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, ...

СПОСОБ КОНВЕРСИИ УГЛЕВОДОРОДОВ С ИСПОЛЬЗОВАНИЕМ СВЯЗАННОГО ЦЕОЛИТОМ ЦЕОЛИТНОГО КАТАЛИЗАТОРА

Использование: в нефтехимии. Сущность: углеводородное сырье контактирует в условиях конверсии углеводородов со связанным цеолитом цеолитным катализатором, включающим (а) первые кристаллы первого цеолита и (б) связующее вещество, содержащее вторые кристаллы второго цеолита, средний размер частиц которых меньше размера первых кристаллов, причем вторые кристаллы находятся в сращенном состоянии с первыми кристаллами и образуют на них покрытие или частичное покрытие. Технический результат - повышение селективности процесса. 50 з.п. ф-лы, 8 табл., 4 ил.

ЗОНИРОВАННЫЕ КАТАЛИТИЧЕСКИЕ КОМПОЗИТЫ

Изобретение относится к области очистки отработавших газов. Зонированный каталитический композит для потока выхлопных газов двигателя внутреннего сгорания включает монолитный носитель, состоящий из множества продольных каналов. Композит содержит зону, которая начинается от одного конца носителя и проходит по направлению оси вдоль продольных каналов так, что зона имеет плоский профиль. Зона включает каталитический материал, который действует, чтобы преобразовывать и/или улавливать один или несколько компонентов в потоке выхлопных газов. Длина зоны от одного конца носителя изменяется в диапазоне от 0 до 15% длины всего носителя от канала к каналу. Также предоставлены способы изготовления и применения каталитического композита. 4 н. и 10 з.п. ф-лы, 7 ил.

СМЕШАННЫЕ КАТАЛИТИЧЕСКИЕ КОМПОЗИЦИИ МЕТАЛЛИЧЕСКИХ КРУПНОКРИСТАЛЛИЧЕСКИХ МОЛЕКУЛЯРНЫХ СИТ, КАТАЛИТИЧЕСКИЕ ИЗДЕЛИЯ, СИСТЕМЫ И СПОСОБЫ

Описаны каталитическое изделие, способ селективного восстановления оксидов азота и система для обработки выхлопных газов. Каталитическое изделие включает подложку, имеющую, по меньшей мере, покрытие из пористого оксида на ней, так, чтобы содержать и первое молекулярное сито, промотированное медью, и второе молекулярное сито, промотированное железом. При этом первые и вторые молекулярные сита имеют d6r блок, и первое молекулярное сито имеет кристаллы кубической формы со средним размером кристалла от 0.5 до 2 микрон. Массовое соотношение промотированного медью молекулярного сита к промотированному железом молекулярному ситу составляет от 1:1 до 4:1. Технический результат - улучшение характеристик каталитического изделия для селективного восстановления оксидов азота при высоких и низких температурах и более низкое образование NO. 3 н. и 32 з.п. ф-лы, 6 ил., 8 пр.

КАТАЛИТИЧЕСКИЙ ФИЛЬТР САЖИ ДЛЯ ОБРАБОТКИ ВЫХЛОПНОГО ГАЗА ДВИГАТЕЛЯ КОМПРЕССИОННОГО ВОСПЛАМЕНЕНИЯ

Изобретение относится к выхлопной системе для двигателя компрессионного воспламенения, содержащей каталитический фильтр сажи. Указанный каталитический фильтр сажи содержит катализатор окисления для обработки монооксида углерода (CO) и углеводородов (HC) в выхлопном газе из двигателя компрессионного воспламенения, при этом указанный катализатор окисления размещен на фильтрующей подложке, которая представляет собой фильтр с проточными стенками. При этом указанный катализатор окисления содержит: первую зону, содержащую компонент на основе металла платиновой группы (PGM), выбираемый из группы, состоящей из платинового (Pt) компонента, палладиевого (Pd) компонента и их сочетания; компонент на основе щелочноземельного металла, содержащий магний (Mg), кальций (Ca), стронций (Sr), барий (Ba) или сочетание двух или более из них; и материал-носитель, содержащий оксид алюминия, легированный диоксидом кремния, при этом указанный оксид алюминия легирован диоксидом кремния в количестве от 0,5 до 15% ...

АДСОРБЕР-КАТАЛИЗАТОР NOx

Изобретение относится к катализатору-ловушке обедненных NOx, содержащему: i) первый слой, причем указанный первый слой содержит смесь или сплав платины и палладия, первый неорганический оксид, который выбран из группы, состоящей из оксида алюминия и диоксида кремния-оксида алюминия, активатор, где данный активатор содержит барий, и материал, абсорбирующий углеводороды, причем материал, абсорбирующий углеводороды, является бета-цеолитом; и ii) второй слой, причем указанный второй слой содержит один или несколько металлов платиновой группы, материал, способный к аккумулированию кислорода (OSC), где указанный OSC выбран из группы, состоящей из оксида церия, и смешанного оксида церия-диоксида циркония, и второй неорганический оксид, причем указанный второй неорганический оксид выбран из группы, состоящей из оксида алюминия и сложного оксида лантана/оксида алюминия; где первый слой по существу не содержит материала, способного к аккумулированию кислорода (OSC), и где второй слой нанесен на первый ...

КОМПОЗИТЫ КАТАЛИЗАТОРОВ ОКИСЛЕНИЯ ДИЗЕЛЬНОГО ТОПЛИВА

... 1. Композит катализатора окисления для снижения выбросов отработавшего газа двигателя, работающего на обедненных смесях, содержащий:подложку носителя, которая имеет протяженность, входной конец и выходной конец, каталитический материал катализатора окисления на подложке, при этом каталитический материал катализатора окисления включает нижний слой покрытия из пористого оксида и верхний слой покрытия из пористого оксида;при этом нижний слой покрытия из пористого оксида включает подложку из тугоплавкого оксида металла, платиновый (Pt) компонент и палладиевый (Pd) компонент в массовом соотношении Pt к Pd в диапазоне, который составляет приблизительно 4:1-1:4; иверхний слой покрытия из пористого оксида включает цеолит, Pt и подложку из тугоплавкого оксида металла, верхний слой покрытия из пористого оксида в основном не содержит палладий, при этом композит катализатора окисления является эффективным для уменьшения углеводорода и монооксида углерода, и окисляет NO до NOв выхлопных газах двигателя ...

КАТАЛИЗАТОР ДЛЯ ОБРАБОТКИ ВЫХЛОПНОГО ГАЗА

... 1.Состав катализатора, включающийа. цеолитный материал, имеющий структуру с малыми порами и мольным отношением оксида кремния к окиси алюминия от около 10 до около 30;b. от примерно 1,5 до примерно 5 вес.% обмениваемого неалюминиевого переходного металла, из расчета общего веса цеолита; ис. по меньшей мере, примерно 1,35 вес.% серия, из расчета общего веса цеолита, при том, что упомянутый церий присутствует в виде, выбранном из обмениваемых ионов церия, мономерной окиси церия, олигомерной окиси церия и их сочетания, при условии, что упомянутая олигомерная окись церия имеет размер частицы меньше, чем 5 мкм.2. Катализатор по п. 1, в котором композиция содержит от примерно 2 до примерно 3,5 вес.% обмениваемого неалюминиевого переходного металла, из расчета общего веса цеолита.3. Катализатор по п. 1, в котором композиция содержит от примерно 2 до примерно 2,5 вес.% обмениваемого неалюминиевого переходного металла, из расчета общего веса цеолита.4. Катализатор по п. 1, в котором неалюминиевым ...

ПОКРЫТИЕ ДЛЯ ВОССТАНОВЛЕНИЯ ОКСИДОВ АЗОТА

... 1. Каталитическое покрытие для применения в качестве гидролитического катализатора (Г-катализатора) для восстановления оксидов азота, отличающееся тем, что в качестве соединения, адсорбирующего HNCO и оксиды азота, Г-катализатор содержит лантан и дополнительно содержит одно или несколько соединений, являющееся или являющихся щелочным и/или щелочно-земельным металлом, и/или иттрием, и/или гафнием, и/или празеодимом, и/или галлием, и/или цирконием.2. Каталитическое покрытие по п. 1, отличающееся тем, что Г-катализатор содержит каталитическое покрытие на основе диоксида титана, предпочтительно в форме анатаза, на основе SiO, на основе цеолита, предпочтительно ZSM-5 и/или в бета форме, и/или на основе двуокиси циркония.3. Каталитическое покрытие по п. 1 или 2, отличающееся тем, что Г-катализатор содержит восстановитель, являющийся мочевиной и/или восстановитель, включающий NHгруппу (i=1-4).4. Каталитическое покрытие по п. 1, отличающееся тем, что Г-катализатор содержит соединение, адсорбирующее ...

МОНОЛИТНАЯ ПОДЛОЖКА С КАТАЛИЗАТОРОМ SCR

... 1. Монолитная подложка, имеющая длину L и включающая первую зону, по существу, постоянной длины, ограничиваемую на одном конце первым концом монолитной подложки, при этом, первая зона содержит катализатор селективного каталитического восстановления (SCR), предназначенный для восстановления оксидов азота азотистым восстановителем в выхлопном газе, выбрасываемом двигателем внутреннего сгорания, и вторую зону, по существу, постоянной длины, меньше L, ограничиваемую на одном конце вторым концом монолитной подложки, при этом, вторая зона содержит (а) по меньшей мере, один оксид металла в форме частиц или смесь любых двух или более оксидов металлов, предназначенных для улавливания газофазного металла платиновой группы (PGM), при этом указанный, по меньшей мере, один оксид металла в форме частиц не выполняет функцию подложки для какого-либо другого каталитического компонента; или (b) компонент, способный улавливать и/или сплавляться с газофазным PGM.2. Монолитная подложка по п. 1, в которой, по ...

КАТАЛИЗАТОР ДЛЯ УДАЛЕНИЯ ОКСИДОВ АЗОТА ИЗ ОТРАБОТАВШИХ ГАЗОВ ДИЗЕЛЬНЫХ ДВИГАТЕЛЕЙ

... 1. Катализатор для удаления оксидов азота из отработавших газов (ОГ) дизельных двигателей, состоящий из носителя длиной L и каталитически активного покрытия из одной или нескольких материальных зон, содержащих- цеолит или цеолитоподобное соединение, содержащий/содержащее медь в количестве от 1 до 10 мас.% в пересчете на всю его массу и выбранный/выбранное из группы, включающей шабазит, SAPO-34, ALPO-34 и β-цеолит, и- по меньшей мере одно соединение, выбранное из группы, включающей оксид бария, гидроксид бария, карбонат бария, оксид стронция, гидроксид стронция, карбонат стронция, оксид празеодима, оксид лантана, оксид магния, смешанный оксид магния и алюминия, оксид щелочного металла, гидроксид щелочного металла, карбонат щелочного металла и их смеси.2. Катализатор по п. 1, отличающийся тем, что цеолит, соответственно цеолитоподобное соединение, имеет средний размер пор менее 4 ангстрем и выбран/выбрано из группы, включающей шабазит, SAPO-34 и ALPO-34.3. Катализатор по п. 1 или 2, отличающийся ...

ПАССИВНЫЙ АДСОРБЕНТ NOx, СОДЕРЖАЩИЙ БЛАГОРОДНЫЙ МЕТАЛЛ И МЕЛКОПОРИСТОЕ МОЛЕКУЛЯРНОЕ СИТО

Изобретение относится к очистке выхлопных газов. Предложен пассивный адсорбент NO, эффективный для адсорбции NOпри температуре 200°С или ниже и для высвобождения адсорбированного NOпри температурах выше указанной температуры. Заявленные пассивный адсорбент NOсодержит благородный металл и мелкопористое молекулярное сито, имеющее максимальный размер кольца в восемь тетраэдрических атомов. Предложена также выхлопная система двигателя внутреннего сгорания и способ снижения содержания оксидов азота в выхлопном газе. Изобретение обеспечивает эффективную очистку от оксидов азота. 3 н. и 11 з.п. ф-лы, 4 табл., 5 пр.

КАТАЛИЗАТОР ОКИСЛЕНИЯ ДЛЯ ОБРАБОТКИ ВЫХЛОПНЫХ ГАЗОВ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к катализирующей монолитной основе, содержащей окислительный катализатор на монолитной основе для применения при обработке выхлопных газов, выпускаемых из двигателя внутреннего сгорания, работающего на обедненных топливных смесях. Данная катализирующая монолитная основа содержит первое покрытие из пористого оксида, имеющее длину L, и второе покрытие из пористого оксида, где второе покрытие из пористого оксида расположено в виде слоя поверх первого покрытия из пористого оксида на протяжении по меньшей мере части длины L, где первое покрытие из пористого оксида включает композицию катализатора, содержащую платину, и по меньшей мере один материал-носитель для платины, где второе покрытие из пористого оксида включает композицию катализатора, содержащую как платину, так и палладий, и по меньшей мере один материал-носитель для платины и палладия, и где массовое отношение платины к палладию во втором покрытии из пористого оксида составляет <2, причем массовое отношение Pt ...

КИСЛОТНЫЙ КАТАЛИЗАТОР АРОМАТИЗАЦИИ С УЛУЧШЕННОЙ АКТИВНОСТЬЮ И СТАБИЛЬНОСТЬЮ

Настоящее изобретение относится к способам получения катализаторов на носителе и, в частности, касается получения катализаторов ароматизации на носителе, содержащих переходной металл и связанное цеолитное основание, с использованием стадии пропитки катализатора, на которой присутствуют высокие загрузки хлора. Описан катализатор на носителе для риформинга углеводородного сырья содержит: связанное цеолитное основание; от 0,3 мас.% до 3 мас.% платины; от 1,8 мас.% до 4 мас.% хлора; и от 0,4 мас.% до 1,5 мас.% фтора, из расчета на общую массу катализатора на носителе; где катализатор на носителе характеризуется пиковой температурой восстановления на кривой температурно-программируемого восстановления (ТПВ) в диапазоне от 580°F до 800°F, где связанное цеолитное основание содержит K/L-цеолит и связующе на основе кремнезема. Способ риформинга углеводородного сырья включает приведение в контакт углеводородного сырья с катализатором ароматизации на носителе в условиях риформинга в реакторной системе ...

ЦЕЛОИТНЫЕ МАТЕРИАЛЫ ТИПА СНА И СПОСОБЫ ИХ ПОЛУЧЕНИЯ С ИСПОЛЬЗОВАНИЕМ КОМБИНАЦИЙ ЦИКЛОАЛКИЛ- И ТЕТРААЛКИЛАММОНИЕВЫХ СОЕДИНЕНИЙ

КАТАЛИЗАТОР ОКИСЛЕНИЯ, СОДЕРЖАЩИЙ СОЕДИНЕНИЕ СЕРЫ

ОКИСЛИТЕЛЬНЫЙ КАТАЛИЗАТОР И СИСТЕМА ВЫПУСКА ВЫХЛОПНЫХ ГАЗОВ ДЛЯ ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

ЗОНИРОВАННЫЙ КАТАЛИЗАТОР ДЛЯ ОБРАБОТКИ ОТРАБОТАВШЕГО ГАЗА

ВЫХЛОПНАЯ СИСТЕМА С МОДИФИЦИРОВАННОЙ ЛОВУШКОЙ NOX В УСЛОВИЯХ ОБЕДНЕННОЙ СМЕСИ

КАТАЛИЗАТОР ДЛЯ ХОЛОДНОГО ПУСКА И ЕГО ПРИМЕНЕНИЕ В ВЫХЛОПНЫХ СИСТЕМАХ

... 1. Катализатор для холодного пуска, содержащий: (1) цеолитовый катализатор, содержащий неблагородный металл, благородный металл, и цеолит; и (2) катализатор с нанесенным металлом платиновой группы, содержащий один или несколько металлов платиновой группы и один или несколько носителей из неорганических оксидов.2. Катализатор для холодного пуска по п. 1, в котором неблагородный металл выбран из группы, состоящей из железа, меди, марганца, хрома, кобальта, никеля, олова и их смесей.3. Катализатор для холодного пуска по п. 1, в котором неблагородным металлом является железо.4. Катализатор для холодного пуска по п. 1, в котором благородный металл выбран из группы, состоящей из платины, палладия, родия и их смесей.5. Катализатор для холодного пуска по п. 1, в котором благородным металлом является палладий.6. Катализатор для холодного пуска по п. 1, в котором цеолит выбран из группы, состоящей из бета-цеолита, фожазита, L-цеолита, ZSM-цеолита, SSZ-цеолита, морденита, шабазита, оффретита, эрионита ...

МОДУЛИ И СПОСОБЫ ПОДГОТОВКИ ТОПЛИВА

... 1. Модуль подготовки топлива для обработки сгораемого топлива перед сжиганием, включающий:корпус, имеющий впускной и выпускной концы и определяющий сквозной канал для топлива между ними; ивставной блок подготовки топлива, расположенный в сквозном канале, таким образом, что топливо, протекающее в канале между впускным и выпускным концами корпуса, вступает в контакт с блоком подготовки топлива, причемвставной блок подготовки топлива включает:(i) массу каталитических металлических элементов, которые составляет каталитический металл;(ii) массу твердого полимерного каталитического материала в форме пластинок, диспергированных в массе каталитических металлических материалов, причем пластинки из твердого полимерного каталитического материала составляют полимерный связующий материал и каталитическую смесь твердых частиц цеолита и твердых частиц редкоземельного металла или оксида металла, смешанных в твердом полимерном связующем материале.2. Модуль подготовки топлива по п.1, дополнительно включающий ...

МНОГОФУНКЦИОНАЛЬНЫЕ ФИЛЬТРЫ ДЛЯ РЕГУЛИРОВАНИЯ ВЫБРОСОВ ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

АЛЮМОСИЛИКАТНОЕ ИЛИ СИЛИКОАЛЮМОФОСФАТНОЕ МОЛЕКУЛЯРНОЕ СИТО/ОКТАЭДРИЧЕСКОЕ МОЛЕКУЛЯРНОЕ СИТО НА ОСНОВЕ МАРГАНЦА В КАЧЕСТВЕ КАТАЛИЗАТОРОВ ДЛЯ ОБРАБОТКИ ВЫХЛОПНЫХ ГАЗОВ

КАТАЛИТИЧЕСКИЕ СИСТЕМЫ ДЛЯ СЕЛЕКТИВНОГО КАТАЛИТИЧЕСКОГО ВОССТАНОВЛЕНИЯ

КАТАЛИЗАТОР ОКИСЛЕНИЯ ДЛЯ ОБРАБОТКИ ВЫХЛОПНОГО ГАЗА ДВИГАТЕЛЯ С ВОСПЛАМЕНЕНИЕМ ОТ СЖАТИЯ

КАТАЛИЗАТОР СКВ, ДОПУСКАЮЩИЙ ПЕРЕДОЗИРОВКУ NH3

КАТАЛИЗАТОР ОБРАБОТКИ ПРОСКОЧИВШЕГО АММИАКА

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 ...

КАТАЛИТИЧЕСКИЕ КОМПОЗИЦИИ МОЛЕКУЛЯРНОГО СИТА, КАТАЛИТИЧЕСКИЕ КОМПОЗИТЫ, СИСТЕМЫ, И СПОСОБЫ

АДСОРБЕР-КАТАЛИЗАТОР NOx

КАТАЛИЗАТОРЫ ЖИДКОСТНОГО КАТАЛИТИЧЕСКОГО КРЕКИНГА ДЛЯ ПОВЫШЕНИЯ ВЫХОДОВ БУТИЛЕНА

КАТАЛИТИЧЕСКИЙ ФИЛЬТР С ПРОТОЧНЫМИ СТЕНКАМИ, СНАБЖЕННЫЙ МЕМБРАНОЙ

СПОСОБ ПРИГОТОВЛЕНИЯ КАТАЛИЗИРОВАННОГО ФИЛЬТРА ТВЕРДЫХ ЧАСТИЦ И ФИЛЬТРА ТВЕРДЫХ ЧАСТИЦ

... 1. Способ приготовления катализированного фильтра с проточной фильтрующей стенкой, который включает в себя следующие этапы:а) обеспечение корпуса фильтра с проточной фильтрующей стенкой со множеством продольных впускных проточных каналов и выпускных проточных каналов, разделенных газопроницаемыми пористыми перегородками;б) нанесение пористого оксидного покрытия катализатора, содержащего композицию первого катализатора, который является активным при реакции оксидов азота с оксидом углерода и водородом с получением аммиака, и композицию второго катализатора, который является активным при селективном восстановлении оксидов азота посредством реакции с аммиаком с получением азота, при этом композиция первого катализатора имеет модальный размер частиц больше, чем средний диаметр пор пористых перегородок, и композиция второго катализатора имеет модальный размер частиц меньше, чем средний диаметр пор пористых перегородок;в) нанесение на корпус фильтра пористого оксидного покрытия катализатора посредством ...

VERFAHREN ZUR HERSTELLUNG VON MOLEKULARSIEBSCHICHTEN

VERFAHREN ZUM AUFTRAGEN VON MOLEKULARSIEBEKRISTALLEN AUF EINEN TRÄGER UND DER DAMIT ERHALTENE BESCHICHTETE TRÄGER

SCR-Katalysator mit verbesserter Haftung

Die vorliegende Erfindung betrifft eine in der selektiven katalytischen Reduktion von Stickoxiden aktive katalytische Zusammensetzung, enthaltend einen Zeolith vom Typ MFI und einen Zeolith vom Typ BEA, wobei die gewichtsmittlere Teilchengröße d50 des Zeoliths vom Typ MFI und des Zeoliths vom Typ BEA unterschiedlich ist, ein Verfahren zur Herstellung eines SCR-Katalysators, sowie den damit hergestellten SCR-Katalysator.

Abgasreinigungskatalysator und Herstellungsverfahren dafür

Dieser Katalysator umfasst eine untere katalytische Schicht 2 mit einer katalytischen Fähigkeit, HC und CO zu oxidieren, und eine obere katalytische Schicht 3 mit einer katalytischen Fähigkeit, NOx zu reduzieren. Die untere katalytische Schicht 2 enthält Pt und Pd, die als katalytische Metalle dienen, Zeolith, ein Ce-haltiges Oxid und aktiviertes Aluminiumoxid, und die obere katalytische Schicht 3 enthält aktiviertes Aluminiumoxid, das ein Rh-dotiertes Ce-haltiges Oxid lädt, und ein NOx-Speichermaterial.

In Zonen aufgeteilter katalysierter Substratmonolith

Beschrieben wird ein in Zonen aufgeteilter katalysierter Substratmonolith, der eine erste Zone und eine zweite Zone umfasst, wobei die erste Zone und die zweite Zone axial in Reihe angeordnet sind, wobei die erste Zone ein auf einen Träger geladenes Platingruppenmetall und ein erstes Oxid eines unedlen Metalls, das aus der Gruppe ausgewählt ist, die aus Eisenoxid, Manganoxid, Kupferoxid, Zinkoxid, Nickeloxid und Gemischen hiervon besteht, oder ein erstes unedles Metall, das aus der Gruppe ausgewählt ist, die aus Eisen, Mangan, Kupfer, Zink, Nickel und Gemischen hiervon besteht, das auf ein anorganisches Oxid geladen ist, umfasst und die zweite Zone auf einen Zeolith geladenes Kupfer oder Eisen und ein zweites Oxid eines unedlen Metalls, das aus der Gruppe ausgewählt ist, die aus Eisenoxid, Manganoxid, Kupferoxid, Zinkoxid, Nickeloxid und Gemischen hiervon besteht, oder ein zweites unedles Metall, das aus der Gruppe ausgewählt ist, die aus Eisen, Mangan, Kupfer, Zink, Nickel und Gemischen ...

Structured selective catalytic reduction-catalyst, useful for removing nitrogen oxide in exhaust gas, comprises catalytically active material zones of iron-exchanged zeolite and transition metal-exchanged zeolite

Structured selective catalytic reduction (SCR)-catalyst, for the removal of nitrogen oxide in the exhaust gas of combustion motors using ammonia or ammonia decomposable compound as reducing agents, comprises several catalytically active material zones, which are optionally applied with a catalytically inert supporting body and are contacted by the exhaust fumes temporally after each other. Structured selective catalytic reduction (SCR)-catalyst, for the removal of nitrogen oxide in the exhaust gas of combustion motors using ammonia or ammonia decomposable compound as reducing agents, comprises several catalytically active material zones, which are optionally applied with a catalytically inert supporting body and are contacted by the exhaust fumes temporally after each other; where the material zone is characterized by different turnover sections of the SCR-reaction, the turnover sections of the material zone contacted first by the exhaust gas that can be cleaned lies at higher temperature ...

Katalysator und Verfahren zur Reinigung von Abgasen

Durch Zeolith unterstützter, auf Silber basierender Katalysator zur Speicherung von NOx

Ein Nachbehandlungssystem verwendet chemische Reaktionen, um einen Abgasfluss zu behandeln. Eine Vorrichtung zur Verwendung innerhalb eines Nachbehandlungssystems schließt einen auf Silber basierenden NOx-Speicherkatalysator und einen Zeolithen ein. Der auf Silber basierende NOx-Speicherkatalysator und der Zeolith speichern NOx während einer Niedertemperatur-Betriebsanlaufperiode. In einer Ausführung schließt der Zeolith einen Barium-Y-Zeolithen ein.

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 ...

Oxidationskatalysator für einen magerverbrennenden Verbrennungsmotor

Vorrichtung, die einen mager verbrennenden Verbrennungsmotor, ein Motormanagementmittel und ein Abgassystem zur Behandlung von Abgas des Motors umfasst, wobei das Abgassystem einen ersten Oxidationskatalysator umfasst, der auf einem ersten Wabenmonolithsubstrat angeordnet ist, wobei der erste Oxidationskatalysator auf einem ersten Metalloxidträger geträgertes Platin, der mindestens ein reduzierbares Oxid umfasst, umfasst, wobei der erste Oxidationskatalysator im Wesentlichen frei von Alkalimetallen und Erdalkalimetallen ist, wobei das Motormanagementmittel so angeordnet ist, dass es, wenn es sich in Gebrauch befindet, intermittierend die lambda-Zusammensetzung des mit dem ersten Oxidationskatalysator in Berührung gelangenden Abgases auf eine fette lambda-Zusammensetzung moduliert.

MOLEKULARSIEBE UND VERFAHREN ZU IHRER HERSTELLUNG

Oxidation catalyst for a lean burn internal combustion engine

Disclosed is a lean-burn internal combustion engine, engine management means and an exhaust system for treating exhaust gas of the engine. The exhaust system comprises an oxidation catalyst disposed on a honeycomb monolith substrate, the catalyst comprising platinum supported on a first metal oxide support, the metal oxide support comprising at least one reducible oxide. The oxidation catalyst is substantially free of alkali metals and alkaline earth metals. The engine management means is arranged to intermittently modulate the air to fuel ratio or lambda composition of the exhaust gas entering the first oxidation catalyst to a fuel rich or low lambda composition and the rich engine mode is used to purge the NOx catalyst. The oxidation catalyst may be a diesel oxidation catalyst.

Diesel oxidation catalyst and exhaust system

Process for producing a catalyst and catalyst article

Exhaust system for a compression ignition engine having a capture face for volatilised platinum

Exhaust system for a vehicular positive ignition internal combustion engine

Exhaust system for a lean-burn internal combustion engine including SCR catalyst

Catalysed substrate monolith and its use in an exhaust system for a lean burn IC engine

Non-PGM ammonia slip catalyst

Core-shell catalysts and absorbents

Active inorganic composites are disclosed which have a core-shell structure which comprises a particulate inorganic core and a shell layer comprising a plurality of inorganic shell particles. The composites may be manufactured by methods utilizing charge reversal to ensure that inorganic particulate material of the shell layer is attracted and bonded to the core particle. The materials find use as catalysts and adsorbents and separation media. The core may be a zeolite and the shell layer may be a zeolite or a mixed metal oxide such as a perovskite.

Catalysed substrate monolith

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 for a compression ignition engine

Cold start catalyst and its use in exhaust systems

Oxidation catalyst for a compression ignition engine

An oxidation catalyst for treating an exhaust gas from a compression ignition engine is disclosed. The catalyst consists of a substrate, a first washcoat region with palladium (Pd) and a first support material containing cerium oxide, and a second washcoat region comprising platinum (Pt) and a second support material. The second washcoat region may also contain palladium, where the mass of Pt may be greater than the mass of Pd. The second support material may comprise a refractory metal oxide such as alumina, silica, titania, zirconia, ceria or mixed or composite oxides. The second washcoat region may be disposed on the substrate, downstream of the first washcoat region. Alternatively the first washcoat later may be disposed or supported on the second washcoat layer. The first washcoat region palladium content may be less than 2% by weight, and preferably between 0.25 and 1.9 %. In the second washcoat region the platinum may br between 0.2 to 15 % by weight. Further aspects include an exhaust ...

Bi-metal molecular sieve catalysts

Catalyst composition comprising a small pore molecular sieve, 0.5-5 weight percent of copper and/or iron (Tm), based on total molecular sieve weight, and 0.5-5 wt% nickel, wherein the Tm:Ni ratio is between 10:1 and 1:2. The nickel and copper/iron may be incorporated in to the sieve during synthesis and a majority of them may be present as extra-framework metals. The sieve may have a CHA or AEI framework, and may be a zeolite having a silica to alumina ratio of 10:50. The framework may be essentially free of non-aluminium metals. Included is a method of synthesis a molecular sieve comprising heating an admixture of sources of silica, alumina, copper and/or iron, nickel, at least one structure directing agent and optionally a phosphate to form zeolites and then separating the sieves from the mother liquor. Claims are also present for a catalytic article comprising a substrate coated with the composition, a method and system for treating exhaust gas using the composition and a method for ...

Diesel oxidation catalyst having a capture region for exhaust gas impurities

An oxidation catalyst, such as a diesel oxidation catalyst (DOC), for treating an exhaust gas produced by a diesel engine comprises a substrate 1, a capture material 2 for capturing at least one phosphorus containing impurity and/or at least one sulphur containing impurity in the exhaust gas, and a catalytic region 3 disposed on the substrate. The catalytic region comprises a catalytic material comprising platinum (Pt) and/or palladium (Pd). The capture material may be a molecular sieve comprising a base metal, such as at least one of iron (Fe), copper (Cu) and nickel (Ni). The capture material and catalytic region may be provided in layers, with the capture layer disposed on the catalytic layer. The capture material may be provided in a zone on the catalytic layer or substrate, preferably at an inlet end of the substrate. Alternatively the capture material may be provided on an inlet end surface of the substrate. The catalytic region may comprise first and second catalytic layers or zones ...

SCR catalyst

A copper CHA framework zeolite catalyst composition, comprising a zeolite with a CHA framework, a molar silica-to-alumina ratio (SAR) of at least 40, and an atomic copper-to-aluminium ratio of at least 1.25 is disclosed. Also disclosed, is a method and a system for treating an exhaust gas containing NOx with the catalyst composition.

Passive NOx adsorber

Method of oxidizing excess CO in an exhaust gas

Zoned catalysed substrate monolith

Method of treating atmospheric pollutants

Catalytic filter having a soot-catalyst and an SCR catalyst

A catalytic filter is provided having a mixture of an SCR catalyst and a soot catalyst (CSF). The soot oxidation catalyst is a copper doped ceria, iron doped ceria or manganese doped ceria. The copper (Cu) doped ceria, iron (Fe) doped ceria or manganese (Mn) doped ceria, may also be doped with zirconia (zr) or zirconia and praseodymium (Pr) or zirconia and neodymium (Nd) or zirconia, praseodymium and neodymium. A further additional metal oxide may also be provided.

Exhaust system comprising CO slip catalyst

NOx adsorber Catalyst

Ammonia slip catalyst

Oxidation catalyst for a diesel engine exhaust

Coating a monolith substrate with catalyst component

Zeolite promoted v/ti/w catalysts

Provided is a catalyst composition for treating exhaust gas comprising a blend of a first component and second component, wherein the first component is an aluminosilicate or ferrosilicate molecular sieve component wherein the molecular sieve is either in H+ form or is ion exchanged with one or more transition metals, and the second component is a vanadium oxide supported on a metal oxide support selected from alumina, titania, zirconia, ceria, silica, and combinations thereof. Also provided are methods, systems, and catalytic articles incorporating or utilizing such catalyst blends.

Catalyst for treating exhaust gas

Provided is a catalyst composition having an aluminosilicate molecular sieve having an AEI structure and a mole ratio of silica-to-alumina of about 20 to about 30 loaded with about 1 to about 5 weight percent of a promoter metal, based on the total weight of the molecular sieve material. Also provided are method, articles, and systems utilizing the catalyst composition.

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.

Ammonia slip catalyst

A catalyst article for treating an exhaust gas comprising: a substrate; a first oxidation catalyst layer disposed on and/or within the substrate; a second catalyst layer, which selectively reduces NOx and/or stores NH3, coated or disposed over the first catalyst layer; and a third catalyst layer, which comprises a second oxidation catalyst consisting of supported palladium, coated or disposed upstream of the first and second catalyst layers, and wherein the first and second oxidation catalysts are different formulations. The third layer can be essentially free of ruthenium, rhenium, rhodium, silver, osmium, iridium, platinum, gold, alkali and alkaline earth metals, and transition metals, except transition metals in the form of a metal oxide particle support for the Pd and the second layer can be essentially free of Ag, Au, Pt, Rh, Ru, Ir and Os. The first oxidation catalyst is preferably a supported noble metal and can be Pt or a Pt and Pd mixture supported on metal oxide particles. The ...

Selective catalytic reduction catalyst

A selective catalytic reduction catalyst composition for converting oxides of nitrogen (NOx) in an exhaust gas comprises a mixture of a first component and a second component, wherein the first component is an admixture of the H-form of an aluminosilicate mordenite zeolite (MOR) and the H-form of an aluminosilicate chabazite zeolite (CHA); and the second component is a vanadium oxide supported on a metal oxide support, which comprises titania, silica-stabilized titania or a mixture of titania and silica-stabilized titania. The weight ratio of the first component to the second component is 10:90 to 25:75. The metal oxide may also comprise tungsten oxide. The composition can comprise a binder e.g. clay, alumina and/or glass fibres and the weight ratio of the two components to the binder may be 80:20 to 95:5. The vanadium oxide can comprise iron vanadate and may be present as 0.5-5wt% V2O5. The composition may be a washcoat comprising fillers, binders, processing aids, water and dopants and ...

Oxidation catalyst for a compression ignition engine and a method of preperation therefor

Exhaust system

Passive NOx adsorber

Molecular sieve catalyst for treating exhaust gas

Selective catalytic reduction catalyst

Diesel oxidation catalyst and exhaust system

Selective catalytic reduction catalyst

Oxidation catalyst for a diesel engine exhaust

Composite, zoned oxidation catalyst for a compression ignition internal combustion engine

POROUS PLANAR FORMATION AND SUBSTRATE WITH POROUS ONE (N) PLANAR FORMATION (N) FOR the TREATMENT OF EXHAUST GASES OF COMBUSTION ENGINES

Gas treatment by catalytic ozone oxidation

In one embodiment, a catalyst for ozone oxidation of pollutant components dispersed in a gas is provided. The ozone oxidation catalyst has a porous body formed from a metal body, a ceramic, or polymeric fibers coated with metal. A catalytic noble metal composition is deposited on the surface of the porous body. The catalytic noble metal composition is formed from particles of a noble metal supported by a mesoporous molecular sieve.

Small pore molecular sieve supported copper catalysts durable against lean/rich aging for the reduction of nitrogen oxides

A method of using a catalyst comprises exposing a catalyst to at least one reactant in a chemical process. The catalyst comprises copper and a small pore molecular sieve having a maximum ring size of eight tetrahedral atoms. The chemical process undergoes at least one period of exposure to a reducing atmosphere. The catalyst has an initial activity and the catalyst has a final activity after the at least one period of exposure to the reducing atmosphere. The final activity is within 30% of the initial activity at a temperature between 200 and 500° C.

Oxidation catalyst for a lean burn internal combustion engine

An apparatus is disclosed. The apparatus comprises a lean-burn internal combustion engine, engine management means and an exhaust system for treating exhaust gas of the engine. The exhaust system comprises a first oxidation catalyst disposed on a first honeycomb monolith substrate. The first oxidation catalyst comprises platinum supported on a first metal oxide support comprising at least one reducible oxide, and is substantially free of alkali metals and alkaline earth metals. The engine management means is arranged, when in use, intermittently to modulate the lambda composition of the exhaust gas entering the first oxidation catalyst to a rich lambda composition.

Method for Transforming Nitrogen-Containing Compounds

The invention relates to a method for the selective catalytic transformation of nitrogen-containing compounds. The transformation relates to the selective catalytic reduction (SCR) of nitrogen oxides, or the selective catalytic oxidation (SCO) of nitrogen hydrides and nitrogen-containing organic compounds, preferably in waste gas flows of combustion processes with motors and without motors and industrial applications. The catalytic converter comprises a titano-(silico)-alumo-phosphate.

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).

Exhaust gas purifying catalyst and exhaust gas purification method using same

A catalyst that is not only capable of efficiently treating CO even at a low exhaust gas temperature, but also capable of exerting favorable CO purification efficiency in a low-temperature exhaust gas even in a case of being exposed for a long time to an engine exhaust gas that is a high temperature and contains HC, CO, NOx, water vapor and the like; and an exhaust gas treatment technique are described. The catalyst for purifying exhaust gas contains: a noble metal; an oxide containing as a base material A at least two kinds of elements selected from the group consisting of aluminum, zirconium and titanium; and an oxide containing as a base material B at least one kind of element selected from the group consisting of silicon, cerium, praseodymium and lanthanum; in which the base material A and the base material B satisfy a specific formula.

CATALYST COMBINING PLATINUM GROUP METAL WITH COPPER-ALUMINA SPINEL

An oxidation catalyst composition is provided, the composition including at least one platinum group metal impregnated onto a porous alumina material, wherein the porous alumina material comprises a copper-alumina spinel phase. At least a portion of the copper-alumina spinel phase can be proximal to, or in direct contact with, at least one platinum group metal crystallite, such as a crystallite having a size of about 1 nm or greater. The close proximity of the copper-alumina spinel phase to the platinum group metal crystallite is believed to provide synergistic enhancement of carbon monoxide oxidation. Methods of making and using the catalyst composition are also provided, as well as emission treatment systems comprising a catalyst article coated with the catalyst composition. 1. An oxidation catalyst composition , the composition comprising at least one platinum group metal impregnated onto a porous alumina material , wherein the porous alumina material comprises a copper-alumina spinel phase.2. The oxidation catalyst composition of claim 1 , wherein at least one portion of the copper-alumina spinel phase is proximal to claim 1 , or in direct contact with claim 1 , at least one platinum group metal crystallite.3. The oxidation catalyst composition of claim 2 , wherein at least one portion of the copper-alumina spinel phase is proximal to claim 2 , or in direct contact with claim 2 , at least one platinum group metal crystallite having a crystallite size of about 1 nm or greater.4. The oxidation catalyst composition of claim 3 , wherein at least one portion of the copper-alumina spinel phase is proximal to claim 3 , or in direct contact with claim 3 , at least one platinum group metal crystallite having a crystallite size of about 50 nm or greater.5. The oxidation catalyst composition of claim 2 , wherein the at least one portion of the copper-alumina spinel phase is within about 50 nm of the at least one platinum group metal crystallite.6. The oxidation catalyst ...

BI-METAL MOLECULAR SIEVE CATALYSTS

Provided is a catalyst composition comprising a small pore molecular sieve, about 0.5-5 weight percent of a transition metal (T) selected from copper and/or iron, based on the total weight of the zeolite, and about 0.5-5 weight percent nickel, based on the total weight of the molecular sieve, wherein the transition metal and nickel are present in a T:Ni ratio of about 10:1 to about 1:2. Also provided is a synthesis method for preparing a small pore molecular sieve having both Cu and Ni incorporated in situ. Also provided is a method for using such a catalyst for selectively reducing NOx in an exhaust gas. 1. A catalyst composition comprising a small pore molecular sieve , about 0.5-5 weight percent of a transition metal (T) selected from copper and/or iron , based on the total weight of the molecular sieve , and about 0.5-5 weight percent nickel , based on the total weight of the molecular sieve , wherein the transition metal and nickel are present in a T:Ni ratio of about 10:1 to about 1:2.2. The catalyst composition of claim 1 , wherein the transition metal and the nickel are incorporated into the molecular sieve during synthesis.3. The catalyst composition of claim 1 , wherein a majority of the transition metal and the nickel are present as extra-framework metals.4. The catalyst composition of claim 1 , wherein the molecular sieve is composed of crystals claim 1 , and the transition metal and the nickel are present in a weight percentage as measured by XPS that is within 10% of their weight percentage as measured by XRF5. The catalyst composition of claim 1 , wherein the molecular sieve has a CHA framework.6. The catalyst composition of claim 1 , wherein the molecular sieve has an AEI framework.7. The catalyst composition of claim 1 , wherein the molecular sieve is a zeolite having a silica-to-alumina ratio of about 10 to about 50.8. The catalyst composition of claim 1 , wherein the molecular sieve is essentially free of non-aluminum framework metals.9. The ...

Nano-sized functional binder

Described are catalytic articles comprising a substrate having a washcoat on the substrate, the washcoat containing a catalytic component having a first average (D50) particle size and a functional binder component having a second average (D50) particle size in the range of about 10 nm to about 1000 nm, wherein the ratio of the first average (D50) particle size to the second average (D50) particle size is greater than about 10:1. The catalytic articles are useful in methods and systems to purify exhaust gas streams from an engine.

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 ...

Nano-sized functional binder

Described are catalytic articles comprising a substrate having a washcoat on the substrate, the washcoat containing a catalytic component having a first average (D50) particle size and a functional binder component having a second average (D50) particle size in the range of about 10 nm to about 1000 nm, wherein the ratio of the first average (D50) particle size to the second average (D50) particle size is greater than about 10:1. The catalytic articles are useful in methods and systems to purify exhaust gas streams from an engine.

Compositions for Passive NOx Adsorption (PNA) Systems and Methods of Making and Using Same

The present disclosure relates to a substrate containing passive NOadsorption (PNA) materials for treatment of gases, and washcoats for use in preparing such a substrate. Also provided are methods of preparation of the PNA materials, as well as methods of preparation of the substrate containing the PNA materials. More specifically, the present disclosure relates to a coated substrate containing PNA materials for PNA systems, useful in the treatment of exhaust gases. Also disclosed are exhaust treatment systems, and vehicles, such as diesel or gasoline vehicles, particularly light-duty diesel or gasoline vehicles, using catalytic converters and exhaust treatment systems using the coated substrates. 1225-. (canceled)226. A vehicle comprising:a catalytic converter comprising a Passive NOx Adsorber (PNA) layer comprising nano-sized platinum group metal (PGM) on a plurality of support particles comprising cerium oxide, wherein the amount of cerium oxide in the PNA layer is from about 50 g/L to about 400 g/L.227. The vehicle of claim 226 , wherein the plurality of support particles are micron-sized or the plurality of support particles are nano-sized.228. The vehicle of claim 226 , wherein the plurality of support particles further comprise zirconium oxide claim 226 , lanthanum oxide claim 226 , yttrium oxide claim 226 , or a combination thereof.229. The vehicle of claim 228 , wherein the plurality of support particles comprise HSA5 claim 228 , HSA20 claim 228 , or a mixture thereof.230. The vehicle of claim 226 , wherein the nano-sized PGM on the plurality of support particles comprise composite nano-particles claim 226 , wherein the composite nano-particles comprise a support-nanoparticle and a PGM nano-particle.231. The vehicle of claim 230 , wherein the composite nano-particles are bonded to micron-sized carrier particles to form nano-on-nano-on-micro (NNm) particles.232. The vehicle of claim 230 , wherein the composite nano-particles are embedded within carrier ...

Coating for reducing nitrogen oxides

A catalyst coating for use in a hydrolysis catalyst (H-catalyst) for the reduction of nitrogen oxides, a manufacturing method for such a coating, a catalyst structure and its use are described. The H-catalyst includes alkaline compounds, which are capable of adsorbing HNCO and/or nitrogen oxides and which include alkali and alkaline earth metals, lanthanum and/or yttrium and/or hafnium and/or prasedium and/or gallium, and/or zirconium for promoting reduction, such as for promoting the hydrolysis of urea and the formation of ammonia and/or the selective reduction of nitrogen oxides.

Methods Utilizing Non-Zeolitic Metal-Containing Molecular Sieves Having The CHA Crystal Structure

Catalysts comprising metal-loaded non-zeolitic molecular sieves having the CHA crystal structure, including Cu-SAPO-34, and methods for treating exhaust gas incorporating such catalysts are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stability at high reaction temperatures. 119-. (canceled)20. A catalyst comprising:an ion-exchanged Cu-SAPO-34 non-zeolitic molecular sieve having a CHA crystal structure; wherein the Cu content of the Cu-SAPO-34 non-zeolitic molecular sieve on a CuO basis is in the range of about 1% to about 5% by weight;{'sup': '2', 'wherein the Cu-SAPO-34 non-zeolitic molecular sieve has a BET surface area greater than 350 m/g;'}{'sub': 2', '2', '2', '3, 'sup': 3', '−1, 'wherein the catalyst is effective to promote the reaction of ammonia with nitrogen oxides (NOx) to form nitrogen and HO selectively in an exhaust gas stream at 200° C. when the catalyst has been deposited on a honeycomb substrate having a cell density of 400 cpsi at a loading between 2 and 2.5 g/inand tested at a space velocity of 80,000 hrwhere the feed stream comprises a mixture of 10% O, 5% HO, 500 ppm NO and 500 ppm NHto provide at least 80% NOx conversion; and'}{'sub': '2', 'wherein the catalyst is effective to make less than 5 ppm NO over a temperature range of 200° C. to 450° C.'}21. The catalyst of claim 20 , wherein the Cu-SAPO-34 non-zeolitic molecular sieve has a BET surface area in the range of 375 m/g to 600 m/g.22. The catalyst of claim 20 , wherein the Cu-SAPO-34 non-zeolitic molecular sieve contains a secondary metal.23. The catalyst of claim 22 , wherein the secondary metal comprises zirconium.24. The catalyst of claim 20 , wherein the Cu content of the Cu-SAPO-34 non-zeolitic molecular sieve on a CuO basis is in the range of about 2% to 4 by weight.25. The catalyst of claim 20 , wherein the catalyst is effective to provide at least about 85% NOx conversion in the ...

CATALYSTS FOR ENHANCED REDUCTION OF NOx GASES AND PROCESSES FOR MAKING AND USING SAME

Cu-exchanged zeolite catalysts with a chabazite structure containing selected concentrations of alkali ions or alkaline-earth ions and a lower concentration of (Cu) ions are described and a sequential process for making. Catalysts of the present invention reduce light-off temperatures providing enhanced low-temperature conversion of NOx gases. Catalysts of the present invention also exhibit high selectivity values compared to conventional NOx reduction catalysts. 1. A modified NOx reduction catalyst that contains less than 2 percent copper metal by weight in a synthetic chabazite zeolite incorporating at least one material selected from the group consisting of Na , Li , K and Ca and provides a light off temperature less than 175° C. , the catalyst produced by the process of:fabricating a synthetic chabazite zeolite in sodium form;exchanging the sodium therein with NH4+ ions forming a NH4-exchanged chabazite zeolite;{'sup': +', '++, 'exchanging the NH4+ ions in the NH4-exchanged chabazite zeolite with a single alkali or alkaline-earth element and calcining same to secure the alkali or alkaline-earth element in active sites therein forming a fully alkali (A) or alkaline-earth (AE)-exchanged chabazite zeolite;'}exchanging a quantity of the alkali or alkaline-earth element in the alkali (A+) or alkaline-earth (AE++)-exchanged chabazite zeolite with copper to obtain a loading of copper metal above zero percent to at or below 2 percent by weight therein; and hydrothermally aging the copper-exchanged chabazite zeolite to stabilize the catalyst.2. A process for fabricating a modified NOx reduction catalyst that provides a light off temperature less than 175° C. , the process comprising:fabricating a synthetic chabazite zeolite in sodium form;exchanging the sodium therein with NH4+ ions forming a NH4-exchanged chabazite zeolite;{'sup': +', '++, 'exchanging the NH4+ ions in the NH4-exchanged chabazite zeolite with a single alkali or alkaline-earth element and calcining same ...

STABILIZED METAL-EXCHANGED SAPO MATERIAL

Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant. 116-. (canceled)17. A process for stabilizing a selective catalytic reduction catalyst material comprising a SAPO material and an exchanged metal , the process comprising:exposing the SAPO material to dry ammonia; andion exchanging the SAPO material with a metal salt to provide a stabilized SAPO material.18. The process of claim 17 , wherein the metal of the metal salt is selected from the group consisting of Cu claim 17 , Fe claim 17 , Co claim 17 , Ce and Ni.19. The process of claim 18 , wherein the metal comprises copper.20. The process of claim 19 , wherein the SAPO material comprises SAPO-34.21. The process of claim 17 , wherein the stabilized SAPO material comprises a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites.22. The process according to claim 21 , wherein the plurality of substitutional sites includes less than 5% Si(0Al) sites.23. The process according to claim 21 , wherein the plurality of substitutional sites includes less than 1% Si(0Al) sites.24. The process according to claim 17 , wherein the SAPO material has a structure type selected from the group consisting of AEI claim 17 , AFT claim 17 , AFX claim 17 , CHA claim 17 , EAB claim 17 , ERI claim 17 , KFI claim 17 , LEV claim 17 , SAS claim 17 , SAT claim 17 , and SAV.25. The process according to claim 24 , wherein the SAPO material has the CHA structure type.26. The process according to claim 25 , wherein the SAPO material is selected from the group consisting of SAPO-34 claim 25 , SAPO-44 claim 25 , and SAPO-47.27. The process according to claim 17 , wherein the ...

Exhaust Gas Purifying Catalyst

This exhaust gas purifying catalyst is provided with a substrate and a catalyst layer formed on a surface of the substrate. The catalyst layer contains zeolite particles that support a metal, and a rare earth element-containing compound that contains a rare earth element. The rare earth element-containing compound is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite is 0.001 to 0.014 in terms of oxides. 1. An exhaust gas purifying apparatus which is disposed in an exhaust pathway of an internal combustion engine and cleans exhaust gas emitted from the internal combustion engine , the apparatus comprising:an exhaust gas purifying catalyst comprising a substrate and a catalyst layer formed on a surface of the substrate, anda reducing agent supply mechanism which supplies a reducing agent for generation of ammonia to the exhaust gas at a position upstream in the exhaust pathway as compared to a position of the exhaust gas purifying catalyst, whereinthe catalyst layer contains zeolite particles that support a metal and that support a rare earth element-containing compound that contains lanthanum (La) as a rare earth element, andan amount of the rare earth element-containing compound contained is such an amount that a molar ratio of the rare earth element relative to Si contained in the zeolite particles is 0.001 to 0.014 in terms of oxides, whereinthe rare earth element-containing compound is disposed on a surface of the zeolite particles.2. The exhaust gas purifying apparatus according to claim 1 , wherein a relationship between an average particle diameter D1 of the zeolite particles and an average particle diameter D2 of the rare earth element-containing compound satisfies the following formula: 0.005<(D2/D1)<0.5.3. The exhaust gas purifying apparatus according to claim 1 , wherein an average particle diameter D2 of the rare earth element-containing compound is 100 nm or less.4. The exhaust gas purifying ...

Exhaust Gas Purifying Catalyst

This exhaust gas purifying catalyst is provided with a substrate and a catalyst layer formed on a surface of the substrate. The catalyst layer contains zeolite particles that support a metal, and a rare earth element-containing compound that contains a rare earth element. The rare earth element-containing compound is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite is 0.001 to 0.014 in terms of oxides. 1. A catalyst body which is used in an exhaust gas purifying catalyst , the catalyst body comprising:zeolite particles;a metal supported on the zeolite particles; anda rare earth element-containing compound disposed on a surface of the zeolite particles, whereinthe rare earth element-containing compound contains lanthanum (La) as a rare earth element, andan amount of the rare earth element-containing compound is such an amount that a molar ratio of the rare earth element relative to Si contained in the zeolite particles is 0.001 to 0.014 in terms of oxides.21221. The catalyst body according to claim 1 , wherein a relationship between an average particle diameter D of the zeolite particles and an average particle diameter D of the rare earth element-containing compound satisfies the following formula: 0.005<(D/D)<0.5.32. The catalyst body according to claim 1 , wherein an average particle diameter D of the rare earth element-containing compound is 100 nm or less.4. The catalyst body according to claim 1 , wherein when an amount of the rare earth element at a cross section of a zeolite particle is measured using an Electron Probe Micro Analyzer (EPMA) claim 1 , the amount of the rare earth element present at the surface of the zeolite particle is greater than the amount of the rare earth element present in the inner part of the zeolite particle.5. The catalyst body according to claim 1 , wherein the rare earth element-containing compound contains at least one of lanthanum oxide and lanthanum hydroxide.6. The ...

INTEGRATED SCR AND AMMONIA OXIDATION CATALYST SYSTEMS

A catalyst containing a washcoat including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and a physical mixture or a chemical combination or an atomically doped combination thereof is described. A catalyst containing a first washcoat zone substantially free of platinum group metal and including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms; and a second washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum or platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and a physical mixture or a chemical combination or an atomically doped combination thereof is provided. A method and a system for treating emissions using the catalyst are also described. 1. A catalyst for oxidizing ammonia , the catalyst comprising:a washcoat including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum or platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and a physical mixture or a chemical combination or an atomically doped combination thereof.2. The catalyst of claim 1 , wherein the washcoat is disposed on a monolithic substrate.3. The catalyst of claim 2 , wherein the monolithic substrate is a flow-through honeycomb substrate comprising a plurality of fine claim 2 , substantially parallel gas flow passages extending along a longitudinal axis of the substrate.4. The catalyst of claim 1 , wherein the catalyst contains platinum and rhodium.5. The catalyst of claim 4 , wherein{'sup': 3', '3', '3', '3, 'platinum is present in an amount in a range ...

EXHAUST SYSTEM FOR A COMPRESSION IGNITION ENGINE COMPRISING A WATER ADSORBENT MATERIAL

An exhaust system for a compression ignition engine comprising: a water adsorbent material; and a catalyst composition for treating an exhaust gas pollutant produced by the compression ignition engine; wherein the water adsorbent material is: (i) arranged to contact exhaust gas from the compression ignition engine before the catalyst composition; and (ii) in thermal communication with the catalyst composition. 120-. (canceled)21. A diesel engine exhaust system comprising an oxidation catalyst , wherein the oxidation catalyst comprises:a water adsorbent material;a catalyst composition for treating an exhaust gas pollutant produced by the diesel engine, wherein the catalyst composition comprises a platinum group metal (PGM) and a support material, wherein the platinum group metal (PGM) comprises platinum; anda substrate;wherein the catalyst composition and the water adsorbent material is each disposed on the substrate, wherein a first washcoat layer comprising the water adsorbent material is disposed on a second washcoat layer comprising the catalyst composition such that the water adsorbent material is arranged to contact exhaust gas from the diesel engine before the catalyst composition.22. A diesel engine exhaust system according to claim 21 , wherein the water adsorbent material comprises a zeolite.23. A diesel engine exhaust system according to claim 22 , wherein the zeolite has a silica to alumina ratio (SAR) of 100:1 to 8:1.24. A diesel engine exhaust system according to claim 22 , wherein the zeolite has a pore size of from 3 Å to 15 Å.25. A diesel engine exhaust system according to claim 22 , wherein the zeolite is be selected from the group consisting of faujasite claim 22 , clinoptilolite claim 22 , mordenite claim 22 , silicalite claim 22 , ferrierite claim 22 , zeolite X claim 22 , zeolite Y claim 22 , ultrastable zeolite Y claim 22 , beta zeolite claim 22 , AEI zeolite claim 22 , ZSM-5 zeolite claim 22 , ZSM-12 zeolite claim 22 , ZSM-20 zeolite claim 22 ...

DIESEL OXIDATION CATALYST CONTAINING MANGANESE

The present invention relates to a diesel oxidation catalyst, which comprises a carrier body having a length L extending between a first end face a and a second end face b and a catalytically active material zone A arranged on the carrier body, wherein the material zone A contains palladium and platinum on a manganese-containing carrier oxide, wherein the carrier oxide consists of a carrier oxide component A and a carrier oxide component B and the carrier oxide component B consists of manganese and/or a manganese compound and is present in an amount of 5 to 15 wt. %, calculated as MnOand based on the total weight of the manganese-containing carrier oxide. 1. A diesel oxidation catalyst , which comprises a carrier body having a length L extending between a first end face a and a second end face b and a catalytically active material zone A arranged on the carrier body , wherein the material zone A contains palladium and platinum supported on a manganese-containing carrier oxide , wherein the manganese-containing carrier oxide consists of carrier oxide component A and a carrier oxide component B and the carrier oxide component B consists of manganese and/or a manganese compound and is present in an amount of 5 to 15 wt. % , calculated as MnOand based on the total weight of the manganese-containing carrier oxide.2. Diesel oxidation catalyst according to claim 1 , wherein the carrier oxide component A is selected from the series consisting of aluminum oxide claim 1 , doped aluminum oxide claim 1 , silicon oxide claim 1 , titanium dioxide and mixed oxides containing one or more of said oxides.3. Diesel oxidation catalyst according to claim 1 , wherein the carrier oxide component A is doped aluminum oxide.4. Diesel oxidation catalyst according to claim 1 , wherein the carrier oxide component A is a mixed oxide comprising aluminum oxide and silicon oxide or a silicon-oxide-doped aluminum oxide.5. Diesel oxidation catalyst according to claim 1 , wherein claim 1 , the carrier ...

Structurally enhanced cracking catalysts

A cracking catalyst contains a substantially inert core and an active shell, the active shell containing a zeolite catalyst and a matrix. Methods of making and using the cracking catalyst are also described.

CuCHA MATERIAL FOR SCR CATALYSIS

The present invention relates to a catalyst material which is capable, at high temperatures, of converting nitrogen oxides in exhaust gas, particularly from vehicles driven by lean-running internal combustion engines, in the presence of ammonia into harmless nitrogen. 1. A CuCHA zeolite material having:{'sub': 2', '2', '3, 'i) a molar SiO:AlOratio (SAR) of >10 to <15;'}ii) Cu:Al ratios of >0.25 to <0.35, andiii) an average crystal size between 0.75 and 2 μm.2. A CuCHA zeolite material according to claim 1 , wherein the molar SiO:AlOratio (SAR) is 12 claim 1 , 13 or 14.3. A CuCHA zeolite material according to claim 1 , wherein the Cu:Al ratio is >0.25 to <0.31.4. A CuCHA zeolite material according to claim 1 , wherein the molar SiO:AlOratio (SAR) is 12 claim 1 , 13 or 14 and the Cu:Al ratio is >0.26 to <0.31.5. A CuCHA zeolite material according to claim 1 , wherein claim 1 , the Cu in the form of a salt with the anion of an organic acid has been used for ion exchange.6. A CuCHA zeolite material according to claim 1 , wherein claim 1 , its stability begins to wane only above 800° C. (as measured by the relative intensity of the [100] peak (XRD)).7. Catalyst for the catalytic reduction of nitrogen oxides in the presence of ammonia comprising the material according to .8. A catalyst system comprising the catalyst according to claim 7 , wherein claim 7 , this catalyst is present on a supporting body together with a catalyst for ammonia oxidation.9. A method of reducing nitrogen oxides with ammonia claim 1 , comprising utilizing the material according to in a catalyst that is placed in contract with nitrogen oxides in the presence of ammonia.10. Method for preparing a CuCHA zeolite material according to claim 1 , wherein claim 1 , the CHA zeolite material is synthesized in the NH form and is subsequently converted into the H form before the copper exchange takes place.11. A method of forming a catalyst suited for reducing nitrogen oxides with ammonia claim 1 , comprising ...

ZONE COATED CATALYTIC SUBSTRATES WITH PASSIVE NOX ADSORPTION ZONES

Disclosed are methods of forming zone coated substrates for use in catalytic converters, as well as washcoat compositions and methods suitable for using in preparation of the zone coated substrates, and the zone coated substrates formed thereby. The zone coated substrates can include a Passive NOAdsorption zone and a catalytic zone. Also disclosed are exhaust treatment systems, and vehicles, such as diesel vehicles, using catalytic converters and exhaust treatment systems using the zone coated substrates. 1. A coated substrate comprising: the first zone comprising a Passive NOx Adsorber (PNA) layer comprising nano-sized platinum group metal (PGM) on a plurality of support particles comprising cerium oxide; and', 'the second zone comprising a first catalytic layer comprising a first composite nanoparticle, wherein the first composite nanoparticle comprises a first catalytic nanoparticle on a first support nanoparticle., 'a substrate comprising a first zone and a second zone;'}2. The coated substrate of claim 1 , wherein the first composite nanoparticle is plasma created.3. (canceled)4. The coated substrate of claim 1 , wherein the first composite nanoparticle is bonded to a micron-sized carrier particle to form a first NNm particle.5. The coated substrate of claim 1 , wherein the first composite nanoparticle is embedded within carrier particles to form a first NNiM particle.6. The coated substrate of claim 1 , wherein the second zone further comprises a second catalytic layer comprising a second composite nanoparticle claim 1 , wherein the second composite nanoparticle comprises a second catalytic nanoparticle on a second support nanoparticle.78-. (canceled)9. The coated substrate of claim 1 , wherein the first claim 1 , second claim 1 , or first and second catalytic nanoparticles comprise platinum and palladium.1012-. (canceled)13. The coated substrate of claim 1 , wherein the second zone further comprises a zeolite layer comprising zeolite particles.14. The coated ...

Exhaust gas purifying catalyst

This exhaust gas purifying catalyst is provided with a substrate 10 and a catalyst layer 20 formed on a surface of the substrate 10 . The catalyst layer 20 contains zeolite particles 22 that support a metal, and a rare earth element-containing compound 24 that contains a rare earth element. The rare earth element-containing compound 24 is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite 22 is 0.001 to 0.014 in terms of oxides.

SCR Catalyst Having Improved Adhesion Of The Zeolite-Containing Catalytic Layer

The invention relates to: a catalytic composition that is active in the selective catalytic reduction of nitric oxides, containing an iron-containing MFI-type zeolite and an iron-containing BEA-type zeolite, wherein the weight average particle size d50 of the MFI-type zeolite and the BEA-type zeolite is different; a method for producing an SCR catalyst; and the SCR catalyst produced in this way. The adhesion of the coating is improved in that the weight average particle sizes of the MFI-type and BEA-type zeolites are different. 1. A catalytic composition comprising an iron-containing MFI-type zeolite and an iron-containing BEA-type zeolite , wherein the weight-average particle sizes d50 of the zeolites are different.2. A catalytic composition as claimed in claim 1 , wherein the weight-average particle sizes d50 of the zeolites differ by at least 0.5 μm.3. A catalytic composition as claimed in claim 1 , wherein the weight-average particle sizes d50 of the zeolites differ by at least 2 μm.4. A catalytic composition as claimed in claim 1 , wherein the BEA-type zeolite has a weight-average particle size d50 in the range from 0.1 to 3 μm and the MFI-type zeolite has a weight-average particle size d50 in the range from 2 to 10 μ.5. A catalytic composition as claimed in claim 1 , wherein the BEA-type zeolite has a weight-average particle size d50 in the range from 0.2 to 2 μm.6. A catalytic composition as claimed in claim 1 , wherein the MFI-type zeolite has a weight-average particle size d50 in the range from 4 to 8 μm.7. A catalytic composition as claimed in claim 1 , wherein the weight ratio of the MFI-type zeolite to the BEA-type zeolite is in the range of 1:10 to 10:1.8. A catalytic composition as claimed in claim 1 , wherein the MFI-type zeolite comprises iron in amounts by weight of 0.7 to 4.9 wt % claim 1 , based on the weight of the iron-containing MFI-type zeolite claim 1 , and the BEA-type zeolite comprises iron in amounts by weight of 0.3 to 3.9 wt % claim 1 , ...

Copper cha zeolite catalysts

Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

Co slip catalyst and method of using

A CO slip catalyst, for treating an exhaust gas from a lean burn internal combustion engine, is disclosed. The CO slip catalyst comprises palladium and a ceria-containing material. The invention also includes a method for oxidizing excess CO in an exhaust gas, wherein the excess CO results from the periodic contact of an upstream catalyst under rich exhaust conditions. The method comprises contacting the excess CO in the exhaust gas with a CO slip catalyst at a temperature in the range of 100 to 700° C.

Low-Temperature Oxidation Catalyst With Particularly Marked Hydrophobic Properties For The Oxidation Of Organic Pollutants

The present invention relates to a catalyst comprising a macroporous noble metal-containing zeolite material and a porous SiO-containing binder, wherein the catalyst has a proportion of micropores of more than 70%, based on the total pore volume of the catalyst. The invention is additionally directed to a process for preparing the catalyst and to the use of the catalyst as an oxidation catalyst. 19.-. (canceled)10. Method of producing a catalyst according to , comprising the following steps:a) introducing a noble metal precursor compound into a microporous zeolite material;b) calcining the zeolite material loaded with the noble metal precursor compound;{'sub': '2', 'c) mixing the zeolite material loaded with the noble metal compound with a porous SiO-containing binder and a solvent;'}d) drying and calcining the mixture comprising the zeolite material loaded with the noble metal compound and the binder.11. Method according to claim 10 , wherein the mixture obtained in step c) is applied to a support.12. (canceled) The present invention relates to a catalyst comprising a microporous noble metal-containing zeolite material and a porous SiO-containing binder, wherein the catalyst has a proportion of micropores of more than 70%, relative to the total pore volume of the catalyst. The invention is additionally directed to a method of producing the catalyst as well as to the use of the catalyst as oxidation catalyst.Purifying exhaust gases by means of catalysts has been known for some time. For example, the exhaust gases from combustion engines are purified with so-called three-way catalysts (TWC). The nitrogen oxides are reduced with reductive hydrocarbons (HC) and carbon monoxide (CO).Likewise, the exhaust gases from diesel engines are post-treated with catalysts. Here, carbon monoxide, unburnt hydrocarbons, nitrogen oxides and soot particles, for example, are removed from the exhaust gas. Unburnt hydrocarbons which are to be treated catalytically include paraffins, ...

PARTICLE FILTER HAVING SCR-ACTIVE COATING

The invention relates to a particle filter, which comprises a wall flow filter and two SCR-catalytically active materials A and B which are different from each other, wherein the SCR-catalytically active material A contains a zeolite of the chabazite structure type, which contains ion-exchanged iron and/or copper, and the SCR-catalytically active material B contains a zeolite of the levyne structure type, which contains ion-exchanged iron and/or copper, wherein (i) the SCR-catalytically active materials A and B are in the form of two material zones A and B, wherein material zone A extends from the first end of the wall flow filter at least over part of the length L and material zone B extends from the second end of the wall flow filter at least over part of the length L, or wherein (ii) the wall flow filter is formed by the SCR-catalytically active material A or B and a matrix component and the SCR-catalytically active material B or A extends at least over part of the length L of the wall flow filter in the form of a material zone B or A. 1. Particle filter that comprises a wall flow filter and two SCR-catalytically active materials A and B which are different from each other ,wherein the wall flow filter comprises channels of length L which extend in parallel between a first end and a second end of the wall flow filter, which are alternately sealed in a gas-tight manner either at the first end or at the second end and which are separated by porous walls; the SCR-catalytically active material A contains a zeolite of the chabazite structure type which contains ion-exchanged iron and/or copper and the SCR-catalytically active material B contains a zeolite of the levyne structure type which contains ion-exchanged iron and/or copper, wherein(i) the SCR-catalytically active materials A and B are present in the form of two material zones A and B, wherein material zone A extends from the first end of the wall flow filter at least over a part of the length L and material ...

Diesel oxidation catalyst with nox adsorber activity

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 washcoat region disposed on a substrate, wherein the washcoat region comprises: palladium (Pd), gold (Au) and a support material, wherein the palladium (Pd) and gold (Au) are supported on the support material; and a molecular sieve catalyst, wherein the molecular sieve catalyst comprises a noble metal and a molecular sieve.

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 ...

Acidic Aromatization Catalyst with Improved Activity and Stability

Methods for producing supported catalysts containing a transition metal and a bound zeolite base are disclosed. These methods employ a step of impregnating the bound zeolite base with the transition metal, fluorine, and high loadings of chlorine. The resultant high chlorine content supported catalysts have improved catalyst activity in aromatization reactions. 1. A supported catalyst comprising:a bound zeolite base;from about 0.3 wt. % to about 3 wt. % of a transition metal;from about 1.8 wt. % to about 4 wt. % of chlorine; andfrom about 0.4 wt. % to about 1.5 wt. % of fluorine, based on the total weight of the supported catalyst;wherein the supported catalyst is characterized by a peak reduction temperature on a Temperature Programmed Reduction curve in a range from about 580° F. to about 800° F.2. The catalyst of claim 1 , wherein the bound zeolite base comprises from about 5 wt. % to about 30 wt. % of a binder claim 1 , based on the total weight of the bound zeolite base.3. The catalyst of claim 1 , wherein:the bound zeolite base comprises a silica-bound K/L-zeolite;the transition metal comprises platinum; anda weight ratio of chlorine:fluorine is in a range from about 2:1 to about 5:1.4. The catalyst of claim 1 , wherein the supported catalyst comprises:from about 0.5 wt. % to about 2 wt. % of platinum;from about 2.2 wt. % to about 3.4 wt. % of chlorine; andfrom about 0.5 wt. % to about 1.1 wt. % of fluorine.5. The catalyst of claim 4 , wherein the supported catalyst is characterized by a peak reduction temperature on a Temperature Programmed Reduction curve in a range from about 600° F. to about 720° F.6. The catalyst of claim 1 , wherein the supported catalyst has a total nitrogen content that is greater than that of a catalyst having from 0.3 wt. % to 1.5 wt. % chlorine claim 1 , under the same catalyst preparation conditions.7. The catalyst of claim 1 , wherein the supported catalyst is characterized by a Temperature Programmed Reduction curve comprising a ...

Manganese-Containing Diesel Oxidation Catalyst

An oxidation catalyst composite, methods, and systems for the treatment of exhaust gas emissions from a diesel engine are described. More particularly, an oxidation catalyst composite including a first washcoat comprising a zeolite, Pt, and first refractory metal oxide support containing manganese, a second washcoat comprising a second refractory metal oxide support, a Pt component and a Pd component, and a third washcoat comprising palladium and a rare earth oxide component is described. 1. An oxidation catalyst composite for abatement of exhaust gas emissions from a lean burn engine comprising:a carrier substrate having a length, an inlet end and an outlet end, an oxidation catalyst catalytic material on the carrier, the oxidation catalyst catalytic material comprising:a first washcoat including a zeolite, Pt, and a first refractory metal oxide support containing Mn;a second washcoat including a second refractory metal oxide support, a platinum (Pt) component and a palladium (Pd) component in a ratio of Pt:Pd in the range of about 10:1 to 1:10; anda third wash coat comprising palladium and a rare earth oxide component, the third washcoat being substantially free of platinum;{'sub': '2', 'wherein the oxidation catalyst composite is effective to abate hydrocarbon and carbon monoxide, and to oxidize NO to NOin the lean burn engine exhaust.'}2. The oxidation catalyst composite of claim 1 , wherein the first washcoat further comprises a palladium component claim 1 , and the Pt:Pd ratio of the first washcoat is in the range of 1:0 to 10:1.3. The oxidation catalyst composite of claim 1 , wherein the first wash coat is substantially free of palladium.4. The oxidation catalyst composite of claim 2 , wherein the palladium component is present in an amount in the range of about 0.1 g/ftto about 10 g/ft.5. The oxidation catalyst composite of claim 1 , wherein the Mn content of the first washcoat is in the range of 0.1% to 20% by weight.6. (canceled)7. The oxidation catalyst ...

ULTRASOUND-ASSISTED METHOD FOR PRODUCING AN SCR CATALYTIC CONVERTER

The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results in a smaller particle size of the catalytically active material used. 1. Method for producing a catalytic converter containing zeolites or zeotypes for the aftertreatment of exhaust gases of a car engine ,characterized in thatprior to coating onto and/or into a support, the zeolite or zeotype is treated by means of ultrasound in such a way that the particle size thereof is largely reduced to less than 20 μm (d50).2. Method according to claim 1 ,characterized in thatthe zeolites or zeotypes are those derived from structure types selected from the group consisting of the CHA, LEV, AEI, AFX, AFI, or KFI framework, or a mixture thereof.3. Method according to claim 1 ,characterized in thatthe zeolite or zeotype is exchanged with iron and/or copper ions.4. Method according to claim 1 ,characterized in thatthe coating comprises a binder selected from the group consisting of aluminum oxide, titanium dioxide, zirconium dioxide, silicon dioxide, or mixtures thereof.5. Method according to claim 1 ,characterized in thatthe support is a wall-flow filter.6. Method according to claim 1 ,characterized in thatthe particle size (d99) is lowered to below 7 μm.7. Method according to claim 1 ,characterized in thatthe ultrasound is used with an amplitude of 5 to 100 μm.8. Method according to claim 1 ,characterized in thatthe ultrasound has a frequency of 5 to 30 kHz.9. Method according to claim 1 ,characterized in thatthe ultrasound has a power of 500 to 50000 watts.10. Method according to claim 1 ,characterized in thatthe coating suspension is supplied to a pre-drying step after the coating of the support.11. Catalytic converter for the aftertreatment of exhaust gases of a car engine claim 1 , produced according to .12. Catalytic converter according to claim 11 , ...

Oxidation catalyst for hydrocarbons produced by an internal combustion engine

An oxidation catalyst is described for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a region disposed on a substrate, wherein the region comprises ruthenium (Ru) supported on a support material comprising a refractory oxide.

CATALYST AND METHOD FOR PREPARING CATALYST

A catalyst includes LTA zeolite including copper ions, wherein a Si/Al ratio of the LTA zeolite is 2 to 50. The catalyst is coated on a honeycomb carrier or a filter. The catalyst removes NOx from a reaction gas at 100° C. or above. The catalyst has an NOx conversion rate of 80% at 450° C. or above. 1. A method for manufacturing a catalyst , comprising steps of:preparing a LTA zeolite of which a Si/Al ratio is 2 or more;preparing LTA zeolite containing ions by using the LTA zeolite; andpreparing a copper-type of LTA zeolite by performing copper ion exchange on the ion-containing LTA zeolite.2. The method of claim 1 , wherein a Si/Al ratio of the LTA zeolite is 2 to 50.3. The method of claim 1 , wherein the step of preparing the ion-containing LTA zeolite comprises substituting ions in the LTA zeolite.4. The method of claim 1 , wherein the step of preparing the ion-containing LTA zeolite comprises adding the LTA zeolite to an ammonium salt for reaction and then drying the LTA zeolite claim 1 , and{'sub': 4', '3, 'wherein the ammonium salt is ammonium nitrate (NHNO).'}5. The method of claim 1 , wherein the step of performing copper ion exchanging on the ion-containing LTA zeolite comprises adding the ion-containing LTA zeolite to a copper precursor solution and stirring the solution.6. The method of claim 1 , further comprising thermally treating the copper type of LTA zeolite after the preparing of the copper-type LTA zeolite claim 1 ,wherein the thermal treatment is performed at a temperature ranging from 1 to 30° C./min from 400 to 750° C.7. The method of claim 1 , wherein the step of preparing the LTA zeolite having the Si/Al ratio of 2 or more comprises preparing the LTA zeolite using an LTA seed.8. A method for manufacturing a catalyst claim 1 , comprising steps of:preparing an LTA zeolite of which a Si/Al ratio is 2 or more;preparing an LTA zeolite containing ions using the LTA zeolite; andpreparing an iron type of LTA zeolite by performing iron (Fe) ion ...

COMPOSITIONS FOR PASSIVE NOX ADSORPTION (PNA) SYSTEMS AND METHODS OF MAKING AND USING SAME

The present disclosure relates to a substrate containing passive NOadsorption (PNA) materials for treatment of gases, and washcoats for use in preparing such a substrate. Also provided are methods of preparation of the PNA materials, as well as methods of preparation of the substrate containing the PNA materials. More specifically, the present disclosure relates to a coated substrate containing PNA materials for PNA systems, useful in the treatment of exhaust gases. Also disclosed are exhaust treatment systems, and vehicles, such as diesel or gasoline vehicles, particularly light-duty diesel or gasoline vehicles, using catalytic converters and exhaust treatment systems using the coated substrates. 167-. (canceled)68. A method of treating an exhaust gas , comprising:{'sub': 'x', 'claim-text': a substrate; and', 'a PNA layer comprising nano-sized PGM on a plurality of support particles comprising cerium oxide., 'contacting a coated substrate with an exhaust gas comprising NOemissions, wherein the coated substrate comprises6999-. (canceled)100. A method of forming a coated substrate comprising:coating the substrate with a washcoat composition comprising nano-sized palladium or ruthenium on a plurality of support particles comprising cerium oxide.101140-. (canceled)141. A vehicle comprising:a catalytic converter comprising a PNA layer comprising nano-sized PGM on a plurality of support particles comprising cerium oxide, wherein the vehicle complies with the European emission standard Euro 5.142225-. (canceled) This application claims priority benefit of U.S. Provisional Patent Application No. 61/969,035, filed Mar. 21, 2014, U.S. Provisional Patent Application No. 61/985,388, filed Apr. 28, 2014, and United State Provisional Patent Application No. 62/121,444, filed Feb. 26, 2015. The entire contents of those applications are hereby incorporated by reference herein.The present disclosure relates to the field of catalysts. More specifically, the present disclosure relates ...

Low-temperature oxidation catalyst with particularly marked hydrophobic properties for the oxidation of organic pullutants

The present invention relates to a catalyst comprising a macroporous noble metal-containing zeolite material and a porous SiO 2 -containing binder, wherein the catalyst has a proportion of micropores of more than 70%, based on the total pore volume of the catalyst. The invention is additionally directed to a process for preparing the catalyst and to the use of the catalyst as an oxidation catalyst.

OXIDATION CATALYST FOR INTERNAL COMBUSTION ENGINE EXHAUST GAS TREATMENT

The invention provides an exhaust gas cleaning oxidation catalyst and in particular to an oxidation catalyst for cleaning the exhaust gas discharged from internal combustion engines of compression ignition type (particularly diesel engines). The invention further relates to a catalysed substrate monolith comprising an oxidising catalyst on a substrate monolith for use in treating exhaust gas emitted from a lean-burn internal combustion engine. In particular, the invention relates to a catalysed substrate monolith comprising a first washcoat coating and a second washcoat coating, wherein the second washcoat coating is disposed in a layer above the first washcoat coating. 1. An oxidation catalyst for the oxidative treatment of a hydrocarbon (HC) and carbon monoxide (CO) in an exhaust gas , the oxidation catalyst comprising a supporting substrate and a plurality of catalyst layers supported on the supporting substrate , wherein the plurality of catalyst layers comprise a washcoat material , an active metal and a hydrocarbon adsorbent , and wherein one catalyst layer lies on a catalyst surface layer side and one or more other catalyst layers lie on a side between the said one catalyst layer and the supporting substrate; and wherein:(a) the amount of hydrocarbon adsorbent in the said one catalyst layer is greater than the amount of hydrocarbon adsorbent in the said one or more other catalyst layers, and the concentration of active metal in the said one catalyst layer is the same as or less than the concentration of active metal in the said one or more other catalyst layers; or(b) the amount of hydrocarbon adsorbent in the said one catalyst layer is the same as the amount of hydrocarbon adsorbent in the said one or more other catalyst layers, and the concentration of active metal in the said one catalyst layer is less than the concentration of active metal in the said one or more other catalyst layers.2. An oxidation catalyst according to claim 1 , wherein the hydrocarbon ...

EXHAUST SYSTEM

An exhaust system for an internal combustion engine, the exhaust system comprising, a lean NOtrap, a NOstorage and reduction zone on a wall flow monolithic substrate having a pre-coated porosity of 50% or greater, the NOstorage and reduction zone comprising a platinum group metal loaded on one or more first support, the or each first support comprising one or more alkaline earth metal compound, and a selective catalytic reduction zone on a monolithic substrate, the selective catalytic reduction zone comprising copper or iron loaded on a second support, the second support comprising a molecular sieve. 1. An exhaust system for an internal combustion engine , the exhaust system comprising ,{'sub': 'x', 'a. a lean NOtrap,'}{'sub': x', 'x, 'b. a NOstorage and reduction zone on a wall flow monolithic substrate having a pre-coated porosity of 50% or greater, the NOstorage and reduction zone comprising a platinum group metal loaded on one or more first support, the or each first support comprising one or more alkaline earth metal compound, and'}c. a selective catalytic reduction zone on a monolithic substrate, the selective catalytic reduction zone comprising copper or iron loaded on a second support, the second support comprising a molecular sieve.2. An exhaust system according to claim 1 , wherein the NOx storage and reduction zone is on a first wall flow monolithic substrate and the selective catalytic reduction zone is on a second monolithic substrate.3. An exhaust system according to claim 1 , wherein the NOstorage and reduction zone and the selective catalytic reduction zone are each on portions of the same wall flow monolithic substrate.4. An exhaust system according to claim 3 , wherein the NOstorage and reduction zone is disposed in channels of the wall flow monolithic substrate from one end thereof and the selective catalytic reduction zone is disposed in channels of the wall flow monolithic substrate from the other end thereof.5. An exhaust system according to ...

CATALYST HAVING SCR-ACTIVE COATING

The invention relates to a catalyst, which comprises a catalyst substrate of the length L and two SCR-catalytically active materials A and B, wherein the SCR-catalytically active material A contains a zeolite of the levyne structure type, which contains ion-exchanged iron and/or copper, and the SCR-catalytically active material B contains a zeolite of the chabazite structure type, which contains ion-exchanged iron and/or copper, wherein (i) the SCR-catalytically active materials A and B are in the form of two material zones A and B, wherein material zone A extends from the first end of the catalyst substrate at least over part of the length L and material zone B extends from the second end of the catalyst substrate at least over part of the length L, or wherein (ii) the catalyst substrate is formed by the SCR-catalytically active material A or B and a matrix component and the SCR-catalytically active material B or A extends at least over part of the length L of the catalyst substrate in the form of a material zone B or A. 1. A catalyst that comprises a catalyst substrate of length L and two SCR-catalytically active materials A and B that differ from each other ,wherein the SCR-catalytically active material A comprises a zeolite of the levyne structure type that contains ion-exchanged iron and/or copper, and the SCR-catalytically active material B comprises a zeolite of the chabazite structure type that contains ion-exchanged iron and/or copper, wherein(i) the SCR-catalytically active materials A and B are present in the form of two material zones A and B, wherein material zone A proceeding from the first end of the catalyst substrate extends at least over a part of the length L and material zone B proceeding from the second end of the catalyst substrate extends at least over part of the length L,or wherein(ii) the catalyst substrate is formed from the SCR-catalytically active material A and a matrix component, and the SCR-catalytically active material B extends in ...

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.

Acidic aromatization catalysts with improved activity and selectivity

Methods for producing supported catalysts containing a transition metal and a bound zeolite base are disclosed. These methods employ a step of impregnating the bound zeolite base with the transition metal, fluorine, and high loadings of chlorine. The resultant high chlorine content supported catalysts have improved catalyst activity in aromatization reactions.

POROUS MATERIAL, HONEYCOMB STRUCTURE, AND METHOD OF PRODUCING POROUS MATERIAL

A porous material includes aggregate particles, and a binding material that contains cordierite and zircon particles and binds the aggregate particles together in a state where pores are formed. 1. A porous material comprising:aggregate particles; anda binding material that contains cordierite and zircon particles and binds said aggregate particles together in a state where pores are formed.2. The porous material according to claim 1 , whereina ratio of a mass of said binding material to a total mass of said aggregate particles and said binding material is greater than or equal to 8 mass % and less than or equal to 40 mass %.3. The porous material according to claim 1 , whereina ratio of a mass of said zircon particles to a mass of said binding material is greater than or equal to 1 mass % and less than or equal to 50 mass %.4. The porous material according to claim 1 , whereina major axis of said zircon particles is greater than or equal to 2.0 μm.5. The porous material according to claim 1 , whereina porosity is higher than or equal to 50% and lower than or equal to 70%.6. The porous material according to claim 1 , whereina bending strength is greater than or equal to 7.5 MPa.7. The porous material according to claim 1 , whereina ratio of a mass of sodium to a mass of said porous material as a whole is less than 0.1 mass %.8. The porous material according to claim 1 , whereina representative value for an angle at which an edge of said binding material in a cross-section of said porous material rises with respect to a direction tangent to the edge at a position at which curvature is locally a maximum is greater than 0 degrees and less than or equal to 25 degrees.9. A honeycomb structure that is a tubular member made of the porous material according to and having an interior partitioned into a plurality of cells by partition walls.10. A method of producing a porous material claim 1 , comprising:a) obtaining a compact by molding a mixture of an aggregate raw material ...

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.

POROUS MATERIAL, HONEYCOMB STRUCTURE, AND METHOD OF PRODUCING POROUS MATERIAL

A porous material includes an aggregate in which oxide films are formed on surfaces of particle bodies, and a binding material that contains cordierite and binds the aggregate together in a state where pores are formed. The binding material or the oxide films contain a rare-earth component that excludes Ce. 1. A porous material comprising:an aggregate in which oxide films are formed on surfaces of particle bodies; anda binding material that contains cordierite and binds said aggregate together in a state where pores are formed,wherein said binding material or said oxide films contain a rare-earth component excluding Ce.2. The porous material according to claim 1 , whereina ratio of a mass of said rare-earth component in terms of an oxide is in a range of 0.1 to 15.0 mass % of said porous material as a whole.3. The porous material according to claim 1 , whereinsaid binding material contains said rare-earth component, andsaid rare-earth component includes at least one kind selected from the group consisting of Y, Yb, Er, and Ho.4. The porous material according to claim 1 , whereinsaid binding material contains said rare-earth component, and{'sub': 2', '2', '7, 'at least part of said rare-earth component exists as ASiO(A: Y, Yb, Er, or Ho).'}5. The porous material according to claim 1 , whereinsaid oxide films contain said rare-earth component, andsaid rare-earth component includes at least one kind selected from the group consisting of Dy, La, Nd, and Gd.6. The porous material according to claim 1 , wherein{'sub': 3', '4, 'said particle bodies are SiC particles or SiNparticles.'}7. The porous material according to claim 6 , whereinsaid oxide films contain cristobalite.8. The porous material according to claim 7 , whereina ratio of a mass of said cristobalite is in a range of 3.0 to 25.0 mass % of said porous material as a whole.9. The porous material according to claim 1 , whereinan alkali metal component is contained in said porous material, and a ratio of a mass of ...

SCR CATALYST

A copper-CHA zeolite catalyst for SCR of NOis disclosed. 1. A one-pot synthesis method for making a catalyst composition comprising a zeolite having a CHA framework , a molar silica-to-alumina ratio (SAR) of 45 to 85 , and an atomic copper-to-aluminium ratio of at least 1.25 , which method comprising forming a reaction mixture containing a source of silica , a source of alumina , a first CHA framework organic templating agent in the form of a copper metal-amine , a second distinct organic CHA templating agent , and seed crystals; heating the reaction mixture to facilitate crystallization and precipitation of the crystals of the catalyst composition; and collecting , washing and drying the crystals.2. The method of claim 1 , wherein the copper metal-amine is Cu-tetraethylenepentamine (Cu-TEPA) and the second distinct organic CHA templating agent is N claim 1 ,N claim 1 ,Ndimethylethylcyclohexylammonium (DMECHA).3. The method of claim 1 , wherein the reaction mixture is free from fluorine. This application is a continuation of U.S. parent application Ser. No. 14/559,099, filed Dec. 3, 2014, scheduled to issue on Dec. 24, 2019, and claims the priority benefit of U.S. Provisional Application No. 61/911,048, filed Dec. 3, 2013, both of which are incorporated herein by reference.The present invention relates to catalyst comprising a transition metal containing zeolite having a CHA framework.Zeolites are crystalline or quasi-crystalline aluminosilicates constructed of repeating SiOand AlOtetrahedral units. These units are linked together to form frameworks having regular intra-crystalline cavities and channels of molecular dimensions. Numerous types of synthetic zeolites have been synthesized and each has a unique framework based on the specific arrangement of its tetrahedral units. By convention, each framework type is assigned a unique three-letter code (e.g., “CHA”) by the International Zeolite Association (IZA).Synthetic CHA zeolites are produced using a structure ...

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 ...

Lta catalysts having extra-framework iron and/or manganese for treating exhaust gas

Provided are compositions, articles, systems and methods that comprise or use a catalyst composition comprising a zeolite having an LTA structure with iron, manganese or a combination thereof as an extra-framework metal. The zeolite can have a mole ratio of silica-to-alumina (SAR) of about 15 to about 70 and can contain about 0.5 to about 10 weight percent, based on the total weight of the zeolite, of extra-framework iron, manganese or a combination thereof.

Lean NOx Trap Diesel Oxidation Catalyst With Hydrocarbon Storage Function

The present invention is directed to a lean NOx trap diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the trapping and reduction of nitrogen oxides (NOx). Catalytic composites can comprise a catalytic material on a carrier, the catalytic material comprising a first NOx trap layer that comprises a NOx sorbent and one or more precious metal components located on the carrier and a second NOx trap layer containing hydrocarbon trapping functionality located over the first NOx trap layer that comprises a NOx sorbent, one or more precious metal components, and a zeolite, for example a beta zeolite, wherein the zeolite is substantially free of framework aluminum. Such zeolites are characterized by high crystallinity and/or by being substantially free of framework aluminum to minimize surface acidity. 1. A catalyst composite for abatement of exhaust gas emissions from an engine comprising: a catalytic material on a carrier , the catalytic material comprising a first NOx trap layer that comprises a first NOx sorbent and one or more precious metal components located on the carrier and a second NOx trap layer that comprises a second NOx sorbent , one or more precious metal components , and a zeolite , wherein the zeolite is substantially free of framework aluminum; wherein the catalytic material is effective to oxidize hydrocarbons and carbon monoxide and to trap and reduce NOx.2. The catalyst composite of claim 1 , wherein the zeolite comprises a beta zeolite.3. The catalyst composite of claim 1 , wherein the Si structure in a solid state Si NMR spectrum of the zeolite is essentially for tetrahedron Si(OSi)centers.4. The catalyst composite of claim 1 , wherein the zeolite comprises essentially no acid sites as measured by pyridine-adsorption diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy.5. The catalyst composite of claim 1 , wherein the Al structure in a ...

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 % ...

PALLADIUM/ZEOLITE-BASED PASSIVE NITROGEN OXIDE ADSORBER CATALYST FOR PURIFYING EXHAUST GAS

The invention relates to a catalyst which comprises a carrier substrate, palladium, and a zeolite, the largest channels of which are formed by 10 tetradrically coordinated atoms; to the use of said catalyst as a passive nitrogen oxide adsorber, an exhaust gas system which contains said catalyst and an SCR catalyst, and to a method for purifying the exhaust gas of motor vehicles using said exhaust gas system. 1. Catalyst comprising a carrier substrate of length L , palladium and a zeolite whose largest channels are formed by 10 tetrahedrally coordinated atoms.2. Catalyst according to claim 1 , characterized in that the zeolite is of structure type *MRE claim 1 , AEL claim 1 , AFO claim 1 , AHT claim 1 , BOF claim 1 , BOZ claim 1 , CGF claim 1 , CGS claim 1 , CSV claim 1 , DAC claim 1 , EUO claim 1 , FER claim 1 , HEU claim 1 , IFW claim 1 , IMF claim 1 , ITH claim 1 , ITR claim 1 , JRY claim 1 , JST claim 1 , LAU claim 1 , MEL claim 1 , MFS claim 1 , MTT claim 1 , MVY claim 1 , MWW claim 1 , NES claim 1 , OBW claim 1 , -PAR claim 1 , PCR claim 1 , PON claim 1 , PSI claim 1 , RRO claim 1 , SFF claim 1 , SFG claim 1 , STF claim 1 , STI claim 1 , STW claim 1 , -SVR claim 1 , SZR claim 1 , TER claim 1 , TON claim 1 , TUN claim 1 , UOS claim 1 , WEI or -WEN.3. Catalyst according to claim 1 , characterized in that the small-pore zeolite is of structure type MEL claim 1 , MTT claim 1 , MWW or SZR.4. Catalyst according to claim 1 , characterized in that the zeolite is of structure type MWW.5. Catalyst according to claim 1 , characterized in that the palladium is present in the zeolite structure as palladium cation.6. Catalyst according to claim 1 , characterized in that the palladium is present in amounts of 1.5 to 10% by weight claim 1 , based on the sum of the weights of zeolite and palladium and calculated as palladium metal.7. Catalyst according to claim 1 , characterized in that it comprises a zeolite of structure type MWW and palladium as the sole metal in an amount of ...

DEVICE FOR PURIFYING EXHAUST GAS

A device for purifying exhaust gas provided to purify exhaust gas in an engine, may include an exhaust line through which exhaust gas discharged from the engine passes, a NOx storage catalyst that is installed in the exhaust line to absorb a nitrogen oxide discharged from the exhaust gas, and detach an absorbed nitrogen oxide when a temperature of a catalyst is higher than a predetermined value, and a three way catalyst (TWC) arranged in rear of the NOx storage catalyst for reducing the nitrogen oxide detached from the NOx storage catalyst, wherein the NOx storage catalyst includes an LTA zeolite catalyst. 1. A device for purifying exhaust gas provided to purify exhaust gas in an engine , the device comprising:an exhaust line through which exhaust gas discharged from the engine passes;a nitrogen oxide (NOx) storage catalyst that is installed in the exhaust line to absorb a nitrogen oxide discharged from the exhaust gas, and detach an absorbed nitrogen oxide when a temperature of a catalyst is higher than a predetermined value; anda three way catalyst (TWC) arranged in rear of the NOx storage catalyst for reducing the nitrogen oxide detached from the NOx storage catalyst,wherein the NOx storage catalyst includesa Linde-Type A (LTA) zeolite catalyst.2. The device of claim 1 , further comprising:a controller that is configured to activate an absorption of the nitrogen oxide in the NOx storage catalyst by increasing a temperature of the exhaust gas in cold start, and control the exhaust gas in a rich condition when the temperature of the NOx storage catalyst is higher than the predetermined value.3. The device of claim 2 , wherein:the controller controls the exhaust gas in the rich condition by using a lambda signal of a lambda sensor when the temperature of the NOx storage catalyst is higher than the predetermined value.4. The device of claim 2 , wherein:the controller models the temperature of the exhaust gas according to a change of an engine driving variable, and ...

POROUS CERAMIC BODY TO REDUCE EMISSIONS

A porous ceramic honeycomb body including a substrate of intersecting porous walls forming axial channels extending from a first end face to a second end face. An active portion of the walls include a zeolite catalyst disposed inside pores thereof and/or is comprised of an extruded zeolite and a three way catalyst (TWC) is disposed on wall surfaces of at least a portion of the active portion. 1. A method of manufacturing a ceramic article , comprising:disposing zeolite catalyst inside pores in walls of a first portion of walls of a porous ceramic body; anddisposing three way catalyst (TWC) on wall surfaces of at least a portion of the first portion of the walls of the porous ceramic body.2. The method of claim 1 , wherein the TWC comprises at least one of hydrocarbon oxidation claim 1 , CO oxidation claim 1 , and NOx reduction catalysts.3. The method of claim 1 , wherein the walls of the porous ceramic body define axial channels extending from a first end face to a second end face of the porous ceramic body claim 1 , andthe first portion of the walls extends at least partially from the first end face to the second end face.4. The method of claim 1 , wherein the first portion of the walls is spaced apart from the first end face by a second portion of the walls.5. The method of claim 4 , wherein the second portion of the walls is substantially free of zeolite catalyst inside pores of the walls.6. The method of claim 4 , wherein the second portion of the walls has a lower density than the first portion of the walls.7. The method of claim 4 , wherein the first portion of the walls is spaced apart from the second end face by a third portion of the walls.8. The method of claim 7 , wherein the third portion of the walls is substantially free of zeolite catalyst inside pores of the walls.9. The method of claim 7 , wherein the second portion of the walls and the third portion of the walls are each substantially free of zeolite catalyst inside pores of the walls.10. A porous ...

ACTIVE SCR CATALYST

The invention relates to a catalyst comprising a small-pore zeolite that contains iron and copper and has a maximum ring size of eight tetrahedral atoms, characterized in that the channel width of the small-pore zeolite amounts to >3.8 Å (0.38 nm) in at least one dimension. 1. Catalyst comprising a small-pore zeolite that contains iron and copper and has a maximum ring size of eight tetrahedral atoms , wherein the channel width of the small-pore zeolite amounts to >0.38 nm (3.8 Å) in at least one dimension.2. Catalyst according to claim 1 , wherein the channel width of the small-pore zeolite is ≥0.47 nm (4.7 Å) in at least one dimension.3. Catalyst according to claim 1 , wherein the small-pore zeolite is of the structure type EAB claim 1 , ERI claim 1 , ESV claim 1 , JBW or LEV.4. Catalyst according to claim 1 , wherein the small-pore zeolite is of the structure type ERI or LEV.5. Catalyst according to claim 1 , wherein the small-pore zeolite has a SAR value of 1 to 50.6. Catalyst according to claim 1 , wherein the small-pore zeolite comprises copper in an amount of 0.2 to 3 wt. % claim 1 , calculated as Cu claim 1 , and iron in an amount of 0.2 to 3 wt. % claim 1 , calculated as Fe claim 1 , based in each case on the total weight of the exchanged small-pore zeolite.7. Catalyst according to claim 1 , wherein the small-pore zeolite comprises copper in an amount of 1.5 wt. % claim 1 , calculated as Cu claim 1 , and iron in an amount of 1.3 wt. % claim 1 , calculated as Fe claim 1 , and based in each case on the total weight of exchanged small-pore zeolite.8. Catalyst according to claim 1 , wherein the small-pore zeolite is of the structure type ERI and has an SAR value of 5 to 15.9. Catalyst according to claim 8 , wherein the molar ratio of Cu:Al is 0.03 to 0.10.10. Catalyst according to claim 8 , wherein the molar ratio of (Cu+Fe):Al is 0.12 to 0.2.11. Catalyst according to claim 1 , wherein the small-pore zeolite is of the structure type LEV and has a SAR value of ...

Scr catalyst and method of preparation thereof

NH 3 —SCR catalyst, containing iron promoted beta-zeolite, cerium oxide and titanium oxide and optionally further containing at least one of tungsten oxide, neodymium oxide, silicon oxide and diatomaceous earth, and method of preparation thereof.

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.

CATALYST FOR LEAN BURN

The present invention relates to catalysts for lean burn and provides a catalyst for lean burn that is capable of purifying NOsufficiently and that has a high ability to purify CO and HC over a wide temperature range from low to high temperatures. The present invention provides a catalyst for a lean-burn engine to purify exhaust gas, the catalyst including: an integrally structured support; and a catalyst layer containing a precious metal element, provided on the integrally structured support and having at least two layers that include an upper layer and a lower layer; wherein the upper layer of the catalyst layer contains at least a proton-substituted β-type zeolite and a ceria-based oxide supporting rhodium, and the lower layer of the catalyst layer contains at least a NOstorage component and platinum supported on an inorganic oxide. 1: A catalyst , suitable for purifying an exhaust gas from a lean-burn engine , and comprising:an integrally structured support; and a catalyst layer comprising a precious metal element, provided on the integrally structured support and having at least two layers, the at least two layers comprising an upper layer and a lower layer; whereinthe upper layer comprises a proton-substituted β-type zeolite and a ceria-based oxide supporting rhodium,{'sub': 'x', 'the lower layer comprises a NOstorage component and platinum supported on an inorganic oxide, and'}a total content of ceria-based oxides in the catalyst layer is 70 g/L or more per unit volume of the integrally structured support.2: The catalyst of claim 1 , wherein the NOstorage component comprises BaO and CeO.3. (canceled)4: The catalyst of claim 1 , wherein a content of the proton-substituted β-type zeolite is 10 g/L or more per unit volume of the integrally structured support.5: The catalyst of claim 1 , wherein the inorganic oxide of the lower layer comprises alumina.6: The catalyst of claim 5 , wherein the lower layer comprises platinum and palladium.7: The catalyst of claim 1 ...

Acidic Aromatization Catalyst with Improved Activity and Stability

Methods for producing supported catalysts containing a transition metal and a bound zeolite base are disclosed. These methods employ a step of impregnating the bound zeolite base with the transition metal, fluorine, and high loadings of chlorine. The resultant high chlorine content supported catalysts have improved catalyst activity in aromatization reactions. 116-. (canceled)17. A method of producing a supported catalyst , the method comprising:(a) impregnating a bound zeolite base with a transition metal precursor, a chlorine precursor, and a fluorine precursor to form an impregnated zeolite base; and(b) drying and then calcining the impregnated zeolite base to produce the supported catalyst; wherein the supported catalyst comprises, based on the total weight of the supported catalyst:from about 0.3 wt. % to about 3 wt. % of a transition metal;from about 1.8 wt. % to about 4 wt. % of chlorine; andfrom about 0.4 wt. % to about 1.5 wt. % of fluorine; andwherein the supported catalyst is characterized by a peak reduction temperature on a Temperature Programmed Reduction curve in a range from about 580° F. to about 800° F.18. The method of claim 17 , wherein impregnating the bound zeolite base with the transition metal precursor claim 17 , the chlorine precursor claim 17 , and the fluorine precursor comprises mixing the bound zeolite base with an aqueous solution comprising the transition metal precursor claim 17 , the chlorine precursor claim 17 , and the fluorine precursor.19. The method of claim 17 , wherein the method further comprises a reducing step after the drying and calcining of the impregnated zeolite base claim 17 , the reducing step comprising contacting the supported catalyst with a reducing gas stream to produce an activated catalyst.20. The method of claim 19 , wherein the activated catalyst comprises from about 0.2 wt. % to about 1.3 wt. % of chlorine claim 19 , based on the total weight of the activated catalyst.21. An activated aromatization ...

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 , ...

LOW PHOSPHORUS CHABAZITES

A catalyst washcoat is provided having a molecular sieve with a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiOand AlOin a mole ratio of about 5 to about 40. The washcoat includes one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article. 1. A method for reducing NOx in an exhaust gas comprising contacting the gas with a catalyst for a time and temperature sufficient to reduce the level of NOx compounds in the gas , wherein the catalyst is a catalyst comprising a composition comprising a molecular sieve material having a CHA framework , wherein the framework consists of periodic building units having 36 interlinked T-atoms selected from the group consisting of aluminum , silicon , and phosphorous , and wherein said molecular sieve material has a mean phosphorous concentration of about 0.5 to about 1.5 atoms per periodic building unit.2. The method of claim 1 , wherein said mean phosphorus concentration is about 1.0 to about 1.5 atoms per periodic building unit.3. The method of claim 1 , wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10.4. The method of claim 1 , wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10 and an Al:P ratio of greater than about 1.5. The method of claim 1 , wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10 and an Al:P ratio of greater than about 10.6. The method of claim 1 , wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10 and an Al:P ratio of greater than about 100.7. The method of claim 1 , wherein said phosphorus is connected to at least a portion of said aluminum via oxygen bridges.8. The method of claim 1 , wherein said molecular sieve material further comprises a non-aluminum base metal.9. The method of claim 8 , wherein said non-aluminum base metal is ion-exchanged.10. The method of claim 9 , ...

SCR CATALYST FOR THE TREATMENT OF AN EXHAUST GAS OF A DIESEL ENGINE

An SCR catalyst for treating diesel exhaust gas has: a flow-through substrate with an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end and a plurality of passages defined by internal walls of the flow through substrate extending therethrough; a first coating disposed on the internal wall surface of the substrate, the surface defining the interface between the internal walls and passages, the first coating extending over 40 to 100% of the substrate axial length, the first coating having an 8-membered ring pore zeolitic material with copper and/or iron; a second coating extending over 20 to 100% of the substrate axial length, the second coating having a first oxidic material with titania, wherein at least 75 wt. % of the second coating is titania, calculated as TiO, and 0 to 0.01 wt. % of the second coating is vanadium oxides, calculated as VO. 1. A selective catalytic reduction catalyst suitable for treating an exhaust gas of a diesel engine , the catalyst comprising:a flow through substrate comprising an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end and a plurality of passages defined by internal walls of the flow through substrate extending therethrough;(ii) a first coating disposed on a surface of the internal walls of the substrate, the surface defining an interface between the internal walls and the passages, the first coating extending over 40 to 100% of the substrate axial length, and comprising an 8-membered ring pore zeolitic material comprising copper and/or iron;{'sub': 2', '2', '5, '(iii) a second coating extending over 20 to 100% of the substrate axial length, the second coating comprising a first oxidic material comprising titania, the second coating comprising at least 75 wt. % titania, calculated as TiO, and from 0 to 0.01 wt. % vanadium oxide(s), calculated as VO.'}2. The catalyst of claim 1 , wherein the first coating extends over 75 to 100% of the ...

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.

Manganese-Containing Diesel Oxidation Catalyst

An oxidation catalyst composite, methods, and systems for the treatment of exhaust gas emissions from a diesel engine are described. More particularly, an oxidation catalyst composite including a first washcoat layer comprising a Pt component and a Pd component, and a second washcoat layer including a refractory metal oxide support containing manganese, a zeolite, and a platinum component is described.

NOx ADSORBER CATALYST

A lean NO x trap catalyst and its use in an emission treatment system for internal combustion engines is disclosed. The lean NO x trap catalyst comprises a first layer and a second layer.

Exhaust system for a lean-burn internal combustion engine including scr catalyst

An exhaust system 20 for an internal combustion engine comprises a) a first catalysed substrate monolith 12 comprising a first washcoat coating disposed in a first washcoat zone 16 of the substrate monolith and a second washcoat coating disposed in a second washcoat zone 18 of the substrate monolith, wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material, wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures, wherein the second washcoat coating comprises at least one material supporting copper for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat; and b) a second catalysed substrate monolith 14 comprising a catalyst for selectively catalysing the reduction of oxides of nitrogen to dinitrogen with a nitrogenous reductant disposed downstream from the first catalysed substrate monolith.

CATALYSED SUBSTRATE MONOLITH

A catalysed substrate monolith for use in treating exhaust gas emitted from a lean-burn internal combustion engine, which catalysed substrate monolith comprising a first washcoat coating and a second washcoat coating wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material for the at least one PGM, wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures, wherein the second washcoat coating comprises at least one metal oxide for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat coating. 120.-. (canceled)21. A substrate monolith comprising:a first washcoat comprising a catalyst material disposed on a first support material, wherein the catalyst material comprises at least one platinum group metal; anda second washcoat comprising a metal that is either Pd or a mixture or alloy comprising Au and Pd, wherein the metal supported on a second support material comprising zirconia;wherein the second washcoat is adjacent to the first washcoat and arranged to contact the exhaust gas after the exhaust gas has contacted the catalytic material.22. The substrate monolith of claim 21 , wherein the catalyst material of the first washcoat comprises platinum (Pt).23. The substrate monolith of claim 21 , wherein the catalyst material of the first washcoat comprises both platinum (Pt) claim 21 , and palladium (Pd).24. The substrate monolith of claim 23 , wherein the Pt and Pd are present in a ratio by mass of Pt to Pd in a range of from 1:1 to 5:1.25. The substrate monolith of claim 21 , wherein the catalyst material is present in the first washcoat in a range of from 1 g ftto 500 g ft.26. The substrate monolith of claim 21 , wherein the second support material is ...

Catalyst Compositions Comprising Small Size Molecular Sieves Crystals Deposited on a Porous Material

Catalyst compositions comprising an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve, characterized in that the crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm, and in that the catalyst composition presents a concentration of acid sites ranges from 50 to 1200 μmol/g measured by TPD NH3 adsorption; and the XRD pattern of said catalyst composition is the same as the X ray diffraction pattern of said inorganic porous material. 115-. (canceled)17. The process according to claim 16 , further characterized in that the steps e) to g) are repeated at least two times prior to performing step h).18. The process according to claim 17 , wherein the maturation of the solution is conducted for at least 30 min and at most 100 h each time.19. The process according to claim 18 , wherein the steps e) to g) are performed once and maturation of the solution is conducted for at most 50 h.20. The process according to claim 16 , further comprising claim 16 , after step h) claim 16 , performing one or more of the following steps:introducing phosphorous by impregnation of the catalyst composition by a solution containing phosphorous, said step being optionally followed by further steps of calcinations and/or steaming;adding at least one metal selected from the group consisting of: B, Cr, Co, Ga, Fe, Li, Mg, Ca, Mn, La, Ti, Mo, W, Ni, Ag, Sn or Zn, Pt, Pd, Ru, Re, Os, Au, and combinations thereof, by impregnation of the catalyst composition by a solution containing the at least one metal;adding at least one binder selected from the group consisting of: silica, silica alumina, metal silicates, metal oxides and/or metals, amorphous alumophophate or silica alumophosphates, gels including mixtures of silica and metal oxides, and combinations thereof, by spray drying or extrusion;shaping of the catalyst composition by extrusion.21. A process comprising using a catalyst ...

SELECTIVE CATALYTIC REDUCTION ARTICLES AND SYSTEMS

Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low NO formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings disposed thereon, for example, a zoned coating comprising an upstream zone comprising a coating layer comprising a steam-activated iron-containing molecular sieve and a downstream zone comprising a coating layer comprising a high copper-containing molecular sieve. 1. A method for activating an iron-containing molecular sieve powder , the method comprising:adding iron into a molecular sieve to form an iron-containing molecular sieve; andcarrying out steam-calcination of the iron-containing molecular sieve powder at a temperature of about 650° C. to about 750° C. for a period of about 20 minutes to about 2 hours in the presence of water vapor.2. The method of claim 1 , wherein adding the iron into the molecular sieve comprises a process selected from the group consisting of ion-exchange claim 1 , impregnation of an iron salt claim 1 , and mixing a molecular sieve with iron oxide.3. A method of preparing a catalytic article claim 1 , the method comprising applying to a substrate a catalytic coating comprising a steam-activated iron-containing molecular sieve powder prepared according to .4. The method of claim 3 , wherein the coated substrate is adapted to achieve greater than 90% NOx conversion at 250° C. under fast SCR conditions without further steam-treatment.5. A selective catalytic reduction article comprising a substrate having a front upstream end and a rear downstream end defining an axial length and having a catalytic coating thereon claim 3 , where the catalytic coating comprises:a first coating layer comprising a steam-activated iron-containing molecular sieve; anda second coating layer comprising a copper-containing molecular sieve.6. The selective catalytic ...

SELECTIVE CATALYTIC REDUCTION ARTICLES AND SYSTEMS

Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low NO formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings containing copper-containing molecular sieves disposed thereon, where for example a concentration of catalytic copper in an upstream zone is lower than the concentration of catalytic copper in a downstream zone. 1. A selective catalytic reduction article comprising a substrate having a front upstream end and a rear downstream end defining an axial length of the substrate and having a catalytic coating thereon , wherein the catalytic coating comprises:a first coating layer comprising a first copper-containing molecular sieve; anda second, different coating layer comprising a second copper-containing molecular sieve.2. The selective catalytic reduction article of claim 1 , wherein the catalytic coating is zoned and comprises:a first zone proximate to the front upstream end of the substrate, the first zone including the first coating layer comprising the first copper-containing molecular sieve; anda second zone proximate to the rear downstream end of the substrate, the second zone including the second coating layer comprising the second, different copper-containing molecular sieve.3. The selective catalytic reduction article of claim 2 , wherein the first copper-containing molecular sieve in the first zone has a copper concentration that is less than or equal a copper concentration of the second claim 2 , different copper-containing molecular sieve in the second zone.4. The selective catalytic reduction article of claim 1 , wherein the substrate is a porous wall-flow filter or a flow-through monolith.5. The selective catalytic reduction article of claim 1 , wherein the first copper-containing molecular sieve comprises copper oxide in an amount of about 0.1 to about 4 wt % claim ...

CATALYST COMPRISING A MIXTURE OF AN AFX-STRUCTURE ZEOLITE AND A BEA-STRUCTURE ZEOLITE AND AT LEAST ONE TRANSITION METAL FOR SELECTIVE REDUCTION OF NOX

The invention relates to a catalyst comprising a mixture of AFX-structure and BEA-structure zeolites and at least one additional transition metal, to the process for preparing same and to the use thereof for the selective catalytic reduction of NOx in the presence of a reducing agent such as NHor H. 1. A process for preparing a catalyst comprising a mixture of AFX-structure and BEA-structure zeolites , and at least one transition metal , comprising at least the following steps:{'sub': 2', '2', '3', '2', '2', '3', 'ze', '2', '2', '3', '2', '2', '3', '2', '2', '3', 'ze, 'i) mixing, in aqueous medium, of an FAU zeolite having an SiO/AlOmolar ratio of between 30 and 100 with at least one FAU-structure zeolite having an SiO/AlOmolar ratio of between 2 and 30 (upper limit excluded), and wherein the mathematical parameter, P, corresponding to the mass percentage of the FAU zeolite with an SiO/AlOmolar ratio of between 30 and 100, in its anhydrous form (expressed in %) in the mixture of FAU zeolites, multiplied by the SiO/AlOmolar ratio of the same FAU zeolite with an SiO/AlOmolar ratio of between 30 and 100, is such that: 3250 Подробнее

Honeycomb monolith structure loaded with nanozeolites for enhanced propylene selectivity in methanol conversion

A catalyst system and a process for methanol to light olefin conversion with enhanced selectivity towards propylene. The catalyst system comprises a honeycomb monolith catalyst support coated with aluminosilicate nanozeolite catalysts on the edges and inside the channels of the support structure. The aluminosilicate nanozeolite catalysts have not been pre-modified with a promoter metal. The catalyst system gives higher hydrothermal stability to the catalyst compared to randomly packed pellet catalysts and allows methanol to be converted to predominantly propylene at a low temperature, with decreased selectivity towards C 2 , higher olefins and paraffinic hydrocarbons.

Catalyst for treating exhaust gas

Provided is a catalyst composition having an aluminosilicate molecular sieve having an AEI structure and a mole ratio of silica-to-alumina of about 20 to about 30 loaded with about 1 to about 5 weight percent of a promoter metal, based on the total weight of the molecular sieve material. Also provided are method, articles, and systems utilizing the catalyst composition.

Catalyst Compositions, Articles, Methods And Systems

Described are catalyst compositions, catalytic articles, exhaust gas treatment systems and methods that utilize the catalytic articles. The catalyst composition comprises a washcoat including a zeolite, refractory metal oxide support particles, and a platinum group metal supported on the refractory metal oxide support particles. Greater than 90% of the refractory metal oxide particles supporting PGM have a particle size greater than 1 μm and a d 50 less than 40 microns.

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.

Selective Catalytic Reduction Catalyst System

Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition having a faster DeNOx response time when exposed to ammonia than the second catalyst composition and the second SCR catalyst composition has a higher steady state DeNOx performance than the first catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

MULTILAYER COATED PARTICLE FILTER

A porous ceramic substrate for use as a particle filter, with a porosity of at least 50%, which includes a non-uniform coating layer of an oxide component in contact with a surface of the ceramic substrate, which oxide component is distributed on the surface and in dead-end pores of the ceramic substrate and creates the non-uniform coating layer on the substrate support, wherein the coating layer has a substantially smooth surface. Such substrate is typically a particle filter or part of a particle filter, e.g. a DPF. 133-. (canceled)34. A porous ceramic substrate comprising:a porous substrate support with a porosity of at least 50% v/v, wherein the porosity is measured by mercury intrusion porosimetry according to DIN 66133, which support further comprises a) a first non-uniform coating layer of an oxide component in contact with a surface of the substrate support, wherein the oxide component is selected from alumina, titania, silica, ceria, zirconia, niobium oxide, praseodymium oxide or mixtures thereof, which oxide component is distributed on the surface of the substrate support and in dead-end pores of the substrate support and creates the non-uniform coating layer on the substrate support, wherein the first coating layer has a smooth surface and b) a second coating layer of a SCR catalytic active material in direct contact with the smooth surface of the first coating layer.35. The porous ceramic substrate of claim 34 , wherein the oxide component includes nano particles having a mean diameter in the range from 1 nm to 900 nm.36. The porous ceramic substrate of claim 34 , wherein the oxide component is present in the amount per volume of 20-100 grams of oxide component/liter of substrate.37. The porous ceramic substrate of claim 34 , wherein the oxide component is distributed on at least 80% of the whole surface of the substrate support and in dead-end pores of the substrate support.38. The porous ceramic substrate of claim 37 , wherein the oxide component is ...

SCR-CATALYZED SOOT FILTER WITH INTEGRATED LEAN NOx TRAP CATALYST FOR USE IN PASSIVE SELECTIVE CATALYTIC REDUCTION

Disclosed herein is a catalyzed soot filter (CSF) containing a porous wall flow substrate, a lean NOx trap (LNT) catalyst, and a catalyst for selective catalytic reduction (SCR). Also disclosed is a method of preparing the catalyzed soot filter, an emissions treatment system containing the catalyzed soot filter, and processes for treating exhaust gas emissions employing the catalyzed soot filter. 1: A catalyzed soot filter (CSF) , comprising:a porous wall flow substrate;a lean NOx trap (LNT) catalyst; anda catalyst for selective catalytic reduction (SCR),wherein:the porous wall flow substrate comprises an inlet end, an outlet end, a substrate axial length extending between the inlet end and the outlet end, and a plurality of channels defined by internal walls of the porous wall flow substrate;the plurality of channels comprise inlet channels having an open inlet end and a closed outlet end, and outlet channels having a closed inlet end and an open outlet end;the LNT catalyst is provided on a portion of the surface of the inlet channel walls and on at least a portion of the surface of pores within the channel walls underneath the surface of the channel walls coated with the LNT catalyst;the portion of the inlet channel walls coated with the LNT catalyst extends from the inlet end to x % of the substrate axial length with: 0 Подробнее

ZEOLITIC CATALYTIC CONVERSION OF ALCOHOLS TO HYDROCARBONS

A method for converting an alcohol to a hydrocarbon, the method comprising contacting said alcohol with a metal-loaded zeolite catalyst at a temperature of at least 100° C. and up to 550° C., wherein said alcohol can be produced by a fermentation process, said metal is a positively-charged metal ion, and said metal-loaded zeolite catalyst is catalytically active for converting said alcohol to said hydrocarbon. 1. A method for converting ethanol to an aromatic hydrocarbon , the method comprising contacting said ethanol with a metal-loaded zeolite catalyst at a temperature of at least 300° C. and up to 550° C. , said metal is a positively-charged metal ion , and said metal-loaded zeolite catalyst is catalytically active for converting said ethanol to said hydrocarbon.2. (canceled)3. The method of claim 1 , wherein said ethanol is a component of an aqueous solution.4. The method of claim 1 , wherein said ethanol is a component of an aqueous solution in a concentration of no more than about 20%.5. The method of claim 4 , wherein said concentration is no more than about 10%.6. The method of claim 1 , wherein said ethanol is produced by a fermentation process.7. The method of claim 6 , wherein said ethanol is a component of a fermentation stream when contacted with said metal-loaded zeolite catalyst.8. (canceled)9. The method of claim 1 , wherein said temperature is at least 350° C. and up to 550° C.10. The method of claim 1 , wherein said temperature is at least 400° C. and up to 550° C.11. (canceled)12. The method of claim 1 , wherein said metal is selected from alkali metal claim 1 , alkaline earth metal claim 1 , copper claim 1 , iron claim 1 , vanadium claim 1 , zinc claim 1 , titanium claim 1 , cadmium claim 1 , gallium claim 1 , indium claim 1 , and combinations thereof.13. The method of claim 1 , wherein said metal is gallium or indium.14. The method of claim 1 , wherein said zeolite comprises a pentasil zeolite.15. The method of claim 14 , wherein said pentasil ...

Production of zeolite-based composite materials with hierarchichal porosity

A method is provided for generating a composite material with a support structure and a coating on the surface of the support structure, the coating comprising, as active component, crystals of a zeolite material or of a zeolite-like material, with intercrystalline mesopores and/or macropores being formed in the coating, characterized in that the method comprises the following steps: a) providing a suspension which comprises nanoscale starting crystals of a zeolite material or of a zeolite-like material, and also precursor compounds of the zeolite material or zeolite-like material, b) applying the suspension provided in step a) to the surface of the support structure, c) compacting the suspension applied in step b) by at least partially removing the solvent that forms the liquid phase of the suspension, to yield a coating which comprises the starting crystals and the precursor compounds, d) keeping the coating obtained in step c) on the surface of the support structure in a vapor-containing atmosphere at an elevated temperature, so that the precursor compounds present are converted into a zeolite material or a zeolite-like material and, together with the starting crystals, form the coating which comprises crystals of a zeolite material or of a zeolite-like material.

OXIDATION CATALYST COMPRISING SULFUR COMPOUND

A diesel oxidation catalyst article is provided, which includes a substrate carrier having a plurality of channels adapted for gas flow and a catalyst composition positioned to contact an exhaust gas passing through each channel. The catalyst composition includes a platinum (Pt) component and a sulfur (S)-containing component impregnated onto a refractory metal oxide support and is effective to abate hydrocarbon and carbon monoxide, as well as oxidize NO to NOin the exhaust gas. Methods of making and using the catalyst article are also provided, as well as emission treatment systems comprising the catalyst article. 1. A catalyst article for abatement of exhaust gas emissions from an engine comprising:a substrate carrier having a plurality of channels adapted for gas flow and a catalyst composition positioned to contact an exhaust gas passing through each channel,wherein the catalyst composition comprises a platinum (Pt) component and a sulfur (S)-containing component impregnated onto a refractory metal oxide support; and{'sub': '2', 'wherein the catalyst composition is effective to abate hydrocarbon and carbon monoxide, and to oxidize NO to NOin the exhaust gas.'}2. The catalyst article of claim 1 , wherein the Pt component and the sulfur-containing component are present in a Pt:S molar ratio in a range of about 1:1 to about 1:5 claim 1 , and wherein the sulfur-containing component is calculated as sulfur dioxide (SO).3. The catalyst article of claim 1 , wherein the catalyst composition is substantially free of palladium.4. The catalyst article of claim 1 , wherein the catalyst composition further comprises a zeolite.5. The catalyst article of claim 1 , wherein the sulfur-containing component claim 1 , measured as sulfur dioxide (SO) claim 1 , is present in an amount in the range of about 2 g/ftto about 250 g/ftand the Pt component is present in an amount in the range of about 10 g/ftto about 200 g/ft.6. The catalyst article of claim 1 , wherein the sulfur- ...

Chabazite zeolite catalysts having low silica to alumina ratios

Disclosed are zeolite catalysts having the CHA crystal structure with a low silica to alumina ratio, as well as articles and systems incorporating the catalysts and methods for their preparation and use. The catalysts can be used to reduce NOx from exhaust gas streams, particularly those emanating from gasoline or diesel engines.

COATED SUBSTRATES FOR USE IN CATALYSIS AND CATALYTIC CONVERTERS AND METHODS OF COATING SUBSTRATES WITH WASHCOAT COMPOSITIONS

Disclosed are, inter alia, methods of forming coated substrates for use in catalytic converters, as well as washcoat compositions and methods suitable for using in preparation of the coated substrates, and the coated substrates formed thereby. The catalytic material is prepared by a plasma-based method, yielding catalytic material with a lower tendency to migrate on support at high temperatures, and thus less prone to catalyst aging after prolonged use. Also disclosed are catalytic converters using the coated substrates, which have favorable properties as compared to catalytic converters using catalysts deposited on substrates using solution chemistry. Also disclosed are exhaust treatment systems, and vehicles, such as diesel vehicles, particularly light-duty diesel vehicles, using catalytic converters and exhaust treatment systems using the coated substrates. 1. A coated substrate comprising:a substrate;a washcoat layer comprising zeolite particles; anda washcoat layer comprising catalytically active particles;wherein the catalytically active particles comprise plasma synthesized composite nano-particles bonded to micron-sized carrier particles, and the composite nano-particles comprise a support nano-particle and a catalytic nano-particle, the catalytic nano-particle comprising at least one platinum group metal.2. The coated substrate of claim 1 , wherein the washcoat layer comprising zeolite particles is formed on top of the washcoat layer comprising catalytically active particles.3. The coated substrate of claim 1 , wherein the washcoat layer comprising catalytically active particles is formed on top of the washcoat layer comprising zeolite particles.4. (canceled)5. The coated substrate of claim 1 , wherein the catalytic nano-particles comprise platinum and palladium.6. The coated substrate of claim 5 , wherein the catalytic nano-particles comprise platinum and palladium in a weight ratio of 2:1 platinum:palladium.7. The coated substrate of claim 1 , wherein the ...

Pgm catalyst for treating exhaust gas

Provided are catalysts comprising a small pore molecular sieve embedded with PGM and methods for treating lean burn exhaust gas using the same.

ARTIFICIAL ZEOLITES

Zeolites are industrially important materials possessing high Bronsted acidity and shape-selectivity. However, their inherently small pores restrict application for catalytic conversion of bulky molecules. A method of synthesis of ‘artificial’ zeolites. The artificial zeolites have well-tailored Bronsted and Lewis acid sites prepared on mesostructured silica to circumvent this limitation. This novel approach utilizes atomic layer deposition to tailor both porosity and acid speciation, providing exquisite control over catalytic behavior and enabling systematic studies. 1. A method of increasing Bronsted acidity comprising:forming amorphous silica-alumina on a substrate;depositing a material having a silicon-oxygen species by atomic layer deposition; andforming a plurality of silanol functional groups on the amorphous silica-alumina substrate.2. The method of claim 1 , wherein for a portion of the plurality of silanol functional groups claim 1 , further comprising forming a bridge with an adjacent aluminum atom;3. The method of claim 2 , wherein the portion of the plurality of silanol functional groups bridged with an adjacent aluminum atom for a Bronsted acid site.4. The method of claim 1 , wherein the deposited material is silica.5. The method of claim 1 , wherein forming the amorphous silica-alumina comprises depositing an aluminum containing material by ALD.6. The method of claim 4 , wherein the deposition of the aluminum containing material compress a single exposure to trimethyl Aluminum (TMA).7. The method of claim 5 , wherein the deposition of aluminum further comprises a water exposure following the single TMA exposure claim 5 , followed by a purge and then a TMSiOH exposure.8. The method of claim 6 , wherein the deposition of the silicon-oxygen material comprises at least one TMSiOH ALD cycle.9. The method of claim 7 , wherein the deposition of the silicon-oxygen material comprises between 3 and 30 TMSiOH ALD cycles.10. The method of claim 1 , wherein a ...

Oxidation Catalyst for Treating the Exhaust Gas of a Compression Ignition Engine

An exhaust system for a compression ignition engine comprising an oxidation catalyst for treating carbon monoxide (CO) and hydrocarbons (HCs) in exhaust gas from the compression ignition engine, wherein the oxidation catalyst comprises: a platinum group metal (PGM) component selected from the group consisting of a platinum (Pt) component, a palladium (Pd) component and a combination thereof; an alkaline earth metal component; a support material comprising a modified alumina incorporating a heteroatom component; and a substrate, wherein the platinum group metal (PGM) component, the alkaline earth metal component and the support material are disposed on the substrate.

Oxidation Catalyst for a Compression Ignition Engine

An oxidation catalyst for treating an exhaust gas from a compression ignition engine, which oxidation catalyst comprises: a substrate; a first washcoat region comprising palladium (Pd) and a first support material comprising cerium oxide; and a second washcoat region comprising platinum (Pt) and a second support material.

DIESEL OXIDATION CATALYST

An oxidation catalyst composite, methods, and systems for the treatment of exhaust gas emissions from a diesel engine are described. More particularly, described is an oxidation catalyst composite including a first oxidation material comprising a first refractory metal oxide support, a rare earth oxide, and palladium (Pd); a second oxidation material comprising a second refractory metal oxide, and platinum (Pt) and palladium (Pd); and a protective overlayer comprising a third refractory metal oxide, platinum (Pt) and, optionally, palladium (Pd), and a molecular sieve promoted with a metal selected from one or more of Cu, Fe, Co, Ni, Mn, V, and, Ag. The oxidation catalyst composite is sulfur tolerant. 1. An oxidation catalyst composite for abatement of exhaust gas emissions from a lean burn engine , the catalyst composite comprising: a first oxidation material including a first refractory metal oxide support, a rare earth oxide component, and palladium (Pd), the first oxidation material being substantially free of platinum;', 'a second oxidation material including a second refractory metal oxide support, and platinum (Pt) and palladium (Pd) in a platinum to palladium ratio of 10:1 to 1:10, the second oxidation material being substantially free of rare earth oxide; and', 'a protective overlayer including a third refractory metal oxide, platinum (Pt) and, optionally, palladium (Pd), and a molecular sieve promoted with a metal selected from one or more of Cu, Fe, Co, Ni, Mn, V, and Ag, the protective overlayer being substantially free of a rare earth oxide., 'a carrier substrate having a length, an inlet end and an outlet end, an oxidation catalyst material on the carrier, the oxidation catalyst material comprising2. The oxidation catalyst composite of claim 1 , wherein the first oxidation material is in an underlayer on the carrier substrate claim 1 , the second oxidation material is in a middle layer on the under layer claim 1 , and the protective overlayer is in an ...

CATALYST SYSTEM FOR REDUCING NITROGEN OXIDES

The invention relates to a catalyst system for reducing nitrogen oxides, which comprises a nitrogen oxide storage catalyst and an SCR catalyst, wherein the nitrogen oxide storage catalyst consists of at least two catalytically active washcoat layers on a supporting body, wherein a lower washcoat layer A contains cerium oxide, an alkaline earth compound and/or alkali compound, as well as platinum and palladium, and an upper washcoat layer B, which is arranged over the washcoat layer A, contains cerium oxide, platinum and palladium, and no alkali compound and no alkaline earth compound. The invention also relates to a method for converting NOx in exhaust gases of motor vehicles that are operated by means of engines that are operated in a lean manner. 2. Catalyst system according to claim 1 , characterized in that the washcoat layer B contains cerium oxide in a quantity of 46 to 180 kg/m(from 46 to 180 g/L).3. Catalyst system according to claim 1 , characterized in that the washcoat layer A contains cerium oxide in a quantity of 14 to 95 kg/m(from 14 to 95 g/L).4. Catalyst according to claim 1 , characterized in that the total washcoat loading of the supporting body is 300 to 600 kg/m(300 to 600 g/L) claim 1 , in relation to the volume of the supporting body.5. Catalyst system according to claim 4 , characterized in that the loading with washcoat layer A amounts to 150 to 500 kg/m(150 to 500 g/L) claim 4 , and the loading with washcoat layer B amounts to 50 to 300 kg/m(50 to 300 g/L) claim 4 , in relation to the volume of the supporting body in each case.6. Catalyst system according to claim 4 , characterized in that the loading with washcoat layer A amounts to 250 to 300 kg/m(250 to 300 g/L) claim 4 , and claim 4 , with washcoat layer B claim 4 , amounts to 100 to 200 kg/m(100 to 200 g/L) claim 4 , in relation to the volume of the supporting body in each case.7. Catalyst system according to claim 1 , characterized in that the ratio of platinum to palladium in the ...

Oxidation Catalyst for a Compression Ignition Engine

An oxidation catalyst for treating an exhaust gas from a compression ignition engine, which oxidation catalyst comprises: a substrate; a first washcoat region comprising palladium (Pd) and a first support material comprising cerium oxide; and a second washcoat region comprising platinum (Pt) and a second support material. 1. An oxidation catalyst for treating an exhaust gas from a compression ignition engine , which oxidation catalyst comprises:a flow-through substrate monolith having an inlet end and an outlet end;a first washcoat region comprising palladium (Pd) and a first support material comprising cerium oxide; anda second washcoat region comprising platinum (Pt) and a second support material,wherein the second washcoat region is arranged to contact inlet exhaust gas before the first washcoat region.2. The oxidation catalyst according to claim 1 , wherein the second washcoat region further comprises palladium (Pd).3. The oxidation catalyst according to claim 2 , wherein the mass of platinum (Pt) is greater than the mass of palladium (Pd) in the second washcoat region.4. The oxidation catalyst of claim 1 , wherein the second support material comprises a refractory metal oxide.5. The oxidation catalyst according to claim 4 , wherein the refractory metal oxide is selected from the group consisting of alumina claim 4 , silica claim 4 , titania claim 4 , zirconia claim 4 , ceria and mixed or composite oxides of two or more thereof.6. The oxidation catalyst according to claim 5 , wherein the refractory metal oxide is alumina.7. The oxidation catalyst of claim 1 , wherein the first washcoat region comprises an amount of palladium (Pd) of less than 2% by weight claim 1 , preferably 0.25 to 1.9% by weight.8. The oxidation catalyst of claim 1 , wherein the first washcoat region is a first washcoat zone and the second washcoat region is a second washcoat zone claim 1 , and wherein the second washcoat zone is disposed or supported on the substrate downstream of the first ...

Low temperature catalyst/hydrocarbon trap

A low-temperature catalyst is provided for reducing cold-start hydrocarbon emissions. The catalyst comprises a platinum group metal impregnated onto an oxygen storage material. The catalyst may be used alone or may be included in a hydrocarbon trap containing a hydrocarbon adsorption material therein. The catalyst/hydrocarbon trap is positioned in the exhaust system of a vehicle downstream from a close-coupled catalyst such that the exhaust temperature at the catalyst location does not exceed 850° C. during normal vehicle operation and when combined with a hydrocarbon adsorption material in a trap, the exhaust temperature does not exceed 700° C.

CATALYST FOR PURIFYING THE EXHAUST GASES OF DIESEL ENGINES

The present invention relates to a catalyst that comprises a carrier body with a length L, which extends between a first end face ‘a’ and a second end face ‘b’, and differently composed. catalytically-active material zones A, B, and C arranged on the carrier body, wherein 1. Catalyst that comprises a carrier body with a length L , which extends between a first end face ‘a’ and a second end face ‘b’ , and differently composed , catalytically-active material zones A , B , and C arranged on the carrier body , wherein{'b': 2', '1, 'material zone A contains platinum or platinum and palladium with a weight ratio Pt:Pd of . and, starting from end face ‘a’ or starting from end face ‘b’, extends along 70 to 100% of the length L, and'}material zone B contains palladium or platinum and palladium and, starting from end face extends along a portion of the length L, andmaterial zone C contains SCR-active material and, starting from end face ‘a’, extends along a portion of the length L,wherein material zone C is arranged above material zone A.2. Catalyst according to claim 1 , characterized in that material zone A contains platinum or platinum and palladium with a weight ratio of 20:1 to 1:1.3. Catalyst according to claim 1 , characterized in that material zone B contains palladium or platinum and palladium with a weight ratio of 3:1 to 1:12.4. Catalyst according to claim 1 , characterized in that material zone A comprises platinum and a transition metal oxide.5. Catalyst according to claim 4 , characterized in that platinum is present in a quantity of 0.05 to 4.0 wt % claim 4 , and the transition metal oxide is present in quantities of 0.5 to 15 wt % claim 4 , each with respect to the weight of material zone A.6. Catalyst according to claim 4 , characterized in that the transition metal oxide is CuO claim 4 , where 0 Подробнее

Exhaust System Without a DOC Having an ASC Acting as a DOC in a System with an SCR Catalyst Before the ASC

Catalyst articles having a first zone containing a first SCR catalyst and a second zone containing an ammonia slip catalyst (ASC), where the ammonia slip catalyst contains a second SCR catalyst and an oxidation catalyst, and the ASC has DOC functionality, where the first zone is located on the inlet side of the substrate and the second zone is located in the outlet side of the substrate are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases, in reducing the amount of ammonia slip and in oxidizing organic residues. Exhaust systems containing the catalyst articles and methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced and hydrocarbon are oxidized by the ASC catalyst, are also described. 1. An exhaust system comprising:a. a catalyst article comprising a substrate comprising an inlet end and an outlet, a first zone comprising a first SCR catalyst and a second zone comprising an ammonia slip catalyst (ASC), wherein the ammonia slip catalyst comprises a second SCR catalyst and an oxidation catalyst, wherein the first zone is located on the inlet side of the substrate and the second zone is located in the outlet side of the substrate; and{'sub': 3', '3', '3', '3, 'b. a first means for forming NHin the exhaust gas or introducing NHinto an exhaust stream, where the first means for forming NHin the exhaust stream or introducing NHinto the exhaust stream is located before the catalytic article.'}2. The exhaust system of claim 1 , further comprising a CSF or an SCRF claim 1 , where the CSF or SCRF are positioned downstream of the catalyst article and claim 1 , when the system comprises an SCRF claim 1 , a second means for forming NHin the exhaust stream or introducing NHinto the exhaust stream is located between the catalyst article and the SCRF.3. The exhaust system of claim 2 , wherein the CSF comprises a high PGM loading in the front of the CSF.4. The exhaust system ...

PASSIVE NOX ADSORBER

A passive NOadsorber is disclosed. The passive NOadsorber is effective to adsorb NOat or below a low temperature and release the adsorbed NOat temperatures above the low temperature. The passive NOadsorber comprises a noble metal and a molecular sieve having an OFF Framework Type. The invention also includes an exhaust system comprising the passive NOadsorber, and a method for treating exhaust gas from an internal combustion engine utilizing the passive NOadsorber. 1. An exhaust system for internal combustion engines comprising a passive NOadsorber and at least one additional after-treatment device(s) selected from the group consisting a selective catalytic reduction (SCR) catalyst , a particulate filter , a SCR filter , a NOadsorber catalyst , a three-way catalyst , an oxidation catalyst , and combinations thereof;{'sub': x', 'x, 'wherein the passive NOadsorber is located close to the engine and the additional after-treatment device(s) are located downstream of the passive NOadsorber; and'}{'sub': x', 'x', 'x', 'x, 'wherein the passive NOadsorber comprises a first noble metal and a molecular sieve having an OFF Framework Type, wherein said passive NOadsorber is effective to adsorb NOat or below a low temperature and release the adsorbed NOat temperatures above the low temperature.'}2. The exhaust system of wherein the first noble metal is selected from the group consisting of platinum claim 1 , palladium claim 1 , rhodium claim 1 , gold claim 1 , silver claim 1 , iridium claim 1 , ruthenium claim 1 , osmium claim 1 , and mixtures thereof.3. The exhaust system of wherein the first noble metal is palladium.4. The exhaust system of wherein the molecular sieve having an OFF Framework Type is selected from the group consisting of aluminosilicate zeolite and a metal-substituted aluminosilicate zeolite.5. The exhaust system of wherein the molecular sieve having an OFF Framework Type is selected from the group consisting of Linde T claim 1 , LZ-217 claim 1 , RMA-4 claim 1 ...

Asc with platinum group metal in multiple layers

A catalytic article for treating an exhaust gas stream containing particulate matter, hydrocarbons, CO, and ammonia, the article may include: (a) a substrate having an inlet end and an outlet end defining an axial length; (b) a first catalyst coating including: 1 ) a platinum group metal distributed on a molecular sieve, and 2 ) a base metal distributed on a molecular sieve; and (c) a second catalyst coating including: 1 ) a platinum group metal distributed on a molecular sieve, and 2 ) a base metal distributed on a molecular sieve.

Catalyst and method for preparing catalyst

A catalyst includes LTA zeolite including copper ions, wherein a Si/Al ratio of the LTA zeolite is 2 to 50. The catalyst is coated on a honeycomb carrier or a filter. The catalyst removes NOx from a reaction gas at 100° C. or above. The catalyst has an NOx conversion rate of 80% at 450° C. or above.

BIMETALLIC CATALYSTS FOR SELECTIVE AMMONIA OXIDATION

Catalysts, methods, and systems for treating diesel engine exhaust streams are described. In one or more embodiments, the catalyst comprises a molecular sieve having a silica to alumina ratio (SAR) less than about 30, the molecular sieve including ion-exchanged copper and ion-exchanged platinum. Systems including such catalysts and methods of treating exhaust gas are also provided. 120.-. (canceled)21. A catalyst for oxidizing ammonia to nitrogen and NOx , the catalyst comprising an aluminosilicate molecular sieve having a silica-to-alumina ratio (SAR) less than 30 , the molecular sieve comprising ion-exchanged copper and ion-exchanged platinum , wherein the molecular sieve comprises a zeolite having a crystal framework type selected from FAU , MFI , MOR , BEA , HEU , and OFF , and wherein the catalyst is obtainable by a process comprising:(a) ion-exchange of copper on the molecular sieve,(b) calcination of the molecular sieve obtained in (a), and(c) ion-exchange of platinum on the molecular sieve obtained in (b).22. The catalyst of claim 21 , further comprising an amount of metallic platinum.23. The catalyst of claim 22 , wherein the aluminosilicate molecular sieve comprises a zeolite having a crystal framework type selected from FAU claim 22 , MFI claim 22 , MOR and BEA.24. The catalyst of claim 21 , wherein the aluminosilicate molecular sieve comprises a zeolite having a crystal framework type FAU and the zeolite has a SAR less than 10.25. The catalyst of claim 21 , wherein the aluminosilicate molecular sieve comprises a zeolite having a crystal framework type FAU and the zeolite has a SAR less than 6.26. The catalyst of claim 21 , wherein the catalyst is coated on a refractory ceramic support.27. The catalyst of claim 26 , wherein the total loading of the molecular sieve in the substrate is in the range of 18.3 g/1l (0.3 g/in3) and 183 g/1l (3.0 g/in3) claim 26 , based on the total catalyst volume.28. The catalyst of claim 21 , wherein the platinum particle size ...

Process for producing a catalyst and catalyst article

A process for producing a ceramic catalyst involves the steps of: a) providing functional particles having a catalytically inactive pore former as a support surrounded by a layer of a catalytically active material, b) processing the functional particles with inorganic particles to form a catalytic composition, c) treating the catalytic composition thermally to form a ceramic catalyst, wherein the ceramic catalyst comprises at least porous catalytically inactive cells which are formed by the pore formers in the functional particles, which are embedded in a matrix comprising the inorganic particles, which form a porous structure and which are at least partly surrounded by an active interface layer comprising the catalytically active material of the layer of the functional particles. An SCR catalyst produced in by this method has an improved NO x conversion rate compared to a conventionally produced SCR catalyst.