RU2015153825A - Катализатор окисления для двигателя с воспламенением от сжатия - Google Patents

Катализатор окисления для двигателя с воспламенением от сжатия Download PDF

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RU2015153825A
RU2015153825A RU2015153825A RU2015153825A RU2015153825A RU 2015153825 A RU2015153825 A RU 2015153825A RU 2015153825 A RU2015153825 A RU 2015153825A RU 2015153825 A RU2015153825 A RU 2015153825A RU 2015153825 A RU2015153825 A RU 2015153825A
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oxidation catalyst
porous oxide
catalyst according
coating
region
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RU2015153825A
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RU2721563C2 (ru
RU2015153825A3 (ru
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Эндрю Фрэнсис ЧИФФИ
Нил Роберт КОЛЛИНЗ
Джон Бенджамин ГУДВИН
Франсуа МОРО
Пол Ричард ФИЛЛИПС
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Джонсон Мэтти Паблик Лимитед Компани
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    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
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    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
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Claims (22)

1. Катализатор окисления для обработки выхлопных газов от двигателя с воспламенением от сжатия, где данный катализатор окисления содержит:
подложку;
область первого покрытия из пористого оксида, содержащего палладий (Pd) и первый материал-носитель, содержащий оксид церия; и
область второго покрытия из пористого оксида, содержащего платину (Pt) и второй материал-носитель.
2. Катализатор окисления по п.1, в котором область второго покрытия из пористого оксида дополнительно содержит палладий (Pd).
3. Катализатор окисления по п.2, в котором во втором покрытии из пористого оксида масса платины (Pt) больше, чем масса палладия (Pd).
4. Катализатор окисления по любому из предшествующих пунктов, в котором второй материал-носитель содержит огнеупорный оксид металла.
5. Катализатор окисления по п.4, в котором огнеупорный оксид металла выбран из группы, состоящей из глинозема, кремнезема, диоксида титана, диоксида циркония, оксида церия и смешанных или сложных оксидов двух или более этих оксидов.
6. Катализатор окисления по п.5, в котором огнеупорным оксидом металла является глинозем.
7. Катализатор окисления по любому из предшествующих пунктов, в котором область первого покрытия из пористого оксида содержит палладий (Pd) в количестве менее чем 2 масс.%, предпочтительно от 0,25 до 1,9 масс.%.
8. Катализатор окисления по любому из предшествующих пунктов, в котором область первого покрытия из пористого оксида является зоной первого покрытия пористым оксидом, и область второго покрытия из пористого оксида является зоной второго покрытия пористым оксидом, и в котором зона второго покрытия пористым оксидом размещена или нанесена на подложке ниже по потоку по отношению к зоне первого покрытия пористым оксидом.
9. Катализатор окисления по любому из пп.1-7, в котором область первого покрытия из пористого оксида является первым слоем из пористого оксида, и вторая область покрытия из пористого оксида является вторым слоем из пористого оксида, и в котором первый слой из пористого оксида размещен или нанесен на втором слое из пористого оксида.
10. Катализатор окисления по любому из предшествующих пунктов, в котором область второго покрытия из пористого оксида содержит платину (Pt) в количестве от 0,2 до 15 масс.%.
11. Система выпуска отработавших газов, содержащая катализатор окисления по любому из пп.1-10 и устройство регулирования выбросов.
12. Транспортное средство, содержащее двигатель с воспламенением от сжатия и:
(a) либо катализатор окисления по любому из пп.1-10;
(b) либо систему выпуска отработавших газов по п.11.
13. Применение катализатора окисления по любому из пп.1-10 для обработки выхлопных газов от двигателя с воспламенением от сжатия без образования существенного количества закиси азота (N2O).
14. Применение катализатора окисления по любому из пп.1-10 в качестве пассивного абсорбера NOx (PNA) в выхлопных газах от двигателя с воспламенением от сжатия, необязательно в комбинации с устройством регулирования выбросов.
15. Способ регулирования содержания NOx в выхлопных газах от двигателя с воспламенением от сжатия для устройства регулирования выбросов, где данный способ включает:
(a) регулирование содержания NOx в выхлопных газах посредством контактирования выхлопных газов с катализатором окисления по любому из пп.1-10, с получением обработанных выхлопных газов; и
(b) пропускание обработанных выхлопных газов в устройство регулирования выбросов.
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