Pt-Pd diesel oxidation catalyst with CO/HC light-off and HC storage function
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/94
B01J-023/42
B01J-023/44
F01N-003/28
B01J-029/76
B01J-037/02
B01J-029/035
F01N-003/08
F01N-003/10
F01N-003/20
F01N-003/035
F01N-013/00
B01J-021/04
B01J-029/44
출원번호
US-0384517
(2012-04-05)
등록번호
US-9533295
(2017-01-03)
국제출원번호
PCT/US2012/032319
(2012-04-05)
§371/§102 date
20150310
(20150310)
국제공개번호
WO2013/151549
(2013-10-10)
발명자
/ 주소
Müller-Stach, Torsten W.
Punke, Alfred H.
Grubert, Gerd
Hilgendorff, Marcus
Doering, Helke
Neubauer, Torsten
Zheng, Xiaolai
Wan, Chung-Zong
Xue, Wen-Mei
Burk, Patrick
출원인 / 주소
BASF CORPORATION
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
14
초록▼
A diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) is described. More particularly, the present invention is directed to a washcoat composition comprising hig
A diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) is described. More particularly, the present invention is directed to a washcoat composition comprising high silica to alumina zeolite and platinum and palladium such that the zeolite minimizes negative interactions of these platinum group metals with the zeolite.
대표청구항▼
1. A catalytic article for treating exhaust gas emissions from a diesel engine containing hydrocarbons, carbon monoxide, and particulate matter comprising a diesel oxidation catalyst and a substrate: the diesel oxidation catalyst comprising a first washcoat layer coated on said substrate comprising
1. A catalytic article for treating exhaust gas emissions from a diesel engine containing hydrocarbons, carbon monoxide, and particulate matter comprising a diesel oxidation catalyst and a substrate: the diesel oxidation catalyst comprising a first washcoat layer coated on said substrate comprising a high-surface area refractory metal oxide support, a platinum group metal component comprising platinum (Pt) and palladium (Pd) supported on the high surface area refractory metal oxide support, and a first zeolite component having a silica to alumina ratio that is greater than 1000, or is free of alumina. 2. The catalytic article of claim 1, wherein the first zeolite component has a silica to alumina ratio that is greater than 1200. 3. The catalytic article of claim 1, wherein the first zeolite component is free of alumina. 4. The catalytic article of claim 1, wherein the first washcoat layer contains a second zeolite component. 5. The catalytic article of claim 1, wherein the first zeolite component is selected from a zeolite having the framework type beta, MFI, and MWW. 6. The catalytic article of claim 1, wherein the high surface area refractory metal oxide support comprises one of alumina, silica, titania, ceria, and zirconia, physical mixtures thereof, chemical combinations thereof, and atomically-doped combinations thereof. 7. The catalytic article of claim 6, wherein the high surface area refractory metal oxide support comprises alumina. 8. The catalytic article of claim 1, wherein a second washcoat layer is present on the first washcoat layer, the second washcoat layer comprising a high surface area refractory metal oxide support. 9. The catalytic article of claim 8, wherein the second washcoat layer further comprises a platinum group metal component supported on the high surface area refractory metal oxide support. 10. The catalytic article of claim 8, wherein a third washcoat layer is present on the second washcoat layer, the third washcoat layer comprising a high surface area refractory metal oxide support. 11. The catalytic article of claim 10, wherein the second washcoat layer, the third washcoat layer, or both further comprises a zeolite component. 12. The catalytic article of claim 1, wherein the first washcoat layer further comprises a promoter that is one or more alkaline oxides selected from barium oxide (BaO), magnesium oxide (MgO), lanthanum oxide (La2O3), and mixtures thereof. 13. The catalytic article of claim 1, wherein substrate is a flow through substrate or a wall-flow substrate. 14. A catalytic article for treating exhaust gas emissions from a diesel engine containing hydrocarbons, carbon monoxide, and particulate matter comprising a diesel oxidation catalyst and a substrate: the diesel oxidation catalyst comprising a first washcoat layer coated on said substrate and a second washcoat layer coated on the first washcoat layer, wherein one of the first and second washcoat layers comprises a high surface area refractory metal oxide support and the other of the first and second washcoat layers comprises a high surface area refractory metal oxide support, a platinum group metal component comprising platinum (Pt) and palladium (Pd) supported on the high surface area refractory metal oxide support, and a first zeolite component having a silica to alumina ratio greater than 1000, or is free of alumina. 15. The catalytic article of claim 14, wherein the first washcoat layer comprises the high surface area refractory metal oxide support. 16. The catalytic article of claim 14, wherein the second washcoat layer comprises the high surface area refractory metal oxide support. 17. The catalytic article of claim 14, wherein a third washcoat layer is present on the second washcoat layer, the third washcoat layer comprising a high surface area refractory metal oxide support and optionally a zeolite. 18. A system for treatment of a diesel engine exhaust stream including hydrocarbons, carbon monoxide, and other exhaust gas components, the emission treatment system comprising: an exhaust conduit in fluid communication with the diesel engine via an exhaust manifold;the catalytic article claim 1 wherein the substrate is a flow through substrate or a wall-flow substrate; andone or more of the following in fluid communication with the composite: a soot filter, a selective catalytic reduction (SCR) catalytic article, and a NOx storage and reduction (NSR) catalytic article. 19. A method for treating a diesel exhaust gas stream containing hydrocarbons, carbon monoxide and particulate matter, the method comprising: (a) providing the catalytic article of claim 1; (b) contacting said diesel exhaust gas stream with said catalytic article for the treatment of exhaust gas emissions so that the oxidation catalyst oxidizes hydrocarbons and carbon monoxide in the exhaust gas to carbon dioxide and water; and (c) conveying the exhaust gas exiting the diesel oxidation catalyst to a downstream soot filter and NOx conversion catalyst. 20. The method of claim 19, wherein the NOx conversion catalyst comprises a selective catalytic reduction (SCR) component located downstream of the catalyzed soot filter (CSF).
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이 특허에 인용된 특허 (14)
Koegel, Markus; Pfeifer, Marcus; Jeske, Gerald; Schuetze, Frank Walter; Frantz, Stéphanie; Kreuzer, Thomas, Catalytically coated diesel particle filter, process for producing it and its use.
Burk Patrick Lee ; Hochmuth John Karl ; Dettling Joseph Charles ; Heck Ronald Marshall ; Steger John Joseph ; Tauster Samuel Jack, Method and apparatus for treating an engine exhaust gas stream.
Ogawa Yutaka (Nagoya JPX) Asai Shoji (Nagoya JPX) Otaka Masashi (Mie JPX), Method of producing a mask to be used for the production of a ceramic filter.
Dettling Joseph C. (Jackson NJ) Mooney John J. (Wyckoff NJ) Skomoroski Robert M. (Paterson NJ) Hindin Saul G. (Mendham NJ), Monolithic catalyst member and support therefor.
Beutel, Tilman W.; Dettling, Joseph C.; Hollobaugh, Dustin O.; Mueler-Stach, Torsten W., Pt-Pd diesel oxidation catalyst with CO/HC light-off and HC storage function.
Speronello Barry K. (Belle Mead NJ) Byrne John W. (Edison NJ) Chen James M. (Edison NJ), Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same.
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