , wherein the downstream catalyst further comprises an ammonia oxidation catalyst.7. ...

Automated Guided Vehicle for an Emissions Control System

A mobile emissions control system having an emission capturing system and emission control system is provided for diesel engines operated on ocean-going ships at-berth. The emissions control system may be mounted on a towable chassis or mounted on a barge, allowing it to be placed alongside ocean-going ships at-berth. A crane or boom transfers a duct of the emissions capturing system extending from the emissions control system to the ship to capture exhaust from its engine. Alternatively, the system may be mounted on an automated guided vehicle (AGV) equipped with a tower and a crane. The crane mounted on the AGV then lifts the duct forming part of the emissions capture system to the ship's exhaust system to capture exhaust from the ship's diesel engine and transfers it to the emissions control system, which cleans the exhaust and then passes clean air into the atmosphere through an exhaust outlet. 1. An automated guided vehicle for carrying an emissions control system , the automated guided vehicle having a chassis , a tower mounted on the chassis and a telescopic crane supported by the tower , where the automated guided vehicle and telescopic crane can be controlled remotely.2. The automated guided vehicle of claim 1 , where an emissions control system is mounted on the chassis of the automated guided vehicle.3. The automated guided vehicle of claim 2 , where the automated guided vehicle includes a power source and where the power source is shared by the automated guided vehicle and the emissions control system.4. The automated guided vehicle of claim 2 , where the height of the tower is at least as tall as the height of the emissions control system.5. The automated guided vehicle of claim 2 , where a telescopic duct is attached to the emissions control system and is supported by the crane of the automated guided vehicle.6. The automated guided vehicle of claim 5 , where the crane is capable of extending the telescopic duct to a ship to capture the ship's exhaust. ...

Exhaust gas purifying filter

Provided is an exhaust gas purifying filter used with a HC purifying catalyst supported thereon. Numerous pores are formed in partitions of the exhaust gas purifying filter. In a cross-section of the partition, pores are open at a passage surface, having an open end of which the opening diameter is 50 μm or larger. In the cross-section of the partitions, the partitions include a narrow part where a pore diameter is 5 μm or more and the pore diameter becomes a minimum in a region. In the cross-section of the partitions, the region is positioned between a pair of virtual lines L 1 and L 2 extending from opposing sides of the opening end to a passage surface positioned opposite to the opening end along the wall thickness direction X, Z. The pore diameter at the narrow part is 6% or more and less than or equal to 20% of the opening diameter.

Exhaust gas purification filter

An exhaust gas purification filter is used so as to support a NO X purification catalyst. The exhaust gas purification filter includes a honeycomb structure portion and a plug portion. The honeycomb structure portion includes a partition wall and cells. Numerous pores are formed in the partition wall. The cells are partitioned by the partition walls and form a flow path for an exhaust gas. The plug portion alternately seals an inflow end surface or an outflow end surface for the exhaust gas in the cells. The partition wall has a gas permeability coefficient that is equal to or greater than 0.35×10 −12 m 2 , a pore volume ratio of pore diameters of 9 μm or less that is equal to or less than 25%, and an average pore diameter that is equal to or greater than 12 μm.

INTEGRATED CATALYST SYSTEM FOR STOICHIOMETRIC-BURN NATURAL GAS VEHICLES AND PREPARATION METHOD THEREFOR

Disclosed in the present invention is an integrated catalyst system for stoichiometric-burn natural gas vehicles, the catalyst system consisting of a three-way catalyst, a molecular sieve catalyst, and a base body, the three-way catalyst and the molecular sieve catalyst being coated on a surface of the base body. In the integrated three-way catalyst and molecular sieve catalyst system of the present invention, at the same time that pollutants such as CO, HC, and NOin the exhaust of stoichiometric-burn natural gas vehicles are processed, the produced byproduct NHcan also be processed, and the conversion rates of CO, HC, NO, and NHare high. 1. An integrated catalyst system for a stoichiometric-burn natural gas vehicle , characterized in that , the catalyst system consists of a three way catalyst , a molecular sieve catalyst and a base body , wherein the three way catalyst and the molecular sieve catalyst are coated on a surface of the base body , whereinthe three way catalyst and the molecular sieve catalyst are combined in the following way:the molecular sieve catalyst is uniformly added into a coating layer of the three way catalyst; orthe molecular sieve catalyst is coated on a surface of the three way catalyst; orthe molecular sieve catalyst is coated between two layers of the three way catalyst; orthe three way catalyst and the molecular sieve catalyst are coated in segments, wherein the three way catalyst is coated on a former segment of the base body, and the molecular sieve catalyst is coated on a latter segment of the base body.2. The integrated catalyst system according to claim 1 , characterized in that claim 1 , a combined loading amount of the three way catalyst and the molecular sieve catalyst is 150 g/L-300 g/L claim 1 , whereina loading amount ratio of the three way catalyst to the molecular sieve catalyst is (1:3)-(3:1).3. The integrated catalyst system according to claim 1 , characterized in that claim 1 , for the three way catalyst claim 1 , a ...

Honeycomb structure

A honeycomb structure of the present invention includes a honeycomb structure body and a pair of electrode member arranged at a side surface of the honeycomb structure body. The honeycomb structure body has an electrical resistivity of 1 to 200 Ωcm, and the respective pair of electrode members is formed into a band-like shape extending in a direction in which the cells extend. In a cross section perpendicular to the cell extending direction, one of the electrode members is arranged opposite to another of the electrode members sandwiching a center of the honeycomb structure body. One or more of slits, which being open to a side surface, are formed at the honeycomb structure body. At least the one slit is formed so as not to intersect with a straight line connecting center portions of the respective pair of electrode members in the cross section perpendicular to the cell extending direction.

EXHAUST GAS PURIFICATION FILTER

An exhaust gas purification filter is configured to he disposed in an exhaust passage in a gasoline engine. The exhaust gas purification filter includes partition walls including a plurality of pores, a plurality of cells partitioned by the partition walls, and sealing portions alternately sealing ends of a plurality of the cells in the exhaust gas purification filter. The partition walls each have an average pore diameter of more than 16 μm and less than 21 μm, and have a ratio of an average surface opening diameter of the pores in a partition wall surface to the average pore diameter of the partition wall of 0.66 or more and 0.94 or less. 1. An exhaust gas purification filter configured to be disposed in an exhaust passage in a gasoline engine , the exhaust gas purification filter comprising:partition walls each comprising a plurality of pores;a plurality of cells partitioned by the partition walls; andsealing portions alternately sealing ends of the plurality of the cells in the exhaust gas purification filter, wherein have an average pore diameter of more than 16 μm and less than 21 μm; and', 'have a ratio of an average surface opening diameter of the pores in a partition wall surface to the average pore diameter of the partition wall of 0.66 or more and 0.94 or less., 'the partition walls each2. The exhaust gas purification filter according to claim 1 , whereina presence ratio of a surface opening diameter of 25 μm or more of the pores in the partition wall surface is 20% or less.3. The exhaust gas purification filter according to claim 1 , whereina surface opening ratio of the pores in the partition wall surface is 30% or more and 40% or less.4. The exhaust gas purification filter according to claim 1 , wherein:with accumulated ash components of 20 g/L or more and 40 g/L or less,{'sub': c', '10', '10', 'c, 'a gas permeability coefficient ratio k/khas a value of 1.5 or less, where kis a gas permeability coefficient of the partition wall at a position of 10 mm ...

Temperature gradient correction of ammonia storage model

An exhaust gas treatment system includes a SCR device that stores a reductant that reacts with the NOx emissions and a reductant supply system to inject the reductant according to a reductant load model. At least one temperature sensor or model generates a temperature signal indicating an SCR temperature of the SCR device. The exhaust gas treatment system further includes a control module in electrical communication with the reductant supply system. The control module is configured to determine an amount of reductant that slips from the SCR device based on the at least one temperature signal and the rate of change of the SCR temperature. The control module further determines a correction factor based on the amount of slipped reductant to modify the reductant load model.

INTEGRATED EMISSIONS CONTROL SYSTEM

The disclosure provides a monolithic wall-flow filter catalytic article including a substrate having an aspect ratio of from about 1 to about 20, and having a functional coating composition disposed on the substrate, the functional coating composition including a first sorbent composition, an oxidation catalyst composition, and optionally, a second sorbent composition. The monolithic wall-flow filter catalytic article may be in a close-coupled position close to the engine. The disclosure further provides an integrated exhaust gas treatment system including the monolithic wall-flow filter catalytic article and may additionally include a flow-through monolith catalytic article. The flow-through monolith catalytic article includes a substrate having a selective catalytic reduction (SCR) coating composition disposed thereon. The integrated exhaust gas treatment system simplifies the traditional four-article system into a two-article Catalyzed Soot Filter (CSF) plus Selective Catalytic Reduction (SCR) CSF+SCR arrangement. 1. A monolithic wall-flow filter catalytic article comprising:a substrate having an axial length L, a diameter D, and a volume, wherein the substrate comprises a front, upstream end and a rear, downstream end defining the axial length, an aspect ratio defined by L/D of from about 1 to about 20; anda functional coating composition disposed on the substrate, the functional coating composition comprising a first sorbent composition, an oxidation catalyst composition, and optionally, a second sorbent composition.2. The monolithic wall-flow filter catalytic article of claim 1 , wherein the first sorbent composition comprises one or more of alkaline earth metal oxides claim 1 , alkaline earth metal carbonates claim 1 , rare earth oxides claim 1 , or molecular sieves.3. The monolithic wall-flow filter catalytic article of claim 1 , wherein the first sorbent composition comprises a zeolite selected from the group consisting of faujasite claim 1 , chabazite ...

A method for production of vanadium catalysts

A method for production of vanadium catalysts, including steps of 1) providing a mixture comprising a TiO2-based support and a composite oxide containing vanadium and antimony; 2) preparing a slurry containing the mixture obtained from step 1), and additive comprising at least one species selected from the group consisting of Si, Al, Zr, Ti, W and Mo, and a solvent; and 3) applying the slurry onto a substrate or processing the slurry into shaped bodies. The vanadium catalysts obtained/obtainable from the method, and use thereof for abatement of nitrogen oxides (NOx).

Honeycomb structure comprising a cement skin composition with crystalline inorganic fibrous material

Disclosed is a honeycomb support structure comprising a honeycomb body and an outer layer or skin formed of a cement that includes an inorganic filler material having a first coefficient of thermal expansion from 25 C to 600 C and a crystalline inorganic fibrous material having a second coefficient of thermal expansion from 25 C to 600 C. Skin cement composition controls level of cement liquid/colloid components, for example water, colloidal silica, and methylcellulose migration into the substrate during the skin application process to form barrier to skin wetting and staining during the washcoating process.

SYSTEMS AND METHODS FOR UNIFORMLY HEATING A HONEYCOMB BODY

An electrical heater and method for heating a catalyst. The heater includes a honeycomb body having intersecting walls forming channels extending along a longitudinal axis. A plurality of electrically resistive paths are included, each including at least a portion of the plurality of intersecting walls and extending a length across the honeycomb body transverse to the longitudinal axis. A positive electrode and a negative electrode are in electrical communication with each other via the resistive paths. The positive electrode and the negative electrode are operatively positioned to generate a respective flow of current through each resistive path. The lengths of at least two of the resistive paths differ from each other. The resistive paths are configured with respect to the at least one positive electrode and the at least one negative electrode such that the current in each of the resistive paths is substantially equal. 1. An electrical heater , comprising:a honeycomb body comprising a plurality of intersecting walls that form a plurality of channels extending along a longitudinal axis, the intersecting walls comprising a conductive material;a plurality of electrically resistive paths, each resistive path of the plurality of resistive paths comprising at least a portion of the plurality of intersecting walls and extending a length across the honeycomb body transverse to the longitudinal axis; andat least one positive electrode and at least one negative electrode in electrical communication with each other via the plurality of resistive paths, the at least one positive electrode and the at least one negative electrode being operatively positioned to generate a respective flow of current through each resistive path;wherein the lengths of at least two of the resistive paths differ from each other; andwherein the resistive paths are configured with respect to the at least one positive electrode and the at least one negative electrode such that the current in each of ...

EMISSIONS CONTROL SUBSTRATE

An emissions control substrate having a circuit in sidewalls thereof. The circuit changes resistance in response to accumulation of particles on the sidewalls that inhibits flow of exhaust through the emissions control substrate. 1. An emissions control substrate comprising:a first end and a second end opposite to the first end;a plurality of channels defined by sidewalls, the channels extending between the first end and the second end and configured to direct exhaust from an engine through the emissions control substrate; anda circuit included with the sidewalls, the circuit changes resistance in response to accumulation of particles on the sidewalls that inhibit flow of exhaust through the emissions control substrate.2. The emissions control substrate of claim 1 , wherein the emissions control substrate is a catalytic converter.3. The emissions control substrate of claim 1 , wherein the emissions control substrate is a particulate matter filter.4. The emissions control substrate of claim 1 , wherein the sidewalls are ceramic sidewalls that are permeable to exhaust.5. The emissions control substrate of claim 1 , wherein at least some of the plurality of channels include plugs along lengths thereof configured to restrict flow of exhaust through the plugs and force exhaust through the sidewalls to adjacent ones of the plurality of channels.6. The emissions control substrate of claim 1 , wherein:the sidewalls of the plurality of channels include ceramic; anda metallic layer on the sidewalls includes a metallic catalyst configured to catalyze at least one of: particulate matter filter regeneration; and conversion of carbon monoxide, hydrocarbons, and nitrogen oxides to carbon dioxide, water vapor, and nitrogen gas.7. The emissions control substrate of claim 6 , wherein the sidewalls include cordierite claim 6 , and the metallic catalyst includes a precious metal including at least one of the following: platinum; palladium; rhodium; cerium; iron; manganese; nickel; and ...

HONEYCOMB STRUCTURE

A honeycomb structure having a partition wall that forms a plurality of first channels and a plurality of second channels is provided. The first channels are open at a first end surface and closed at a second end surface The second channels are closed at the first end surface and open at the second end surface The partition wall has standard walls which separate the first channels and the second channels from each other, and a common wall which separates two first channels adjacent to each other at the first end surface and the standard walls are thicker than the common walls 1. A honeycomb structure comprising:a first end surface and a second end surface facing each other; anda partition wall that forms a plurality of first channels and a plurality of second channels extending in a facing direction between the first end surface and the second end surface,wherein the plurality of first channels are open at the first end surface and closed at the second end surface,the second channels are closed at the first end surface and open at the second end surface,the plurality of first channels are so provided that the first channels surround the second channels and so disposed that the first channels are adjacent to the second channels at the first end surface, at the first end surface,the partition wall includes standard walls that separate the first channels and the second channels from each other and a common wall that separates two of the first channels adjacent to each other at the first end surface,the standard walls are thicker than the common walls, andthe cross-sectional shape of the plurality of first channels are different from the cross-sectional shape of the plurality of second channels.2. The honeycomb structure according to claim 1 ,wherein at least five of the first channels are so provided that the at least five of the first channels surround the second channels and so disposed that each of the at least five of the first channels is adjacent to the second ...

CATALYTIC CONVERTERS WITH AGE-SUPPRESSING CATALYSTS

A catalytic converter includes a catalyst. The catalyst includes a support, platinum group metal (PGM) particles dispersed on the support, and metal oxide nanoparticles formed on the support. The metal oxide nanoparticles are dispersed between a first set of the PGM particles and a second set of the PGM particles to suppress aging of the PGM particles. 1. A catalytic converter , comprising: a support;', 'platinum group metal (PGM) particles dispersed on the support; and', 'metal oxide nanoparticles formed on the support, the metal oxide nanoparticles dispersed between a first set of the PGM particles and a second set of the PGM particles to suppress aging of the PGM particles., 'a catalyst including2. The catalytic converter as defined in claim 1 , wherein the support and the metal oxide nanoparticles are independently selected from the group consisting of AlO claim 1 , CeO claim 1 , ZrO claim 1 , CeO—ZrO claim 1 , SiO claim 1 , TiO claim 1 , MgO claim 1 , ZnO claim 1 , BaO claim 1 , KO claim 1 , NaO claim 1 , CaO claim 1 , and combinations thereof.3. The catalytic converter as defined in wherein the support is pre-sintered.4. The catalytic converter as defined in wherein each of the first set of the PGM particles and the second set of the PGM particles has at least one dimension up to 10 nm.5. The catalytic converter as defined in wherein the metal oxide nanoparticles are stacked to a height ranging from about 0.05× to about 10× claim 1 , where X is a dimension of at least one of the first and second sets of the PGM particles.6. The catalytic converter as defined in wherein the metal oxide nanoparticles make up from about 5 wt % to about 20 wt % of the catalyst.7. The catalytic converter as defined in wherein the metal oxide nanoparticles do not extend onto any of the PGM particles.8. The catalytic converter as defined in wherein the metal oxide nanoparticles are formed around each of the first and second sets of the PGM particles.9. The catalytic converter as ...

EXHAUST GAS PURIFICATION CATALYST BODY

Provided is an exhaust gas purification catalyst body that can improve exhaust gas purification performance while maintaining favorable PM collection performance. The exhaust gas purification catalyst body includes a base of a wall flow structure having an inlet side cell, an outlet side cell, and porous partition wall, and a catalyst layer that is formed in the partition wall that is in contact with the inlet side cell or the outlet side cell. The catalyst layer is formed in a region of at least 50% of the thickness of the partition wall from a surface of the partition wall, and held on the surface of internal pores in the partition wall in the region. 1. An exhaust gas purification catalyst body which is disposed in an exhaust passage of an internal combustion engine and purifies exhaust gas discharged from the internal combustion engine , comprising:a base of a wall flow structure having an inlet side cell in which an end on the exhaust gas inflow side is open, an outlet side cell which is adjacent to the inlet side cell and in which an end on the exhaust gas outflow side is open, and a porous partition wall that partitions the inlet side cell and the outlet side cell; anda catalyst layer that is formed in the partition wall, whereinthe catalyst layer is formed in a region of at least 50% of the thickness of the partition wall from a surface of the partition wall that faces at least one cell of the inlet side cell and the outlet side cell, and held on the surface of internal pores in the partition wall in the region, and, [{'br': None, 'A Подробнее

ELECTRIC HEATING TYPE SUPPORT, EXHAUST GAS PURIFYING DEVICE, AND METHOD FOR PRODUCING ELECTRIC HEATING TYPE SUPPORT

An electric heating type support includes: a pillar shaped honeycomb structure being configured to a ceramic, including: an outer peripheral wall; and partition walls disposed on an inner side of the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path; at least one electrode layer disposed on a surface of the outer peripheral wall of the pillar shaped honeycomb structure; and at least one electrode connecting portion provided on the at least one electrode layer, the at least one electrode connecting portion being connectable to a metal connector. The at least one electrode connecting portion has at least one independent rising portion, and a height of the at least one electrode connecting portion from a surface of the at least one electrode layer is from 1 to 6 mm. 1. An electric heating type support , comprising:a pillar shaped honeycomb structure being configured to a ceramic, comprising: an outer peripheral wall; and partition walls disposed on an inner side of the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path;at least one electrode layer disposed on a surface of the outer peripheral wall of the pillar shaped honeycomb structure; andat least one electrode connecting portion provided on the at least one electrode layer, the at least one electrode connecting portion being connectable to a metal connector,wherein the at least one electrode connecting portion has at least one independent rising portion, and a height of the at least one electrode connecting portion from a surface of the at least one electrode layer is from 1 to 6 mm.2. The electric heating type support according to claim 1 , wherein at least a surface of the electrode connecting portion is configured to a metal.3. The electric heating type support according to claim 2 , wherein the ...

Zoned configuration for oxidation catalyst combinations

The present disclosure generally provides an emission treatment system for at least partial conversion of gaseous CO emissions. The exhaust gas treatment system includes various components such as a first catalyst component selected from a LNT or an oxidation catalyst for the abatement of HC and CO, which contains a catalyst composition such as a platinum group metal component impregnated into a refractory oxide material. Another component in the exhaust gas treatment system is an SCR catalyst for the abatement of NOx, which contains a catalyst composition such as a metal ion-exchanged molecular sieve and can be optionally absent when the first catalyst component is an LNT. A second oxidation catalyst for further abatement of CO is also part of the emission treatment system and includes a third catalyst composition selected from a platinum group metal component, a base metal oxide component, or combinations thereof disposed onto a carrier substrate.

DIESEL OXIDATION CATALYST AND EXHAUST SYSTEM

An oxidation catalyst for treating an exhaust gas from a diesel engine and an exhaust system comprising the oxidation catalyst are described. The oxidation catalyst comprises: a first washcoat region for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material; a second washcoat region for oxidising nitric oxide (NO), wherein the second washcoat region comprises platinum (Pt), manganese (Mn) and a second support material; and a substrate having an inlet end and an outlet end; wherein the second washcoat region is arranged to contact the exhaust gas at the outlet end of the substrate and after contact of the exhaust gas with the first washcoat region. 1. An exhaust system for a diesel engine , which comprises an oxidation catalyst for treating an exhaust gas from the diesel engine and an emissions control device , wherein the oxidation catalyst comprises:a first washcoat zone for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material;a second washcoat zone for oxidising nitric oxide (NO), wherein the second washcoat zone comprises platinum (Pt) and manganese (Mn) disposed or supported on a second support material, wherein the second support material comprises a refractory metal oxide; anda substrate, andwherein the second washcoat zone is disposed at an outlet end of the substrate, and the first washcoat zone disposed at an inlet end of the substrate.2. An exhaust system according to claim 1 , wherein the second washcoat zone comprises platinum (Pt) as the only platinum group metal.3. An exhaust system according to claim 1 , wherein the second support material comprises a refractory metal oxide selected from the group consisting of alumina claim 1 , silica claim 1 , titania claim 1 , zirconia claim 1 , ceria and a mixed or composite oxide of two or more ...

DIESEL OXIDATION CATALYST AND EXHAUST SYSTEM

An oxidation catalyst for treating an exhaust gas from a diesel engine and an exhaust system comprising the oxidation catalyst are described. The oxidation catalyst comprises: a first washcoat region for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material; a second washcoat region for oxidising nitric oxide (NO), wherein the second washcoat region comprises platinum (Pt), manganese (Mn) and a second support material; and a substrate having an inlet end and an outlet end; wherein the second washcoat region is arranged to contact the exhaust gas at the outlet end of the substrate and after contact of the exhaust gas with the first washcoat region. 1. An oxidation catalyst for treating an exhaust gas from a diesel engine , which comprises:a first washcoat layer for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat layer comprises a first platinum group metal (PGM) and a first support material;a second washcoat layer for oxidising nitric oxide (NO), wherein the second washcoat layer comprises platinum (Pt) and manganese (Mn) disposed or supported on a second support material, wherein the second support material comprises a refractory metal oxide; anda substrate having an inlet end and an outlet end, andwherein the second washcoat layer is disposed on the first washcoat layer.2. An oxidation catalyst according to claim 1 , wherein the second washcoat layer comprises platinum (Pt) as the only platinum group metal.3. An oxidation catalyst according to claim 1 , wherein the second support material comprises a refractory metal oxide selected from the group consisting of alumina claim 1 , silica claim 1 , titania claim 1 , zirconia claim 1 , ceria and a mixed or composite oxide of two or more thereof.4. An oxidation catalyst according to claim 3 , wherein the second support material comprises alumina doped with silica.5. An oxidation ...

Exhaust gas treating device and manufacturing method of honeycomb structure

An exhaust gas treating device includes a honeycomb structure including an inner honeycomb structure body including a honeycomb substrate having porous inner partition walls and a circumferential wall disposed at a circumference of the honeycomb substrate, an outer honeycomb structure body disposed at a position which surrounds a part of a circumference of the inner honeycomb structure body and is away from the inner inflow end face, and plugging portions; and a can member storing the honeycomb structure. The can member includes an inflow tube and a barrel portion which is continuous with the inflow tube, and in the barrel portion an outlet is formed, the honeycomb structure is stored in the can member in a state of having a clearance between a second end face and the can member and having a clearance between the outer outflow end face and the can member.

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 127-. (canceled)28. A method for disposing a selective catalytic reduction (SCR) catalyst composition on a wall flow monolith , wherein the wall flow monolith has a plurality of longitudinally extending passages formed by longitudinally extending walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , the method comprising:receiving an aqueous slurry comprising the SCR catalyst composition, the SCR catalyst composition comprising a zeolite and a base metal component;immersing the wall flow monolith in the aqueous slurry from a first direction to deposit the SCR catalyst composition on the inlet passages;removing excess aqueous slurry from the inlet passages;immersing the wall flow monolith in the aqueous slurry from a second direction, opposite the first direction, to deposit the SCR catalyst composition on the outlet passages and form a coated wall flow monolith;removing excess aqueous slurry from the outlet passages; and{'sup': '3', 'drying and calcining the coated wall flow monolith to form an integrated soot filter and SCR catalyst, wherein the SCR catalyst composition is present on the coated wall flow monolith at a concentration of at least 1.3 g/in.'}29. The method of claim 28 , wherein the SCR catalyst composition permeates the walls.30. The method of claim 28 , wherein the SCR catalyst composition is present on the coated wall flow monolith at a concentration of 1.6 to 2.4 g/in.31. The method of claim 28 , wherein the calcining step comprises calcining at a temperature in the range ...

Single-layer 3-way catalytic converter

The invention relates to a catalytic converter for removing carbon monoxide, hydrocarbons and nitrogen oxides from the exhaust gas of internal combustion engines operated with stoichiometric air-fuel mixture, which catalytic converter comprises a substrate of the length L and a catalytic coating, characterized in that the coating is located on the walls of the substrate and extends, proceeding from one end of the substrate, over a length corresponding to at least 50% of L and comprises active aluminum oxide, two cerium/zirconium/rare-earth-metal mixed oxides different from each other, and at least one platinum group metal.

HONEYCOMB STRUCTURE

A cylindrical honeycomb structure has a partition wall forming A channels and B channels . The A channels are open at a first end surface and closed at a second end surface . The B channels are closed at the first end surface and open at the second end surface . The B channels include a first B channel and a second B channel extending substantially in parallel to each other. The A channels include first A channels , which surround the first B channel at the first end surface, and second A channels , which surround the second B channel at the first end surface. The partition wall has a first group partition wall , which separates adjacent channels of the first A channels and the second A channels from each other. 1. (canceled)2. A honeycomb structure comprising:a first end surface and a second end surface facing each other; anda partition wall that forms a plurality of A channels and a plurality of B channels extending in a facing direction between the first end surface and the second end surface,wherein the plurality of A channels are open at the first end surface and closed at the second end surface,the plurality of B channels are closed at the first end surface and open at the second end surface,the plurality of B channels include a first B channel and a second B channel extending in substantially parallel to each other,the plurality of A channels include a plurality of first A channels that surround the first B channel at the first end surface and a plurality of second A channels that surround the second B channel at the first end surface,the plurality of first A channels are adjacent to the first B channel but are not adjacent to the second B channel at the first end surface,the plurality of second A channels are adjacent to the second B channel but are not adjacent to the first B channel at the first end surface, andthe partition wall includes a first standard wall that separates the plurality of first A channels and the first B channel from each other, a ...

Stable Small-Pore Zeolites

The present invention provides crystalline aluminosilicate zeolites having a maximum pore size of eight tetrahedral atoms, wherein the zeolite has a total proton content of less than 2 mmol per gram. The zeolite may comprise 0.1 to 10 wt.-% of at least one transition metal, calculated as the respective oxide and based on the total weight of the zeolite. It may furthermore comprise at least one alkali or alkaline earth metal in a concentration of 0 to 2 wt.-%, calculated as the respective metal and based on the total weight of the zeolite. The zeolites may be used for the removal of NOx from automotive combustion exhaust gases. 120-. (canceled)21. A crystalline aluminosilicate zeolite having a maximum pore size of eight tetrahedral atoms , wherein the zeolite has a total proton content of less than 2 mmol per gram , and wherein the zeolite framework type material is chosen from AEI , CHA , LEV , ETL , ESV , and DDR.22. The crystalline aluminosilicate zeolite according to claim 21 , wherein the SAR is between 5 and 50.23. The crystalline aluminosilicate zeolite according to claim 21 , wherein the zeolite comprises at least one transition metal in a concentration of 0.1 to 10 wt.-% claim 21 , calculated as the respective oxides and based on the total weight of the zeolite.24. The crystalline aluminosilicate zeolite according to claim 23 , wherein the at least one transition metal is chosen from copper claim 23 , iron claim 23 , and mixtures thereof.25. The crystalline aluminosilicate zeolite according to claim 23 , wherein the at least one transition metal is introduced into the zeolite during the synthesis of said zeolite by an organic structure-directing agent comprising said at least one transition metal.26. The crystalline aluminosilicate zeolite according to claim 21 , wherein the zeolite comprises at least one alkali and/or alkaline earth metal in a concentration of 0 to 2 wt.-% claim 21 , calculated as the respective metals and based on the total weight of the ...

INDUCTIVELY HEATABLE CERAMIC BODY, METHOD FOR MANUFACTURING A CERAMIC BODY, EXHAUST GAS PURIFICATION DEVICE AND VEHICLE

The invention relates to a ceramic body which can be designed as a catalyst support and/or particulate filter and which has a plurality of channels and a plurality of elongate metal elements for inductive heating arranged in parallel with the channels, the elongate metal elements being arranged in the walls of the ceramic body. In this way, the free frontal area of the ceramic body is preferably reduced or is at least no more than 5%. The invention also relates to a method for producing the ceramic body, an exhaust gas purification device and a vehicle. 1. A ceramic body , comprising:a plurality of channels arranged in parallel, anda plurality of elongate metal elements for inductive heating arranged in parallel with the channels,wherein the elongate metal elements are arranged in walls of the ceramic body.2. The ceramic body according to claim 1 , wherein the metal elements are embedded in the walls so as to be adjacent to a channel and/or between two channels and/or four channels.3. The ceramic body according to claim 1 , wherein more than 50% claim 1 , of the surface of the metal elements is in contact with the surrounding ceramic.4. The ceramic body according to claim 1 , wherein the coefficient of thermal expansion of the metal elements deviates from that of the surrounding ceramic by less than 30%.5. The ceramic body according to claim 1 , wherein the metal elements have a diameter of 0.2-1.0 mm.6. The ceramic body according to claim 1 , wherein the lengths of the individual metal elements correspond to 0.8 to 0.95 times the length of the ceramic support claim 1 , and wherein it is possible for several shorter metal elements to be added together to form one metal element.7. The ceramic body according to claim 1 , wherein a frontal area of the ceramic body which is blocked by the metal elements being embedded is no more than 5%.8. The ceramic body according to claim 1 , wherein the walls of the ceramic body have a greater thickness in the region of metal ...

Catalytic converter structures with electrohydrodynamic heat and mass transfer

A catalytic converter assembly has a ceramic substrate body with a plurality of cells for passage therethrough of exhaust gases. An emitter electrode for emitting free electrodes is mounted adjacent the substrate body for intercepting exhaust gas flowing at an upstream location of the catalytic converter. A collector electrode for collecting electrons is mounted adjacent the substrate body to intercept exhaust gas flowing at a downstream location of the catalytic converter. An energizing circuit is used to apply a high voltage between the emitter and collector to stimulate the generation of free electrons.

HONEYCOMB STRUCTURE

A honeycomb structure includes a honeycomb substrate having a porous partition wall that defines a plurality of cells that extend from an inlet end face as an inlet side for a fluid to an outlet end face as an outlet side for the fluid, and a porous circumferential wall that is monolithically formed with the partition wall, and a coat layer that is disposed on at least a part of the outer surface of the circumferential wall. Here, a part of the coat layer penetrates into the pores of the circumferential wall, and a thickness of the part of the coat layer that penetrates into the pores of the circumferential wall is from 1 to 90% of the thickness of the circumferential wall. 1. A honeycomb structure , comprising:a honeycomb substrate having a porous partition wall that defines a plurality of cells that extend from an inlet end face as an inlet side for a fluid to an outlet end face as an outlet side for the fluid, and a porous circumferential wall that is formed monolithically with the partition wall, anda coat layer that is disposed on at least a part of the outer surface of the circumferential wall,wherein a part of the coat layer penetrates into the pores of the circumferential wall, and a thickness of the part of the coat layer that penetrates into the pores of the circumferential wall is from 1 to 90% of the thickness of the circumferential wall.2. A honeycomb structure , comprising:a honeycomb substrate having a porous partition wall that defines a plurality of cells that extend from an inlet end face as an inlet side for a fluid to an outlet end face as an outlet side for the fluid, and a porous circumferential wall having a porosity of 35% or more, that is formed separately from the partition wall, anda coat layer that is disposed on at least a part of the outer surface of the circumferential wall,wherein a part of the coat layer penetrates into the pores of the circumferential wall, and a thickness of the part of the coat layer that penetrates into the pores ...

POWDER FOR CATALYSTS AND CATALYST FOR EXHAUST GAS PURIFICATION

A catalyst powder according to the present invention is a catalyst powder that includes: a core portion that contains ceria and zirconia; and a surface layer portion that is located on the core portion and contains ceria and zirconia. The ratio (M/M) is 0.30 or more and 0.95 or less, the ratio (M/M) being the ratio of a mole fraction M(mol %) of cerium in the surface layer portion measured using X-ray photoelectron spectroscopy to a mole fraction M(mol %) of cerium in the entire powder. It is preferable that the ratio (M/M) between Mand Mis 1.1 or more and 5.0 or less, wherein M(=M/M) represents the ratio between a mole fraction M(mol %) of zirconium in the entire powder and a mole fraction M(mol %) of cerium in the entirety of the powder, and M(=M/M) represents the ratio between a mole fraction M(mol %) of zirconium measured using X-ray photoelectron spectroscopy and a mole fraction M(mol %) of cerium measured using X-ray photoelectron spectroscopy. 1. A catalyst powder comprising: a core portion that contains ceria and zirconia; and a surface layer portion that is located on the core portion and that contains ceria and zirconia ,{'sub': 2', '1', '2', '1', '2', '1, 'wherein a ratio (M/M) is 0.30 or more and 0.95 or less, the ratio (M/M) being a ratio of a mole fraction M(mol %) of cerium in the surface layer portion measured using X-ray photoelectron spectroscopy to a mole fraction M(mol %) of cerium in the entire powder.'}2. The catalyst powder according to claim 1 , comprising: a core particle that contains ceria and zirconia; and a supported metal oxide that is supported on a surface of the core particle and that contains ceria and zirconia claim 1 ,wherein the surface layer portion constitutes at least a portion of the supported metal oxide.3. The catalyst powder according to claim 1 ,{'sub': 4/2', '4', '2', '4', '2, 'wherein M(=M/M) that is a ratio of Mand Mis greater than 1,'}{'sub': 4', '2, 'wherein M(mol %) represents a mole fraction of zirconium in the ...

CATALYST COMPOSITION COMPRISING MAGNETIC MATERIAL ADAPTED FOR INDUCTIVE HEATING

The invention provides a catalyst composition, including a mixture of catalytically active particles and a magnetic material, such as superparamagnetic iron oxide nanoparticles, capable of inductive heating in response to an applied alternating electromagnetic field. The catalytically active particles will typically include a base metal, platinum group metal, oxide of base metal or platinum group metal, or combination thereof, and will be adapted for use in various catalytic systems, such as diesel oxidation catalysts, catalyzed soot filters, lean NOx traps, selective catalytic reduction catalysts, ammonia oxidation catalysts, or three-way catalysts. The invention also includes a system and method for heating a catalyst material, which includes a catalyst article that includes the catalyst composition and a conductor for receiving current and generating an alternating electromagnetic field in response thereto, the conductor positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material. 1. A catalyst composition , comprising a mixture of catalytically active particles and a magnetic material capable of inductive heating in response to an applied alternating electromagnetic field.2. The catalyst composition of claim 1 , wherein the magnetic material is superparamagnetic.3. The catalyst composition of claim 1 , wherein the magnetic material is in particulate form.4. The catalyst composition of claim 3 , wherein the magnetic material is in nanoparticle form.5. The catalyst composition of claim 1 , wherein the magnetic material comprises a transition metal or a rare earth metal.6. The catalyst composition of claim 1 , wherein the magnetic material comprises superparamagnetic iron oxide nanoparticles.7. The catalyst composition of claim 1 , wherein the magnetic material comprises a rare earth containing particulate material comprising neodymium-iron-boron or samarium-cobalt particles.8. The catalyst ...

EXHAUST GAS TREATMENT ARTICLE AND METHODS OF MANUFACTURING SAME

An article, includes a porous ceramic honeycomb body and a housing disposed on at least one of an outer periphery of the porous ceramic honeycomb body and opposing end faces of the porous ceramic honeycomb body, wherein the housing exerts a compressive force on the porous ceramic honeycomb body in at least one of radial direction and axial direction. A method of making the article, includes heating to greater than or equal to about 200 C the housing, crimping the housing tightly around the honeycomb body while the housing is greater than or equal to about 200 C, and cooling the housing. The housing exerts a compressive force on the porous ceramic honeycomb body in at least one of radial direction and axial direction by shrinking on cooling more than the honeycomb body. 1. An article , comprising:a porous ceramic honeycomb body having a plurality of channel walls extending from opposing end faces defining cell channels therebetween, and an outer periphery extending from one end face to the other; anda housing disposed on at least one of the outer periphery of the porous ceramic honeycomb body and the opposing end faces of the porous ceramic honeycomb body,wherein the housing exerts a compressive force on the porous ceramic honeycomb body in at least one of radial direction and axial direction.2. The article of claim 1 , wherein the housing exerts radial and axial compressive force on the porous ceramic honeycomb body.3. The article of claim 1 , wherein the housing is shrink-fit to the porous ceramic honeycomb body.4. The article of claim 1 , wherein the housing comprises metal.5. The article of claim 1 , wherein a mat is disposed on the outer periphery and the housing is disposed on the mat.6. The article of claim 1 , wherein no mat is disposed on the outer periphery.7. The article of claim 1 , wherein no skin is disposed on the outer periphery.8. The article of claim 1 , wherein the compressive force is >about 200 psi at about 25° C. and Подробнее

HIGH POROSITY CERAMIC HONEYCOMB STRUCTURE AND METHOD OF MANUFACTURING

A ceramic honeycomb structure having a web structure including a plurality of intersecting channel walls forming channels. The ceramic honeycomb structure has a total porosity greater than or equal to about 55%, an average channel wall thickness less than or equal to about 150 μm, a median pore diameter greater than or equal to about 10 μm, a dless than or equal to about 0.45, where d=(d−d)/d, and a strength (MOR/CFA) greater than or equal to about 900 psi. A method of manufacturing a ceramic honeycomb structure by mixing a ceramic precursor batch composition having a median particle diameter less than or equal to about 10 μm and at least one starch-based pore former having a median particle diameter greater than or equal to about 10 μm. The method also includes forming a mixture of ceramic precursor batch composition and a starch-based pore former into a green ceramic structure having a web structure, and firing the green ceramic structure to yield a ceramic honeycomb structure. 1. A ceramic honeycomb structure , the ceramic honeycomb structure having a web matrix comprising a plurality of intersecting channel walls forming channels and comprised of a ceramic material comprising:a total porosity greater than or equal to about 55%;an average channel wall thickness less than or equal to about 150 μm;a median pore diameter greater than or equal to about 10 μm;{'sub': f', 'f', '50', '10', '50, 'a dless than or equal to about 0.45, where d=(d−d)/d; and'}a strength (MOR/CFA) greater than or equal to about 900 psi.2. The ceramic honeycomb structure of claim 1 , wherein the average channel wall thickness is less than or equal to about 130 μm.3. The ceramic honeycomb structure of claim 1 , wherein the median pore diameter is from greater than about 10 μm to less than or equal to about 50 μm.4. The ceramic honeycomb structure of claim 1 , wherein the median pore diameter is from greater than or equal to about 13 μm to less than or equal to about 30 μm.5. The ceramic ...

EXHAUST GAS PURIFYING DEVICE OF INTERNAL COMBUSTION ENGINE

An exhaust gas purifying device includes: a columnar honeycomb carrier provided in an exhaust channel; a tubular case member housing the honeycomb carrier; and a retaining member surrounding the outer circumference of the honeycomb carrier. The honeycomb carrier has, in the outer circumferential edge of an inlet-side end face and an outlet-side end face, respectively, sloped surfaces sloped toward a direction in which the length in the center axis direction of the honeycomb carrier decreases. Of the retaining member, ends in the center axis direction of the honeycomb carrier extend to the sloped surfaces of the honeycomb carrier, and the ends have tapered parts which are longer in the center axis direction of the honeycomb carrier on the side facing the case member than on the side facing the honeycomb carrier. 1. An exhaust gas purifying device of an internal combustion engine provided in an exhaust channel of the internal combustion engine to purify exhaust gas of the internal combustion engine , the exhaust gas purifying device comprising:a columnar honeycomb carrier in which a plurality of cells extending from an exhaust gas inlet-side end face of the honeycomb carrier to an outlet-side end face of the honeycomb carrier and serving as exhaust gas passages are separated and partitioned by a porous partition wall;a tubular case member that houses the honeycomb carrier therein; anda retaining member that surrounds an outer circumference of the honeycomb carrier and disposed between the honeycomb carrier and the case member, wherein:the honeycomb carrier includes, at an outer circumferential edge at each of the inlet-side end face and the outlet-side end face, a sloped surface sloped toward a direction in which the length in a center axis direction of the honeycomb carrier decreases; andthe retaining member has an end in the center axis direction of the honeycomb carrier, the end extending to the sloped surface of the honeycomb carrier, and the end of the retaining ...

HONEYCOMB STRUCTURE

In a cross section of a honeycomb structure body, shape of the cells is polygonal, and the honeycomb structure body is constituted so that thickness of partition walls in circumferential region is larger than in central region. In the cross section, when among the cells arranged on a first line segment passing the center of gravity and extending in a direction perpendicular to the partition walls each constituting one side of the cells, cell pitch of the respective five or less cells each arranged on the first line segment toward each of the central region side and the circumferential region side from boundary between the central region and the circumferential region has a size of 70% or more and 95% or less to cell pitch in the extending direction of the first line segment of the cells in the central region of the honeycomb structure. 1. A honeycomb structure comprising:a tubular honeycomb structure body having porous partition walls to define a plurality of cells extending from a first end face to a second end face,wherein in a cross section perpendicular to an extending direction of the cells of the honeycomb structure body, the partition walls are disposed so that a shape of the cells is polygonal, andthe honeycomb structure body is constituted so that a thickness of the partition walls in a circumferential region positioned on an outer side of a central region is larger than a thickness of the partition walls in the central region including a center of gravity of the cross section, andin the cross section of the honeycomb structure body, when one line segment passing the center of gravity of the cross section and extending in a direction perpendicular to the partition walls each constituting one side of each of the polygonal cells is to be a first line segment, for respective five or less cells each arranged on the first line segment toward each of the central region side and the circumferential region side from a boundary between the central region and the ...

ELECTRIC HEATING TYPE SUPPORT AND EXHAUST GAS PURIFYING DEVICE

An electric heating type support includes: a pillar shaped honeycomb structure being configured to a ceramic, including: an outer peripheral wall; and a partition wall disposed on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path; an electrode layer disposed on a surface of the outer peripheral wall of the pillar shaped honeycomb structure; two or more underlayers having conductivity, the underlayers being provided on the electrode layer so as to be spaced apart from each other; and a metal electrode provided on the underlayers. 1. An electric heating type support , comprising:a pillar shaped honeycomb structure being configured to a ceramic, comprising: an outer peripheral wall; and a partition wall disposed on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path;an electrode layer disposed on a surface of the outer peripheral wall of the pillar shaped honeycomb structure;two or more underlayers having conductivity, the underlayers being provided on the electrode layer so as to be spaced apart from each other; anda metal electrode provided on the underlayers,wherein a surface of each of the underlayers has a concave portion forming a space between each of the underlayers and the metal electrode.2. The electric heating type support according to claim 1 , wherein each of the underlayers has a concave-convex region provided in a mesh shape on a surface of each of the underlayers on the metal electrode side claim 1 , and wherein the concave portion is a concave region of the concave-convex region.3. The electric heating type support according to claim 1 , wherein the concave portion is a groove portion extending in parallel to a plane direction of the underlayers.4. The electric heating type support according to claim 3 ...

EXHAUST GAS PURIFYING CATALYST

An exhaust gas purifying catalyst according to the present invention is provided with a base material and a catalyst-coated layer The catalyst-coated layer is provided with a lower layer and an upper layer The upper layer contains Rh and/or Pt as a noble metal catalyst. The lower layer contains Pd as a noble metal catalyst. The lower layer is provided with a front-stage lower layer positioned on an upstream side and a rear-stage lower layer positioned on a downstream side. The front-stage lower layer is a Ce-free layer that does not contain a Ce-containing oxide. The rear-stage lower layer is a Ce-containing layer that contains a Ce-containing oxide with a pyrochlore structure. 1. An exhaust gas purifying catalyst arranged inside an exhaust passage of an internal combustion engine and purifying exhaust gas discharged from the internal combustion engine , the exhaust gas purifying catalyst comprising: 'a catalyst-coated layer formed on a surface of the base material, wherein', 'a base material; and'}the catalyst-coated layer is formed in a laminate structure having upper and lower layers, with a layer closer to the base material surface being the lower layer and a layer relatively farther from the base material surface being the upper layer,the upper layer contains Rh and/or Pt as a noble metal catalyst, and a Ce-containing oxide which contains cerium,the lower layer contains Pd as a noble metal catalyst,the lower layer is provided with, in a circulation direction of the exhaust gas, a front-stage lower layer positioned on an upstream side and a rear-stage lower layer positioned on a downstream side,the front-stage lower layer is a Ce-free layer that does not contain a Ce-containing oxide, andthe rear-stage lower layer is a Ce-containing layer that contains a Ce-containing oxide with a pyrochlore structure.2. The exhaust gas purifying catalyst according to claim 1 , wherein an amount of Ce in the Ce-containing oxide with a pyrochlore structure in the rear-stage lower ...

EXHAUST GAS PURIFICATION CATALYST

Object and purpose are to provide an exhaust gas purification catalyst capable of efficiently removing a nitrogen oxide in a relatively low-temperature exhaust gas discharged from a marine diesel engine or the like using a reducing agent in a smaller amount than in the past. An exhaust gas purification catalyst is used in a combustion exhaust gas purification method for removing a nitrogen oxide in a combustion exhaust gas by reducing the nitrogen oxide to nitrogen, wherein an alcohol is added to the combustion exhaust gas as a reducing agent for reducing the nitrogen oxide, and is characterized in that the catalyst is composed of a support and a denitration catalytic metal supported on the support, and the support is a zeolite having a value (S) obtained by dividing a peak area (A) in an Al—OH spectrum measured with a Fourier transform infrared spectrometer (FT-IR) by a measurement support weight (W) of 1500 to 3500. 1. An exhaust gas purification catalyst , which is used in a combustion exhaust gas purification method for removing a nitrogen oxide in a combustion exhaust gas by reducing the nitrogen oxide to nitrogen , wherein an alcohol is added to the combustion exhaust gas as a reducing agent for reducing the nitrogen oxide , characterized in thatthe catalyst is composed of a support and a denitration catalytic metal supported on the support, and the support is a zeolite having a value (S) obtained by dividing a peak area (A) in an Al—OH spectrum measured with a Fourier transform infrared spectrometer (FT-IR) by a measurement support weight (W) of 1500 to 3500.2. The exhaust gas purification catalyst according to claim 1 , wherein the zeolite has an FER-type structure.3. The exhaust gas purification catalyst according to claim 1 , wherein the denitration catalytic metal is Bi.4. The exhaust gas purification catalyst according to claim 2 , wherein the denitration catalytic metal is Bi. The present invention relates to an exhaust gas purification catalyst for ...

EXHAUST GAS-PURIFYING COMPOSITION

An exhaust gas purifying composition of the present invention contains zeolite that is BEA zeolite having an SiO/AlOmolar ratio of greater than 25 and 600 or less and containing phosphorus. Furthermore, the exhaust gas purifying composition preferably contains zirconium in addition to phosphorus. Furthermore, the zeolite has an SiO/AlOmolar ratio of from 30 to 150. The present invention provides an exhaust gas purifying composition having excellent HC adsorbability for exhaust gas purification in internal combustion engines such as gasoline engines. 1. An exhaust gas purifying composition comprising BEA zeolite which has an SiO/AlOmolar ratio of greater than 25 and 600 or less and which contains phosphorus and zirconium , wherein an amount of the phosphorus contained in the zeolite is such that a molar ratio (P/Al) thereof with respect to Al in the BEA zeolite is 0.5 or greater , and an amount of the zirconium contained in the zeolite is such that a molar ratio (Zr/Al) thereof with respect to Al in the zeolite is 0.25 or greater.2. (canceled)3. The exhaust gas purifying composition according to claim 1 , wherein the zeolite has an SiO/AlOmolar ratio of from 30 to 150.4. Use of a composition for exhaust gas purification treatment claim 1 , the composition comprising BEA zeolite which has an SiO/AlOmolar ratio of greater than 25 and 600 or less and which contains phosphorus and zirconium claim 1 , wherein an amount of the phosphorus contained in the zeolite is such that a molar ratio (P/Al) thereof with respect to Al in the BEA zeolite is 0.5 or greater claim 1 , and an amount of the zirconium contained in the zeolite is such that a molar ratio (Zr/Al) thereof with respect to Al in the zeolite is 0.25 or greater.5. An exhaust gas purification method for purifying exhaust gas claim 1 , using a composition comprising BEA zeolite which has an SiO/AlOmolar ratio of greater than 25 and 600 or less and which contains phosphorus and zirconium claim 1 , wherein an amount of ...

DESULFATION METHOD FOR SCR CATALYST

The present invention provides methods for low temperature desulfating sulfur-poisoned SCR catalysts, and emission control systems adapted to apply such desulfating methods, in order to regenerate catalytic NOx conversion activity. The methods are adapted for treating an SCR catalyst to desorb sulfur from the surface of the SCR catalyst and increase NOx conversion activity of the SCR catalyst, the treating step including treating the SCR catalyst with a gaseous stream comprising a reductant for a first treatment time period and at a first treatment temperature, wherein the first treatment temperature is about 350° C. or less, followed by a second treatment time period and a second treatment temperature higher than the first treatment temperature, wherein the molar ratio of reductant to NOx during the treating step is about 1.05:1 or higher. 1. A method for desulfating a SCR catalyst having sulfur thereon , comprising treating the SCR catalyst to desorb sulfur from the surface of the SCR catalyst and increase NOx conversion activity of the SCR catalyst , the treating step comprising treating the SCR catalyst with a gaseous stream comprising a reductant for a first treatment time period and at a first treatment temperature , wherein the first treatment temperature is about 350° C. or less , followed by a second treatment time period and a second treatment temperature higher than the first treatment temperature , wherein the molar ratio of reductant to NOx during the treating step is about 1.05:1 or higher.2. The method of claim 1 , wherein the first treatment temperature is about 300° C. or less.3. The method of claim 1 , wherein the first treatment temperature is about 250° C. or less.4. The method of claim 1 , wherein the second treatment temperature is in the range of about 400° C. to about 600° C.5. The method of claim 1 , wherein the second treatment temperature is in the range of about 400° C. to about 450° C.6. The method of claim 1 , wherein both the first ...

DIRECT SYNTHESIS OF A SAPO MATERIAL WITH AFX STRUCTURE COMPRISING COPPER AND USE OF THIS MATERIAL

The invention concerns a process for preparing a copper-comprising SAPO material with AFX structure, comprising at least the steps of mixing, in an aqueous medium, at least one aluminum source, at least one silicon source, at least one copper source, at least one phosphorus source, a TETA complexing agent and a TMHD structuring agent, in order to obtain a gel, and hydrothermal treatment of said gel with a shear rate of less than 50 sin order to obtain crystallization of said copper-comprising SAPO material with AFX structure. 1. A process for preparing a copper-comprising SAPO material with AFX structure , comprising at least the following steps: {'br': None, 'i': a', ':b', ':c', ':d', 'e', ':f', 'g, 'sub': 2', '2', '3', '2', '5', '4', '2, 'SiOAlOPOTMHD:CuSOTETA:HO'}, 'a) mixing, in an aqueous medium, of at least one aluminum source, at least one silicon source, at least one copper source, at least one phosphorus source, a complexing agent, TETA, and a structuring agent, TMHD, in order to obtain a gel of formulaa/c being between 0.1 and 1, b/c being between 0.1 and 1, g/c being between 1 and 100, d/c being between 0.5 and 4, e/c being between 0.005 and 0.1 and f/e being between 1 and 1.5;{'sup': '−1', 'b) hydrothermal treatment of said gel at a temperature of between 170 and 220° C., under an autogenous reaction pressure, for a period of between 1 and 3 days with a shear rate of less than 50 sin order to obtain the crystallization of said copper-comprising SAPO material with AFX structure.'}2. The process as claimed in claim 1 , wherein said step b) is carried out at a temperature of between 190 and 210° C.3. The process as claimed in claim 1 , wherein said step b) is carried out for a period of between 1 and 2 days.4. The process as claimed in claim 1 , wherein said step b) is carried out in the absence of stirring.5. The process as claimed in claim 1 , said step b) is carried out with a shear rate of between 0.1 and 50 s.6. The process as claimed in claim 1 , ...

CATALYST FOR OXIDISING AMMONIA

A catalyst for oxidising ammonia comprises a selective catalytic reduction (SCR) catalyst and a composite heterogeneous extruded honeycomb having longitudinally extending parallel channels, which channels being defined in part by channel walls having a total longitudinal length, wherein the channel walls comprise a pore structure including a periodic arrangement of porous cells embedded in an inorganic matrix component, at least some of which porous cells are defined at least in part by an active interface layer of a catalytically active material comprising a precious metal supported on particles of a support material. 1. A catalyst for oxidising ammonia comprising a selective catalytic reduction (SCR) catalyst and a composite heterogeneous extruded honeycomb having longitudinally extending parallel channels , which channels being defined in part by channel walls having a total longitudinal length , wherein the channel walls comprise a pore structure including a periodic arrangement of porous cells embedded in an inorganic matrix component , at least some of which porous cells are defined at least in part by an active interface layer of a catalytically active material comprising a precious metal supported on particles of a support material.2. A catalyst according to claim 1 , wherein the porous cells in the periodic arrangement are interconnected by windows between cells claim 1 , which windows defining macro pores.3. A catalyst according to claim 1 , wherein the porous cells in the periodic arrangement are substantially not interconnected by windows between cells.4. A catalyst according to claim 1 , or claim 1 , wherein the support material for supporting the precious metal comprises ceria claim 1 , titania claim 1 , a crystalline molecular sieve claim 1 , alumina claim 1 , zirconia claim 1 , a mixed oxide of ceria and zirconia or a mixture of any two or more thereof.5. A catalyst according to any preceding claim claim 1 , wherein individual particles of support ...

Ferrite as three-way catalyst for treatment of exhaust gas from vehicle engine

A kind of ferrite used as a three-way catalyst for treatment of exhaust gas from vehicle engines is revealed. Mono-nitrogen oxides (NO X ), carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas from vehicle engines can be removed effectively by the three-way catalyst made from ferrite containing at least one substitutional metal.

CATALYTIC CONVERTERS WITH AGE-SUPPRESSING CATALYSTS

A catalytic converter includes a catalyst. The catalyst includes a supporting oxide layer. The catalyst also includes platinum group metal (PGM) particles partially embedded in the supporting oxide layer such that a portion of each PGM particle is surrounded by the supporting oxide layer and an other portion of each PGM particle remains exposed. 1. A catalytic converter , comprising: a supporting oxide layer; and', 'platinum group metal (PGM) particles partially embedded in the supporting oxide layer such that a portion of each PGM particle is surrounded by the supporting oxide layer and an other portion of each PGM particle remains exposed., 'a catalyst including2. The catalytic converter as defined in wherein the catalyst further includes a gap separating the supporting oxide layer from the portion of each PGM particle that is surrounded by the supporting oxide layer.3. The catalytic converter as defined in wherein the supporting oxide layer is in direct contact with the portion of each PGM particle.4. The catalytic converter as defined in wherein the supporting oxide layer is selected from the group consisting of AlO claim 1 , CeO claim 1 , ZrO claim 1 , CeO—ZrO claim 1 , SiO claim 1 , TiO claim 1 , MgO claim 1 , ZnO claim 1 , BaO claim 1 , KO claim 1 , NaO claim 1 , CaO claim 1 , and combinations thereof.5. The catalytic converter as defined in claim 1 , further comprising a monolith substrate having a honeycomb structure claim 1 , wherein the catalyst is applied on interior surfaces of the honeycomb structure.6. A method of suppressing aging of platinum group metal (PGM) particles in a catalytic converter claim 1 , the method comprising:depositing the PGM particles on a sacrificial layer;depositing a supporting oxide layer on the PGM particles and on the sacrificial layer, thereby surrounding a portion of each of the PGM particles with the supporting oxide layer to partially embed the PGM particles; andremoving the sacrificial layer, thereby exposing an other ...

LOW-TEMPERATURE OXIDATION CATALYSTS

An example of a catalytic converter includes a catalyst to improve low temperature oxidation of carbon monoxide (CO) and hydrocarbons. The catalyst includes a support, which includes a porous alumina structure and a rare earth metal oxide promoter impregnated into pores of the porous alumina structure. The rare earth metal oxide promoter is selected from the group consisting of CeOand CeO—ZrO. A platinum group metal (PGM) is bonded to the support. 1. A catalytic converter , comprising: [{'sub': 2', '2', '2, 'a support including a porous alumina structure and a rare earth metal oxide promoter impregnated into pores of the porous alumina structure, the rare earth metal oxide promoter being selected from the group consisting of CeOand CeO—ZrO; and'}, 'a platinum group metal (PGM) bonded to the support., 'a catalyst to improve low temperature oxidation of carbon monoxide (CO) and hydrocarbons, the catalyst including2. The catalytic converter as defined in wherein the PGM is selected from the group consisting of palladium claim 1 , platinum claim 1 , rhodium claim 1 , ruthenium claim 1 , iridium claim 1 , osmium claim 1 , and combinations thereof.3. The catalytic converter as defined in wherein the rare earth metal oxide promoter is present in an amount up to about 30 wt % of the catalyst.4. The catalytic converter as defined in wherein the PGM is present in an amount ranging from about 0.1 wt % to about 10 wt % of the catalyst.5. The catalytic converter as defined in wherein the rare earth metal oxide promoter is CeO—ZrOhaving a weight ratio of CeO:ZrOranging from about 90:10 to 10:90.6. The catalytic converter as defined in claim 1 , further comprising a monolith substrate having a honeycomb structure claim 1 , wherein the catalyst is applied on interior surfaces of the honeycomb structure.7. The catalytic converter as defined in wherein the catalytic converter is a diesel oxidation catalyst (DOC).8. The catalytic converter as defined in wherein a carbon monoxide (CO) ...

CATALYTIC CONVERTERS WITH AGE-SUPRESSING CATALYSTS

A catalytic converter includes a catalyst. The catalyst includes a support, platinum group metal (PGM) particles dispersed on the support, and a barrier formed on the support. The barrier is disposed between a first set of the PGM particles and a second set of the PGM particles to suppress aging of the PGM particles. 1. A catalytic converter , comprising: a support;', 'platinum group metal (PGM) particles dispersed on the support; and', 'a barrier formed on the support, the barrier disposed between a first set of the PGM particles and a second set of the PGM particles to suppress aging of the PGM particles., 'a catalyst including2. The catalytic converter as defined in claim 1 , wherein the support and the barrier are independently selected from the group consisting of AlO claim 1 , CeO claim 1 , ZrO claim 1 , CeO—ZrO claim 1 , SiO claim 1 , TiO claim 1 , and combinations thereof.3. The catalytic converter as defined in wherein the support is pre-sintered.4. The catalytic converter as defined in wherein the first set of the PGM particles is in a first space and the second set of the PGM particles is in a second space claim 1 , and wherein each of the first and second spaces has at least one dimension up to about 100 nm.5. The catalytic converter as defined in wherein the first set of the PGM particles is in a first space and the second set of the PGM particles is in a second space claim 1 , and wherein each of the first and second spaces has at least one dimension ranging from about 3 nm to about 5 nm.6. The catalytic converter as defined in wherein the barrier has a height ranging from about 0.05X to about 10X claim 1 , where X is a dimension of at least one of the first and second sets of the PGM particles.7. The catalytic converter as defined in wherein the barrier does not extend onto any of the PGM particles.8. The catalytic converter as defined in wherein the barrier is a continuous coating formed around each of the first and second sets of the PGM particles.9 ...

Forming age-suppressing catalysts

In an example of a method for forming a catalyst, a polymeric solution including a platinum group metal (PGM) is exposed to electrospinning to form carbon-based nanofibers containing PGM nanoparticles therein. An outer surface of the carbon-based nanofibers containing the PGM nanoparticles is coated with a metal oxide or a metal oxide precursor. The carbon-based nanofibers are selectively removed to form metal oxide nanotubes having PGM nanoparticles retained within a hollow portion thereof.

DEVICE FOR TREATING EXHAUST GAS FROM ENGINE AND METHOD FOR MANUFACTURING SAID DEVICE

A honeycomb-like porous filter for collecting PM in exhaust gas is provided in an exhaust gas passage of an engine. The exhaust gas flows from inflow side cells of the filter through pores of partition walls of the filter to outflow side cells A catalyst is supported on surfaces of the partition walls constituting the inflow side cells and on inner surfaces of the pores of the filter. The catalyst is supported on the surfaces of the partition walls more thickly than on the inner surfaces of the pores 1. A device for treating exhaust gas from an engine , the device comprisinga filter porous and provided in an exhaust gas passage of the engine and collecting particulate matter in exhaust gas,the exhaust gas passing through pores of the filter from surfaces of the filter and being discharged,a catalyst for purifying the exhaust gas being supported on the surfaces of the filter and inner surfaces of the pores, andthe catalyst being supported on the surfaces of the filter more thickly than on the inner surfaces of the pores.2. The device for treating exhaust gas from an engine of claim 1 , whereinan amount of the supported catalyst per unit area of the surfaces of the filter is 50 times or more and 500 times or less as much as an amount of the supported catalyst per unit area of the inner surfaces of the pores.3. The device for treating exhaust gas from an engine of claim 1 , the device further comprisinga catalytic converter provided on an upstream side of the filter in the exhaust gas passage and purifying the exhaust gas, whereinthe catalytic converter includes a catalyst which exhibits activity in oxidation reaction of unsaturated hydrocarbons whose number of carbon atoms is 6 to 9, andthe catalyst of the filter exhibits activity in oxidation reaction of saturated hydrocarbons whose number of carbon atoms is 5 or smaller.4. A method for manufacturing a device for treating exhaust gas from an engine claim 1 , the method comprising:a first step of immersing a filter, ...

NOVEL THREE-ZONE TWO-LAYER TWC CATALYST IN GASOLINE WASTE GAS APPLICATIONS

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end, an outlet end with an axial length L; an inlet catalyst layer beginning at the inlet end and extending for less than the axial length L, wherein the inlet catalyst layer comprises an inlet palladium component; an outlet catalyst layer beginning at the outlet end and extending for less than the axial length L, wherein the outlet catalyst layer comprises an outlet rhodium component; and wherein the outlet catalyst layer overlaps with the inlet catalyst layer. 1. A catalyst article for treating exhaust gas comprising:a substrate comprising an inlet end, an outlet end with an axial length L;an inlet catalyst layer beginning at the inlet end and extending for less than the axial length L, wherein the inlet catalyst layer comprises an inlet palladium component;an outlet catalyst layer beginning at the outlet end and extending for less than the axial length L, wherein the outlet catalyst layer comprises an outlet rhodium component; andwherein the outlet catalyst layer overlaps with the inlet catalyst layer.2. The catalyst article of claim 1 , wherein the inlet catalyst layer extends for 50 to 99 percent of the axial length L.3. The catalyst article of claim 1 , wherein the outlet catalyst layer extends for 50 to 99 percent of the axial length L.4. The catalyst article of claim 1 , wherein the outlet catalyst layer overlaps with the inlet catalyst layer for 5 to 90 percent of the axial length L.5. The catalyst article of claim 1 , wherein the outlet catalyst layer overlaps with the inlet catalyst layer for 40 to 80 percent of the axial length L.6. The catalyst article of claim 1 , wherein the inlet catalyst layer is essentially free of PGM metals other than the inlet palladium component.7. The catalyst article of claim 1 , wherein the inlet layer comprises up to 300 g/ftof ...

HYDROGEN-ASSISTED INTEGRATED EMISSION CONTROL SYSTEM

The invention provides an emission control system for treatment of an exhaust gas stream that includes an oxidation catalyst composition disposed on a substrate in fluid communication with the exhaust gas stream; at least one selective catalytic reduction (SCR) composition disposed on a substrate downstream from the oxidation catalyst composition, and a hydrogen injection article configured to introduce hydrogen into the exhaust gas stream upstream of the oxidation catalyst composition or downstream of the oxidation catalyst composition and upstream of the at least one SCR composition. The invention also provides a method of treating an exhaust gas stream, the method including receiving the exhaust gas stream into the emission control system of the invention and intermittently introducing hydrogen upstream of the oxidation catalyst article or downstream of the oxidation catalyst article and upstream stream of the SCR article. 1. An emission control system for treatment of an exhaust gas stream , comprising:an oxidation catalyst composition disposed on a substrate in fluid communication with the exhaust gas stream;at least one selective catalytic reduction (SCR) composition disposed on a substrate downstream from the oxidation catalyst composition; anda hydrogen injection article configured to introduce hydrogen into the exhaust gas stream upstream of the oxidation catalyst composition or downstream of the oxidation catalyst composition and upstream of the at least one SCR composition.2. The emission control system of claim 1 , wherein the substrate supporting the at least one SCR composition is a flow-through monolith or a monolithic wall-flow filter.3. The emission control system of claim 1 , wherein the at least one SCR composition is selected from the group consisting of a base metal-containing molecular sieve claim 1 , a platinum group metal component dispersed on a refractory metal oxide support claim 1 , and combinations thereof.4. The emission control system ...

Catalytically active particulate filter

The invention relates to a particulate filter which comprises a wall flow filter of length L and two different catalytically active coatings Y and Z, wherein the wall flow filter comprises channels E and A that extend in parallel between a first and a second end of the wall flow filter and are separated by porous walls which form surfaces OE and OA, respectively, and the channels E are closed at the second end and the channels A are closed at the first end. The invention is characterised in that the coating Y is located in the channels E on the surfaces OE and the coating Z is located in the channels A on the surfaces OA.

Inorganic Fiber-Formed Article, Mat for Exhaust Gas Cleaning Apparatus, and Exhaust Gas Cleaning Apparatus

Provided are an inorganic fiber-formed article having both high basis weight and excellent peel strength and a mat for an exhaust gas cleaning apparatus and an exhaust gas cleaning apparatus including the inorganic fiber-formed article. The inorganic fiber-formed article includes inorganic fibers and needle marks extending in the thickness direction and including vertical bundles composed of the inorganic fibers extending in the thickness direction, in which the average volume of the vertical bundles per needle mark measured by a prescribed peel test is 1.0 mmor more. 1. An article , comprising:inorganic fibers; andneedle marks extending in a thickness direction and each including a vertical bundle comprising inorganic fibers extending in the thickness direction,wherein{'sup': '3', '(I) an average volume of an effective vertical bundles per needle mark (v/n), determined by dividing a total volume of the effective vertical bundles in the region (v) by the number of the needle marks in the region (n), is 1.0 mmor more,'}wherein the effective vertical bundles are vertical bundles having a diameter of 100 μm or more and a protruding length of 2 mm or more among vertical bundles protruding from peeled surfaces in a region measuring 50 mm×50 mm after a peel test is performed, andin the peel test, a test specimen having a width of 50 mm and a length of 150 mm is cut out from the article, a cut having a depth of 30 mm is made in a middle of a thickness of an end face of the test specimen, and both ends formed by the cut are held by gripping jigs, mounted on a tensile testing machine, and pulled in opposite thickness directions at a speed of 500 mm/min into two pieces, or{'sup': '3', '(II) an average volume per the effective vertical bundle (V/N), determined by dividing the total volume of the effective vertical bundles (V) by the number of the effective vertical bundles (N), is 3.0 mmor more.'}2. The article according to claim 1 , wherein a needle mark density is 1 to 30 ...

EXHAUST GAS PURIFICATION FILTER AND METHOD OF MANUFACTURE THEREOF

An exhaust gas purification filter is provided which has a high capture ratio of particulate matter even when having a high porosity. The exhaust gas purification filter has a case, partition walls and cells. The partition walls are porous, and the interior of the case is partitioned into a plurality of the cells by the partition walls. The partition walls have a plurality of communicating pores which communicate between cells adjacent to respective partition walls. The degree of tortuosity L/T of the communicating pores satisfies L/T≥1.1, where T μm is the thickness of the partition walls and L μm is the average flow path length of the communicating pores. Furthermore the exhaust gas purification filter is manufactured using porous silica having a tapped bulk density that is no greater than a predetermined value. 1. An exhaust gas purification filter comprising:a casing; andporous partition walls that partition the interior of the casing into a plurality of cells,wherein the partition walls have a plurality of communicating pores that communicate between cells which are adjacent to respective partition walls, {'br': None, 'i': 'L/T≥', '1.1\u2003\u2003(1)'}, 'and wherein a degree of tortuosity L/T, defined by the ratio of the average path length L μm of the communicating pores to the thickness T μm of the partition walls, satisfies the following equation (1)2. The exhaust gas purification filter according to claim 1 , wherein the degree of tortuosity L/T further satisfies the following equation (2):{'br': None, 'i': 'L/T≤', '1.6\u2003\u2003(2)'}3. The exhaust gas purification filter according to claim 1 , wherein an average value of neck diameter Φμm and an average pore diameter Φμm in the partition walls satisfy the following equation (3) claim 1 , where the average value of neck diameter Φμm is defined by the average of respective equivalent circle diameters of neck portions having the smallest flow path areas in the communicating pores:{'br': None, 'sub': 1', '2, ...

Platinum group metal catalysts supported on large pore alumina support

The present disclosure provides a three-way conversion (TWC) catalyst composition suitable for at least partial conversion of gaseous hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx). Generally, the catalyst composition comprises a platinum group metal component impregnated into a porous refractory oxide support, wherein the porous refractory oxide support has an average pore radius ranging from about 250 Å to about 5,000 Å, a total intrusion volume of at least about 1.8 ml/g, and a porosity of at least about 80%.

Method and system for the purification of exhaust gas from an internal combustion engine

The invention provides a method and system for the purification of exhaust gas from an internal combustion engine, comprising a filter and a SCR catalyst. The filter is periodically regenerated increasing the temperature of the exhaust gas up to 850° C. and the water vapour content up to 100% by volume. The SCR catalyst comprises a hydrothermally microporous stable zeolite and/or zeotype having the AEI type framework and being promoted with copper.

Catalyst Material

The present invention provides an exhaust gas purification catalyst having an excellent purification performance for purifying chemically stable methane. A catalyst material includes a carrier formed of alumina and a catalyst formed of at least one of palladium and a palladium oxide directly supported on the carrier . A specific surface area of the carrier is preferably 20 m/g or more 90 m/g or less. In one preferred aspect, a proportion of Pd(100) and PdO(101) in crystal planes of the catalyst at a joint surface between the catalyst and the carrier is 20 number % or more. 1. A catalyst material used for purifying methane , comprising:a carrier formed of alumina; anda catalyst formed of at least one of palladium and a palladium oxide directly supported by the carrier,wherein{'sup': 2', '2, 'a specific surface area of the carrier is 20 m/g or more and 90 m/g or less.'}2. The catalyst material according to claim 1 , whereina proportion of Pd(100) and PdO(101) in crystal planes of the catalyst at a joint surface between the catalyst and the carrier is 20 number % or more.3. The catalyst material according to claim 1 , whereina proportion of θ(001), θ(111), and α(104) in crystal planes of the carrier at a joint surface between the catalyst and the carrier is 30 number % or more.4. The catalyst material according to claim 1 , whereinan average particle diameter of the catalyst is 20 nm or less.5. The catalyst material according to claim 1 , whereina supported ratio of the catalyst to a total amount of the carrier and the catalyst is 10 mass % or less.6. The catalyst material according to claim 1 , whereinthe catalyst material is used for purifying exhaust gas emitted from an internal combustion engine using natural gas as fuel.7. The catalyst material according to claim 2 , whereina proportion of θ(001), θ(111), and α(104) in crystal planes of the carrier at a joint surface between the catalyst and the carrier is 30 number % or more.8. The catalyst material according to ...

Porous material, honeycomb structure, and method of producing porous material

A porous material includes an aggregate, and a binding material that binds the aggregate together in a state where pores are formed. The porous material contains 0.1 to 10.0 mass % of an MgO component, 0.5 to 25.0 mass % of an Al 2 O 3 component, and 5.0 to 45.0 mass % of an SiO 2 component with respect to the mass of the whole porous material, and further contains 0.01 to 5.5 mass % of an Sr component in terms of SrO.

CONTOURED HONEYCOMB BODIES

Engine exhaust gas treatment article comprising a contoured honeycomb body () including a contoured outlet end face () are disclosed. Also disclosed are methods of manufacturing an engine exhaust gas treatment article. 1. An engine exhaust gas treatment article comprising:a honeycomb body comprising a longitudinal axis, a maximum axial length, a minimum axial length, a plurality of channel walls extending from an inlet end face to an outlet end face defining cell channels therebetween, and a radial area perpendicular to the longitudinal axis, and an outer periphery extending from the inlet end face to the outlet end face, wherein at least one of the inlet end face and the outlet end face of the honeycomb body includes a contour surface that provides a uniform exhaust gas residence time across the radial area of the honeycomb body perpendicular to the longitudinal axis that yields a reduction of at least 20% in a ratio of maximum residence to minimum residence of substrate that has flat surfaces on both ends when exhaust gas is flowed through the honeycomb body.2. The engine exhaust gas treatment article of claim 1 , wherein contour surface that provides a uniform exhaust gas residence time across the radial area of the honeycomb body that yields a reduction of at least 30% in the ratio of maximum residence to minimum residence of substrate that has flat surfaces on both ends when exhaust gas is flowed through the honeycomb body.3. The engine exhaust gas treatment article of claim 1 , wherein contour surface that provides a uniform exhaust gas residence time across the radial area of the honeycomb body that yields a reduction of at least 40% in the ratio of maximum residence to minimum residence of substrate that has flat surfaces on both ends when exhaust gas is flowed through the honeycomb body.4. The engine exhaust gas treatment article of claim 1 , wherein only the outlet end face includes a contour surface that provides a uniform exhaust gas residence time ...

Honeycomb filter

An object of the present invention is to provide a honeycomb filter having low pressure loss and high collection efficiency. The honeycomb filter of the present invention comprises a ceramic honeycomb substrate in which a multitude of cells through which a fluid flows are disposed in parallel in a longitudinal direction and are separated by cell walls, each cell being sealed at an end section at either the fluid inlet side or the fluid outlet side, and a filter layer which, among the surfaces of the cell walls, is formed on the surface of the cell walls of those cells in which the end section at the fluid inlet side is open and the end section at the fluid outlet side is sealed by a sealing material, wherein the filter layer comprises spherical ceramic particles, and the average particle size of the spherical ceramic particles increases gradually from the fluid inlet side toward the fluid outlet side.

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 1. A catalyst article consisting essentially of a wall flow monolith and a catalytic material , wherein the wall flow monolith has a plurality of longitudinally extending passages fatined by longitudinally extending walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , the wall flow monolith has a porosity of from 50% to 60% and an average pore size of from 10 to 25 microns , and the wall flow monolith contains the catalytic material;{'sup': '3', 'wherein the catalytic material comprises an SCR catalyst composition including a slurry-loaded washcoat of a zeolite and base metal selected from one or more of a copper and iron component, the washcoat permeating the walls at a loading up to 2.4 g/in, the wall flow monolith having integrated, NOx and particulate removal efficiency in which presence of the catalytic material in the wall flow monolith catalyzes the oxidation of soot.'}2. The catalyst article of claim 1 , wherein the SCR catalyst composition permeates the walls of the monolith at a concentration of at least 1.3 g/in.3. The catalyst article of claim 2 , wherein there is from 1.6 to 2.4 g/inof SCR catalyst composition disposed on the wall flow monolith.4. The catalyst article of claim 1 , wherein the SCR catalyst composition is effective to catalyze the reduction of NOx at a temperature below about 600° C. and is able to aid in regeneration of the wall flow monolith by lowering the temperature at which soot captured by the wall flow monolith is combusted.5. The catalyst article of ...

STRUCTURED CATALYST FOR OXIDATION FOR EXHAUST GAS PURIFICATION, METHOD FOR PRODUCING SAME, AUTOMOBILE EXHAUST GAS TREATMENT DEVICE, CATALYTIC MOLDING, AND GAS PURIFICATION METHOD

The structured catalyst for oxidation for exhaust gas purification includes a support having a porous structure constituted by a zeolite-type compound, and at least one type of oxidation catalyst that is present in the support and selected from the group consisting of metal and metal oxide, the support having channels that communicate with each other, and the oxidation catalyst being present in at least the channels of the support. 1. A structured catalyst for oxidation for exhaust gas purification , comprising:a support of a porous structure composed of a zeolite-type compound; andat least one oxidation catalyst present in the support and selected from the group consisting of metals and metal oxides, whereinthe support has channels that communicate with each other, andthe oxidation catalyst is present at least in the channels of the support,wherein the metal oxides contain at least one perovskite-type oxide,the channels have any one of a one-dimensional pore, a two-dimensional pore, and a three-dimensional pore defined by a framework of the zeolite-type compound and an enlarged pore portion that is different from any of the one-dimensional pore, the two-dimensional pore, and the three-dimensional pore, andthe oxidation catalyst is present at least in the enlarged pore portion.2. The structured catalyst for oxidation for exhaust gas purification according to claim 1 , wherein the enlarged pore portion causes a plurality of pores constituting any one of the one-dimensional pore claim 1 , the two-dimensional pore claim 1 , and the three-dimensional pore to communicate with each other.3. The structured catalyst for oxidation for exhaust gas purification according to claim 1 , whereinthe oxidation catalyst is made of at least one type of oxidation catalytic nanoparticles selected from the group consisting of metal nanoparticles and metal oxide nanoparticles, andan average particle size of the oxidation catalytic nanoparticles is greater than an average inner diameter of ...

PARTICULATE MATTER DETECTION APPARATUS

A particulate matter detection apparatus includes a particulate matter quantity detection means, a temperature detection means that detects the temperature of exhaust gas, a control unit and a heating means. The particulate matter quantity detection means includes a particulate matter deposition portion that deposits thereon part of particulate matter contained in the exhaust gas emitted from an internal combustion engine and a pair of opposite electrodes arranged apart from each other on the particulate matter deposition portion. The control unit determines a deposition quantity of the particulate matter on the particulate matter deposition portion based on an electrical signal outputted by the particulate matter quantity detection means and receives information on the temperature of the exhaust gas detected by the temperature detection means. The control unit controls the heating means to heat the particulate matter deposition portion to 300° C.-800° C. during a cold start of the internal combustion engine. 1. A particulate matter detection apparatus comprising:a particulate matter quantity detection means including a particulate matter deposition portion that deposits thereon part of particulate matter contained in exhaust gas emitted from an internal combustion engine and a pair of opposite electrodes arranged apart from each other on the particulate matter deposition portion, the particulate matter quantity detection means varying output of an electrical signal according to change in electrical characteristics caused by the deposition of the particulate matter on the particulate matter deposition portion;a temperature detection means that detects temperature of the exhaust gas or an exhaust pipe through which the exhaust gas flows;a control unit that determines a deposition quantity of the particulate matter on the particulate matter deposition portion based on the electrical signal outputted by the particulate matter quantity detection means and receives ...

PATTERN-PLUGGED HONEYCOMB BODIES, PARTICULATE FILTERS, AND EXTRUSION DIES THEREFOR

A honeycomb body having intersecting porous walls which includes first through fourth cells, wherein the cells extend from inlet to outlet face and are plugged to define a repeating structural unit with three inlets and one outlet channel. Repeating structural unit includes a first channel including length L, width W, and area A, a second channel including length L, the width W, and area A, a third channel including the length L, width W, and area A, and a fourth channel including the length L, the width W, and A, wherein the first through third channels are inlets and the fourth channel is a rectangular outlet and at least one of W≥Wand L≠L, i.e. W≥W, or L≠L, or W≥Wand L≠L. Repeating structural unit has a quadrilateral outer perimeter. Particulate filters including the honeycomb body, honeycomb extrusion dies, and methods of manufacturing the honeycomb body are provided. 1. A honeycomb extrusion die , comprising:a die body having an inlet face provided with a plurality of feedholes extending from the inlet face into the die body and an outlet face opposite from the inlet face; and [{'sub': 1′', '2′', '1′, 'a first die component having, in cross-section, a length L, a width W, and a cross-sectional area A,'}, {'sub': 2′', '2′', '2′, 'a second die component having in cross-section, a length L, the width W, and a cross-sectional area A,'}, {'sub': 1′', '1′', '3′, 'a third die component having, in cross-section, the length L, a width W, and a cross-sectional area A, and'}, {'sub': 2′', '1′', '4′, 'a fourth die component having, in cross-section, the length L, the width W, and a cross-sectional area A, the fourth die component having a rectangular shape in cross-section, and'}, 'wherein the die components are disposed in at least one of a first configuration or a second configuration, wherein:', {'sub': 1′', '2′', '1′', '2′', '4′', '3′', '2′', '1′, 'the first configuration is W>W and L=L and A=A>A=A, and'}, [{'br': None, 'sub': 1′', '2′', '4′', '3′', '2′', '1′, 'L≠L and ...

EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE

An exhaust purifying device provided in an exhaust passage of an internal combustion engine comprises: a column-shaped honeycomb carrier; a cylindrical case member adapted to house the honeycomb carrier; a holding member provided between the honeycomb carrier and the case member to surround the outer circumference of the honeycomb carrier; buffer members provided on a peripheral edge of the edge surface of at least one side of an inflow side edge surface and an outflow side edge surface of the honeycomb carrier so as to regulate the movement of the honeycomb carrier in the central axis X direction; and setting members secured to the case member to regulate the movement of the buffer members by allowing their position regulation parts to contact the buffer members; wherein the buffer members are provided, on the outer circumferential sides, with recesses into which the position regulation parts of the setting members are fitted. 1. An exhaust purifying device for an internal combustion engine provided in an exhaust passage of the internal combustion engine to purify exhaust of the internal combustion engine comprising:a column-shaped honeycomb carrier comprising a plurality of cells extending from an exhaust inflow side end surface of the honeycomb carrier to an exhaust outflow side end surface of the honeycomb carrier and each being a flow passage of the exhaust, the plurality of cells being defined by porous partitions;a cylindrical case member configured to house the honeycomb carrier;a holding member provided between the honeycomb carrier and the case member to surround an outer circumference of the honeycomb carrier;a buffer member provided on a peripheral edge of at least one of the inflow side end surface and the outflow side end surface of the honeycomb carrier so as to regulate movement of the honeycomb carrier along a central axis direction of the honeycomb carrier; anda setting member secured to the case member and including a position regulation member ...

HONEYCOMB FILTER

A honeycomb filter includes a plurality of cells and porous cell walls. Exhaust gas is to flow through the plurality of cells. The plurality of cells include exhaust gas introduction cells and exhaust gas emission cells. The honeycomb filter has a round cross sectional shape. Each of the exhaust gas emission cells is adjacently surrounded fully by the exhaust gas introduction cells. In the cross section, the exhaust gas introduction cells and the exhaust gas emission cells each have a polygonal shape. In the cross section, a side forming a cross sectional shape of each of the first exhaust gas introduction cells faces one of the exhaust gas emission cells, a side forming a cross sectional shape of each of the second exhaust gas introduction cells faces one of the exhaust gas emission cells. 1. A honeycomb filter comprising:a plurality of cells through which exhaust gas is to flow and which include exhaust gas introduction cells and exhaust gas emission cells, the exhaust gas introduction cells each having an open end at an exhaust gas introduction side and a plugged end at an exhaust gas emission side, the exhaust gas emission cells each having an open end at the exhaust gas emission side and a plugged end at the exhaust gas introduction side;porous cell walls defining rims of the plurality of cells;a round cross sectional shape;a ratio of length of the honeycomb filter to a diameter of the round cross sectional shape of less than 1.0;the exhaust gas introduction cells and the exhaust gas emission cells each having a uniform cross sectional shape except for a plugged portion in a cross section perpendicular to a longitudinal direction of the plurality of cells thoroughly from the exhaust gas introduction side to the exhaust gas emission side;the exhaust gas introduction cells including first exhaust gas introduction cells and second exhaust gas introduction cells, each of the second exhaust gas introduction cells having a cross sectional area larger than a cross ...

SINGLE BRICK SCR/ASC/PNA/DOC CLOSE-COUPLED CATALYST

A catalyst article including a substrate with an inlet side and an outlet side, a first zone and a second zone, where the first zone includes a passive NOx adsorber (PNA), and an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst; where the second zone includes a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); and where the first zone is located upstream of the second zone. The first zone may include a bottom layer with a blend of: (1) the platinum group metal on a support and (2) the first SCR catalyst; and a top layer with a second SCR catalyst, the top layer located over the bottom layer. 1. A catalyst article comprising a substrate comprising an inlet side and an outlet side , a first zone and a second zone , a passive NOx adsorber (PNA), and', 'an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst;, 'where the first zone comprises'}where the second zone comprises a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); andwhere the first zone is located upstream of the second zone.2. The catalyst article of claim 1 , wherein the first zone comprisesa. a bottom layer comprising a blend of: (1) the platinum group metal on a support and (2) the first SCR catalyst;b. a top layer comprising a second SCR catalyst, the top layer located over the bottom layer.3. The catalyst article of claim 1 , wherein the support comprises a siliceous material claim 1 , preferably wherein the siliceous material comprises a material selected from the group consisting of: (1) silica and (2) a zeolite with a silica-to-alumina ratio higher than 200.4. The catalyst article of claim 1 , wherein the platinum group metal is present on the support in an amount of 0.5 wt % to 10 wt % claim 1 , preferably 1 wt % to 6 wt % claim 1 , more preferably 1.5 wt % to 4 wt % ...

NOISE ATTENUATION COMPONENTS

A reduction device includes a housing defining an input chamber configured to receive exhaust from a power source, an output chamber, an exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and a longitudinal axis. The reduction device also includes a treatment unit disposed in the exhaust channel and along the longitudinal axis. The treatment unit is configured to at least partly remove pollutant species from the exhaust. The reduction device also includes an attenuation component disposed in the housing and radially outward of the treatment unit. The attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source. Additionally, the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit. 1. A reduction device , comprising: an input chamber configured to receive exhaust from a power source,', 'an output chamber downstream of the input chamber,', 'an exhaust channel disposed between the input chamber and the output chamber, the exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and', 'a longitudinal axis extending substantially centrally through the housing;, 'a housing defininga treatment unit disposed in the exhaust channel and along the longitudinal axis, the treatment unit being configured to at least partly remove pollutant species from the exhaust as the exhaust passes through the exhaust channel; and the attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source at a rated load, and', 'the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit., 'an attenuation component disposed in the housing and radially outward of the ...

Structures for catalytic converters

Various structures for catalytic convertors are disclosed herein. The device includes an outer housing enclosing a catalytic core. The catalytic core can be formed in a myriad of ways. Flow paths through the core are constructed so that they are not straight-line paths from the inlet of the device to the outlet of the device. Zigzag conformations and stacked panel arrays are described that maximize the catalytic surface area in a given volume of housing.

HOLDING MATERIAL, METHOD FOR PRODUCING SAME AND GAS TREATMENT DEVICE USING SAME

A holding material includes a stack of a first mat and a second mat, the first mat including alumina fibers that include 60 wt % or more of alumina and 40 wt % or less of silica, and the second mat including silica fibers that include 60 wt % or more of silica and 40 wt % or less of alumina and having a surface pressure higher than that of the first mat as measured at a gap bulk density of 0.30 g/cm. 1. A holding material comprising a stack of a first mat and a second mat ,the first mat comprising alumina fibers that comprise 60 wt % or more of alumina and 40 wt % or less of silica, and{'sup': '3', 'the second mat comprising silica fibers that comprise 60 wt % or more of silica and 40 wt % or less of alumina, and having a surface pressure higher than that of the first mat as measured at a gap bulk density of 0.30 g/cm.'}2. The holding material according to claim 1 , wherein either or both of the first mat and the second mat further comprise 1 to 20 wt % of an organic binder.3. The holding material according to claim 1 , having a thickness of 6 mm to 20 mm.4. The holding material according to claim 1 , the holding material being a cylindrical laminate in which the first mat is situated on an inner side claim 1 , and the second mat is situated on an outer side.5. The holding material according to claim 1 , the holding material being to be used for a gas treatment device.6. A method for producing a holding material comprising:producing a first mat using alumina fibers that comprise 60 wt % or more of alumina and 40 wt % or less of silica;producing a second mat using silica fibers that comprise 60 wt % or more of silica and 40 wt % or less of alumina, the second mat having a surface pressure higher than that of the first mat; andstacking and bonding the first mat and the second mat.7. A gas treatment device comprising:a processing structure that is formed to have a tubular shape;a casing that accommodates the processing structure therein; and{'claim-ref': {'@idref': ' ...

NANOFIBER AUGMENTED DIESEL PARTICULATE FILTERS

A particulate filter for use in an exhaust aftertreatment system includes a ceramic substrate and a plurality of ceramic nanofibers associated with pores of the ceramic substrate. The plurality of ceramic nanofibers may be positioned on pores of the ceramic substrate, within pore channels of the ceramic substrate, or both on pores of the ceramic substrate and within pore channels of the ceramic substrate. 1. A particulate filter for use in an exhaust aftertreatment system , the particulate filter comprising:a porous ceramic substrate comprising pores; anda plurality of ceramic nanofibers that are distinct from the porous ceramic substrate and that are associated with the pores of the porous ceramic substrate.2. The particulate filter of claim 1 , further comprising a catalyst layer deposited atop the porous ceramic substrate.3. The particulate filter of claim 1 , further comprising a catalyst layer deposited atop the plurality of ceramic nanofibers.4. The particulate filter of claim 1 , wherein the plurality of ceramic nanofibers are selectively positioned on a terminus of the pores of the porous ceramic substrate.5. The particulate filter of claim 1 , wherein the plurality of ceramic nanofibers have a diameter size distribution in the range of less than 1 μm.6. The particulate filter of claim 5 , wherein the plurality of ceramic nanofibers have a diameter size distribution in the range of less than 500 nm.7. The particulate filter of claim 6 , wherein the plurality of ceramic nanofibers have a diameter size distribution in the range of 10 nm to 250 nm.8. The particulate filter of claim 7 , wherein the plurality of ceramic nanofibers have a diameter size distribution in the range of 10 nm to 30 nm.9. The particulate filter of claim 1 , wherein the porous ceramic substrate has a mean pore size in the range of 4 μm to 80 μm.10. The particulate filter of claim 1 , wherein the plurality of ceramic nanofibers are positioned at an entrance of the pores of the porous ...

ION-EXCHANGED MOLECULAR SIEVE CATALYSTS EXHIBITING REDUCED N2O EMISSIONS

The present disclosure generally provides catalysts, catalyst articles and catalyst systems including such catalyst articles. In particular, the catalyst composition includes a metal ion-exchanged molecular sieve ion-exchanged with at least one additional metal, which reduces the number of metal centers often present in metal promoted zeolite catalysts. Methods of making and using the catalyst composition are also provided, as well as emission treatment systems including a catalyst article coated with the catalyst composition. The catalyst article present in such emission treatment systems is useful to catalyze the reduction of nitrogen oxides in gas exhaust in the presence of a reductant while minimizing the amount of dinitrogen oxide emission. 1. A catalyst composition comprising:a metal ion-exchanged molecular sieve, comprising an ion-exchanged metal within at least a portion of the exchange sites of the molecular sieve, wherein the ion-exchanged metal is a rare-earth metal or a transition metal, and a combination thereof, and further comprising a promoter metal on or in the molecular sieve, wherein at least a portion of the promoter metal is located on a surface of the sieve or in an intra-pore site other than an exchange site, and wherein the ion-exchange metal and promoter metal are not the same metal.2. The catalyst composition of claim 1 , wherein the ion-exchanged metal is selected from the group consisting of Cu claim 1 , Co claim 1 , Ni claim 1 , La claim 1 , Mn claim 1 , Fe claim 1 , V claim 1 , Ag claim 1 , Ce claim 1 , Nd claim 1 , Pr claim 1 , Ti claim 1 , Cr claim 1 , Zn claim 1 , Nb claim 1 , Mo claim 1 , Hf claim 1 , Y claim 1 , and W.3. The catalyst composition of claim 1 , wherein the molecular sieve is a small pore molecular sieve comprising an 8-ring pore opening structure having a pore size of about 3 to about 5 Angstroms.4. The catalyst composition of claim 3 , wherein the molecular sieve has a structure type selected from AEI claim 3 , AFT ...

CHA ZEOLITE MATERIAL AND RELATED METHOD OF SYNTHESIS

The invention provides a method of synthesizing a zeolite having the CHA crystalline framework, the method including forming a reaction mixture comprising an alumina source comprising a zeolite having an FAU crystalline framework, a silica source, and an organic structure directing agent, the reaction mixture—having a combined molar ratio of M/Si+R/Si higher than the molar ratio OH/Si, wherein M is moles of alkali metal and R is moles of organic structure directing agent; and crystallizing the reaction mixture to form a product zeolite having the CHA crystalline framework, wherein the product zeolite has a mesopore surface area (MSA) of less than about 25 m/g. The invention also includes catalyst articles made using the product zeolite, exhaust gas treatment systems including the catalyst articles, and methods of treating exhaust gas using the catalyst articles. 1. A method of synthesizing a zeolite having the CHA crystalline framework , comprising:{'sup': '−', 'i) forming a reaction mixture comprising at least one alumina source comprising a zeolite, at least one silica source, and at least one organic structure directing agent, the reaction mixture having a combined molar ratio of M/Si+R/Si higher than the molar ratio OH/Si, wherein M is moles of alkali metal and R is moles of organic structure directing agent; and'}{'sup': '2', 'ii) crystallizing the reaction mixture to form a product zeolite having the CHA crystalline framework, wherein the product zeolite has a mesopore surface area (MSA) of less than about 25 m/g.'}2. The method of claim 1 , wherein the zeolite of the alumina source has an FAU crystalline framework.3. The method of claim 2 , wherein the zeolite having an FAU crystalline framework is zeolite Y.4. The method of claim 3 , wherein the zeolite Y is in the Na+ form and has a silica-to-alumina ratio (SAR) in the range of about 3 to about 6.5. The method of claim 1 , wherein M is sodium and the alkali metal silicate solution is sodium silicate.6. The ...

PARTICULATE MATTER MEASURING DEVICE COMPONENT

A particulate matter measuring device component includes: a base portion formed of ceramics and having a flow channel through which a gas flows; a filter portion formed of porous ceramics and disposed inside the flow channel so as to divide the flow channel into a plurality of divisions; and a pair of electrodes for forming an electrostatic capacitance which is disposed in the base portion so as to sandwich at least a part of the filter portion, the flow channel being located on one end side of the base portion, a retaining portion being disposed on the other end side of the base portion. 1. A particulate matter measuring device component , comprising:a base portion formed of ceramics and having a flow channel through which a gas flows;a filter portion formed of porous ceramics and disposed inside the flow channel so as to divide the flow channel into a plurality of divisions; anda pair of electrodes for forming an electrostatic capacitance which is disposed in the base portion so as to sandwich at least a part of the filter portion,the flow channel being located on one end side of the base portion, a retaining portion being disposed on the other end side of the base portion.2. A particulate matter measuring device component , comprising:a base portion formed of ceramics and having a flow channel through which a gas flows;a filter portion formed of porous ceramics and disposed inside the flow channel so as to divide the flow channel into a plurality of divisions, anda pair of electrodes for forming an electrostatic capacitance which is disposed in the base portion so as to sandwich at least a part of the filter portion,the base portion having a height direction perpendicular to a length direction of the flow channel,when the base portion is bisected in the height direction, the flow channel being on only one bisected side of the base portion.3. A particulate matter measuring device component , comprising:a pair of base portions which are plate-shaped members formed ...

WALL-FLOW FILTER COMPRISING CATALYTIC WASHCOAT

A catalysed honeycomb wall-flow filter for treating exhaust gas comprising particulate matter emitted from an internal combustion engine, which filter comprising a honeycomb substrate having a first end and a second end and comprising an array of interconnecting porous walls defining an array of longitudinally extending first channels and second channels, wherein the first channels are bordered on their sides by the second channels and have a larger hydraulic diameter than the second channels, wherein the first channels are end-plugged at a first end of the honeycomb substrate and the second channels are end-plugged at a second end of the honeycomb substrate, wherein channel wall surfaces of the first channels comprise an on-wall-type catalytic washcoat. The invention also relates to an exhaust system comprising the catalysed filter and to methods of making it. 1. A catalysed honeycomb wall-flow filter for treating exhaust gas comprising particulate matter emitted from an internal combustion engine , which filter comprising a honeycomb substrate having a first end and a second end and comprising an array of interconnecting porous walls defining an array of longitudinally extending first channels and second channels , wherein the first channels are bordered on their sides by the second channels and have a larger hydraulic diameter than the second channels , wherein the first channels are end-plugged at a first end of the honeycomb substrate and the second channels are end-plugged at a second end of the honeycomb substrate , wherein channel wall surfaces of the first channels comprise an on-wall-type catalytic washcoat.2. A catalysed filter according to claim 1 , wherein the catalytic washcoat on channel wall surfaces of the first channels additionally permeates the interconnecting porous walls thereof.3. A catalysed filter according to claim 1 , wherein a catalytic washcoat is located at on-wall surfaces claim 1 , permeates the interconnecting porous wall or both at ...

Honeycomb structure, electrically heating support and exhaust gas purifying device

A honeycomb structure 20 according to the present invention includes: a honeycomb structure portion 10 including: an outer peripheral wall 12; a partition wall 13 arranged on an inner side of the outer peripheral wall 12, the partition wall 13 defining a plurality of cells 16 each extending from one end face to other end face to form a flow path; and a pair of electrode layers 14 a, 14 b arranged on a surface of the outer peripheral wall 12 of the honeycomb structure portion 10, the pair of electrode layers 14 being provided so as to face each other across a central axis of the honeycomb structure portion 10. The honeycomb structure portion 10 is made of ceramics having an NTC property, and the pair of electrode layers are made of a material having a PTC property.

CATALYST COMPOSITE AND USE THEREOF IN THE SELECTIVE CATALYTIC REDUCTION OF NOx

The present invention relates to a process for the preparation of a catalyst for selective catalytic reduction comprising• (i) preparing a mixture comprising a metal-organic framework material comprising an ion of a metal or metalloid selected from groups 2-5, groups 7-9, and groups 11-14 of the Periodic Table of the Elements, and at least one at least monodentate organic compound, a zeolitic material containing a metal as a non-framework element, optionally a solvent system, and optionally a pasting agent,• (ii) calcining of the mixture obtained in (i); and further relates to a catalyst per se comprising a composite material containing an amorphous mesoporous metal and/or metalloid oxide and a zeolitic material, wherein the zeolitic material contains a metal as non-framework element, as well as to the use of said catalyst.

HONEYCOMB STRUCTURE AND PRODUCTION METHOD FOR SAID HONEYCOMB STRUCTURE

The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, and when the pore size of the partition wall of the honeycomb fired body is measured by mercury porosimetry, and the measurement results are shown as a pore size distribution curve with pore size (μm) on the horizontal axis and log differential pore volume (ml) on the vertical axis, at least one peak is present in each of the pore size ranges of 0.01 to 0.1 μm and 0.1 to 5 μm. 1. A honeycomb structured body comprising:a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween,wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, andwhen the pore size of the partition wall of the honeycomb fired body is measured by mercury porosimetry, and the measurement results are shown as a pore size distribution curve with pore size (μm) on the horizontal axis and log differential pore volume (ml) on the vertical axis,at least one peak is present in each of the ranges of 0.01 to 0.1 μm and 0.1 to 5 μm.2. The honeycomb structured body according to claim 1 ,wherein the volume of pores having a size of 0.1 μm or less is 50% by volume or more relative to the total pore volume.3. The honeycomb structured body according to claim 2 ,wherein the volume of pores having a size of 0.1 μm or less is 70% by volume or more relative to the total pore volume.4. The honeycomb structured body according to claim 1 ,wherein the honeycomb fired body has a porosity of 55 to 70%.5. The honeycomb structured body according to claim 1 ,wherein the alumina particles are θ-phase alumina particles.6. The honeycomb ...

NH3 OVERDOSING-TOLERANT SCR CATALYST

Catalysts having a blend of platinum on a support with low ammonia storage with a Cu-SCR catalyst or an Fe-SCR catalyst are disclosed. The catalysts can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. Catalytic articles containing these catalysts are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described. 1. A catalytic article comprising a substrate having an inlet and outlet and coated with a first coating comprising a blend of (a) platinum on a molecular sieve support with low ammonia storage with (b) a first SCR catalyst; a second coating comprising a second SCR catalyst; wherein the second coating at least partially overlaps the first coating , where the ratio of the amount of the first SCR catalyst to the amount of platinum on the support with low ammonia storage is in the range of 10:1 to 50:1 , inclusive , based on the weight of these components.2. The catalytic article of claim 1 , wherein the first SCR catalyst is a Cu-SCR catalyst or a Fe-SCR catalyst.3. The catalytic article of claim 1 , where the second coating completely overlaps the first coating.4. The catalyst article of claim 1 , wherein the second coating overlaps at least 20% of the length of the first coating along an axis from the inlet to the outlet.5. The catalytic article of claim 1 , where the support comprises a silica or a zeolite with silica-to-alumina ratio of at least one of: (a) ≥100 claim 1 , (b) ≥200 claim 1 , (c) ≥250 claim 1 , ≥300 claim 1 , (d) ≥400 claim 1 , (e) ≥500 claim 1 , (f) ≥750 and (g) ≥1000.6. The catalyst of claim 1 , where the blend further comprises at least one of palladium (Pd) claim 1 , gold (Au) claim 1 , silver (Ag) claim 1 , ...

ROLLER DRUM PLUGGING OF HONEYCOMB BODIES

A method of plugging a honeycomb body is disclosed herein, the method comprising: applying a mask layer to the honeycomb body defining a plurality of channels, wherein the mask layer defines a plurality of holes aligned with the plurality of channels; rotating a roller drum; moving the honeycomb body over the roller drum to define a nip between the roller drum and the honeycomb body; and inserting a plugging cement in the nip between the roller drum and the mask layer such that the roller drum forces the plugging cement through the plurality of holes of the mask layer into the plurality of channels of the honeycomb body. 1. A method of plugging a honeycomb body , comprising the steps of:applying a mask layer to the honeycomb body defining a plurality of channels, wherein the mask layer defines a plurality of holes aligned with the plurality of channels;rotating a roller drum;moving the honeycomb body over the roller drum to define a nip between the roller drum and the honeycomb body; andinserting a plugging cement in the nip between the roller drum and the mask layer such that the roller drum forces the plugging cement through the plurality of holes of the mask layer into the plurality of channels of the honeycomb body.2. The method of claim 1 , wherein the roller drum comprises an embossed feature.3. The method of claim 2 , wherein the embossed feature comprises a lip having a perimeter larger than a perimeter of the honeycomb body.4. The method of claim 1 , wherein the roller drum comprises a plurality of embossed features claim 1 , wherein each of the embossed features comprises a lip to define a well.5. The method of claim 4 , further comprising the step of:positioning the plugging cement within the well of each of the embossed features.6. The method of claim 2 , further comprising the step of:conveying the plugging cement along a carrier web.7. The method of claim 6 , wherein the step of conveying the plugging cement along the carrier web further comprises ...

Catalyzed SCR Filter and Emission Treatment System

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia.

PARTICULATE FILTER

This particulate filter has a columnar ceramic honeycomb structure including first flow channels and second flow channels . Adjacently to each of the first flow channels , the second flow channel and the other first flow channel are arranged through a partition wall portion forming each of the first flow channels . A sum total of areas of the inner faces of the first flow channels per apparent unit volume of the ceramic honeycomb structure is 1.5 to 2.5 m/L; a number density of a total of the first flow channels and the second flow channels is 150 to 350 per unit square inch in a cross section perpendicular to an axis of the ceramic honeycomb structure ; and a hydraulic diameter of each of the first flow channels is 0.5 to 1.0 mm. 1. A particulate filter having a columnar ceramic honeycomb structure comprising a plurality of first flow channels and a plurality of second flow channels , whereinthe plurality of first flow channels extend in an axial direction of the ceramic honeycomb structure, are each opened in one end face, and are each closed in the other end face;the plurality of second flow channels extend in the axial direction of the ceramic honeycomb structure, are each opened in the other end face, and are each closed in the one end face;adjacently to each of the first flow channels, the second flow channel and the other first flow channel, are arranged so as to sandwich a partition wall portion forming each of the first flow channels;{'sup': '2', 'a sum total of areas of inner faces of the plurality of first flow channels in the total volume of the ceramic honeycomb structure is 1.5 to 2.5 m/L;'}a number density of a total of the plurality of first flow channels and the plurality of second flow channels is 150 to 350 per unit square inch in a cross section perpendicular to an axis of the ceramic honeycomb structure; anda hydraulic diameter of each of the plurality of first flow channels is 0.5 to 1.0 mm.2. The particulate filter according to claim 1 , ...

POROUS COMPOSITE

A porous composite includes a porous base material, and a porous collection layer provided on a collection surface of the base material (e.g., on inner surfaces of first cells). The collection layer contains catalyst particles of rare-earth oxide or transition-metal oxide situated in pores of the collection surface of the base material. The collection surface has a covered region that is covered with the collection layer and whose total area is 60% or less of the total area of the collection surface. 1. A porous composite comprising:a porous base material; anda porous collection layer provided on a collection surface of said base material,wherein said collection layer contains catalyst particles of rare-earth oxide or transition-metal oxide situated in pores of said collection surface of said base material, andsaid collection surface has a covered region that is covered with said collection layer and whose total area is 60% or less of a total area of said collection surface.2. The porous composite according to claim 1 , wherein{'sub': '2', 'said catalyst particles are made of CeO, lanthanum-manganese-cerium oxide, or lanthanum-praseodymium-cerium oxide.'}3. The porous composite according to claim 1 , whereinsaid catalyst particles have a maximum particle size less than or equal to 10 μm, andsaid catalyst particles have a median diameter less than 1.0 μm.4. The porous composite according to claim 1 , whereina total area of said covered region situated in a region other than the pores of said collection surface is 30% or less of the total area of said collection surface.5. The porous composite according to claim 1 , whereinsaid collection layer in the pores of said collection surface of said base material has a porosity higher than or equal to 20% and lower than or equal to 80%.6. The porous composite according to claim 1 , whereinsaid base material has a honeycomb structure whose interior is partitioned into a plurality of cells by a partition wall, andat least some ...