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RU2018103916A - ПАССИВНЫЙ NOx-АДСОРБЕР - Google Patents

ПАССИВНЫЙ NOx-АДСОРБЕР Download PDF

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Publication number
RU2018103916A
RU2018103916A RU2018103916A RU2018103916A RU2018103916A RU 2018103916 A RU2018103916 A RU 2018103916A RU 2018103916 A RU2018103916 A RU 2018103916A RU 2018103916 A RU2018103916 A RU 2018103916A RU 2018103916 A RU2018103916 A RU 2018103916A
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Russia
Prior art keywords
passive
adsorber
catalyst
molecular sieve
paragraphs
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RU2018103916A
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English (en)
Inventor
Джиллиан Элэйн КОЛЛИР
Саньюань ЯН
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Джонсон Мэтти Паблик Лимитед Компани
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Publication of RU2018103916A publication Critical patent/RU2018103916A/ru

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    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
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    • B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
    • B01J29/74—Noble metals
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Claims (25)

1. Пассивный NOx-адсорбер, эффективно адсорбирующий NOx при низкой температуре или ниже нее и высвобождающий адсорбированный NOx при температурах выше указанной низкой температуры, причем указанный пассивный NOx-адсорбер включает первый благородный металл и молекулярное сито, имеющее структуру типа LTL.
2. Пассивный NOx-адсорбер по п.1, в котором первый благородный металл выбирается из группы, состоящей из платины, палладия, родия, золота, серебра, иридия, рутения, осмия, или их смесей.
3. Пассивный NOx-адсорбер по п.1, в котором первый благородный металл представляет собой палладий.
4. Пассивный NOx-адсорбер по любому из пп. 1-3, в котором молекулярное сито, имеющее структуру типа LTL, выбирается из группы, состоящей из алюмосиликатного цеолита, алюмофосфатного цеолита, силикоалюмофосфатного (SAPO) цеолита, и металлозамещенного алюмосиликатного или алюмофосфатного цеолита.
5. Пассивный NOx-адсорбер по любому из пп. 1-3, в котором молекулярное сито, имеющее структуру тира LTL, выбирается из группы, состоящей из цеолита L, цеолита Linde Type L, галлосиликата L, LZ-212, SAPO LTL-типа, и перлиалитного цеолита.
6. Пассивный NOx-адсорбер по любому из пп. 1-5, причем пассивный NOx-адсорбер нанесен в виде покрытия на проницаемую для потока или фильтрационную подложку.
7. Пассивный NOx-адсорбер по любому из пп. 1-5, причем пассивный NOx-адсорбер экструдирован с образованием проницаемой для потока или фильтрационной подложки.
8. Пассивный NOx-адсорбер по любому из пп. 1-7, дополнительно включающий второй молекулярно-ситовый катализатор, причем второй молекулярно-ситовый катализатор содержит второй благородный металл и второе молекулярное сито, причем второе молекулярное сито не имеет структуру типа LTL.
9. Пассивный NOx-адсорбер по п.8, в котором первый благородный металл и второй благородный металл независимо выбираются из группы, состоящей из платины, палладия, родия, золота, серебра, иридия, рутения, осмия, или их смесей.
10. Пассивный NOx-адсорбер по п.8, в котором как первый благородный металл, так и второй благородный металл представляют собой палладий.
11. Пассивный NOx-адсорбер по любому из пп. 8-10, в котором второе молекулярное сито представляет собой мелкопористое, среднепористое или крупнопористое молекулярное сито, выбранное из группы структурных типов, состоящей из ACO, AEI, AEN, AFN, AFT, AFX, ANA, APC, APD, ATT, CDO, CHA, DDR, DFT, EAB, EDI, EPI, ERI, GIS, GOO, IHW, ITE, ITW, LEV, KFI, MAZ, MER, MON, NSI, OFF, OWE, PAU, PHI, RHO, RTH, SAT, SAV, SFW, SIV, THO, TSC, UEI, UFI, VNI, YUG, ZON, BEA и MFI, и сростков двух или более из них.
12. Пассивный NOx-адсорбер по п.11, в котором мелкопористое молекулярное сито выбирается из группы структурных типов, состоящей из AEI и CHA.
13. Пассивный NOx-адсорбер по любому из пп. 8-12, причем пассивный NOx-адсорбер нанесен в виде покрытия на проницаемую для потока или фильтрационную подложку.
14. Пассивный NOx-адсорбер по любому из пп. 8-13, имеющий первый слой и второй слой, причем первый слой включает первый благородный металл и молекулярное сито, имеющее структуру типа LTL, и второй слой включает второй молекулярно-ситовый катализатор.
15. Пассивный NOx-адсорбер по любому из пп. 8-13, имеющий первую зону и вторую зону, причем первая зона включает первый благородный металл и молекулярное сито, имеющее структуру типа LTL, и вторая зона включает второй молекулярно-ситовый катализатор.
16. Пассивный NOx-адсорбер по любому из пп. 1-15, в котором низкая температура составляет 250°С.
17. Выхлопная система для двигателей внутреннего сгорания, содержащая пассивный NOx-адсорбер по любому из пп. 1-16 и каталитический компонент, выбранный из группы, состоящей из катализатора селективного каталитического восстановления (SCR), сажевого фильтра, SCR-фильтра, NOx-адсорбционного катализатора, трехкомпонентного катализатора, катализатора окисления, и их комбинаций.
18. Способ сокращения количества NOx в выхлопном газе, причем указанный способ включает адсорбирование NOx на пассивном NOx-адсорбере по любому из пп. 1-15 при низкой температуре или ниже нее, термическое десорбирование NOx с пассивного NOx-адсорбера при температуре выше указанной низкой температуры, и каталитическое удаление десорбированного NOx на каталитическом компоненте ниже по потоку относительно пассивного NOx-адсорбера.
19. Способ по п.18, в котором каталитический компонент выбирается из группы, состоящей из катализатора селективного каталитического восстановления (SCR), сажевого фильтра, SCR-фильтра, NOx-адсорбционного катализатора, трехкомпонентного катализатора, катализатора окисления, и их комбинаций.
20. Способ по п.18 или п.19, в котором низкая температура составляет 250°С.
21. Катализатор, содержащий подложку, дизельный катализатор окисления и пассивный NOx-адсорбер по любому из пп. 1-15, в котором пассивный NOx-адсорбер по любому из пп. 1-15 размещен на первой зоне или первом слое на подложке, и дизельный катализатор окисления размещается на второй зоне или втором слое на подложке.
22. Катализатор по п.21, в котором первая зона размещена выше по потоку относительно второй зоны.
23. Катализатор по п.21, в котором первая зона размещена ниже по потоку относительно второй зоны.
24. Катализатор по п.21, в котором первый слой размещен на подложке, и второй слой размещен на первом слое.
25. Катализатор по п.21, в котором второй слой размещен на подложке, и первый слой размещен на втором слое.
RU2018103916A 2015-07-02 2016-06-27 ПАССИВНЫЙ NOx-АДСОРБЕР RU2018103916A (ru)

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