IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0073824
(1998-05-07)
|
우선권정보 |
JP-0121925 (1994-11-05) |
발명자
/ 주소 |
- Yoshida Kiyohide,JPX
- Muramatsu Gyo,JPX
- Sumiya Satoshi,JPX
|
출원인 / 주소 |
- Kabushiki Kaisha Riken, JPX
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
7 |
초록
▼
An exhaust gas cleaner consisting essentially of a first catalyst consisting essentially of a first porous inorganic oxide supporting 1.6-8.7 weight percent of an Ag component, on a metal basis, and a second catalyst consisting essentially of a second porous inorganic oxide supporting 0.1-3.8 weight
An exhaust gas cleaner consisting essentially of a first catalyst consisting essentially of a first porous inorganic oxide supporting 1.6-8.7 weight percent of an Ag component, on a metal basis, and a second catalyst consisting essentially of a second porous inorganic oxide supporting 0.1-3.8 weight percent of a Pt component and 1-9.9 weight percent of a W component, each weight percent on a metal basis. The Ag component includes Ag or a compound thereof. The Pt component includes Pt, Pd, Ru, Rh, Ir, and Au. The W component includes W, V, Mn, Mo, Nb, and Ta.
대표청구항
▼
[ What is claimed is:] [1.] An exhaust gas cleaner for removing nitrogen oxides by reduction and unburned components of carbon monoxide and hydrocarbons by oxidation from an exhaust gas discharged from a stationary combustion apparatus, a gasoline engine or a diesel engine and containing nitrogen ox
[ What is claimed is:] [1.] An exhaust gas cleaner for removing nitrogen oxides by reduction and unburned components of carbon monoxide and hydrocarbons by oxidation from an exhaust gas discharged from a stationary combustion apparatus, a gasoline engine or a diesel engine and containing nitrogen oxides and oxygen in an amount greater than the stoichiometric amount of oxygen required for completely oxidizing said unburned components in said exhaust gas, wherein said exhaust gas cleaner consists essentially of:(a) a first catalyst disposed on an inlet side of said exhaust gas cleaner, said first catalyst consisting essentially of a first porous inorganic oxide supporting 1.6 to 8.7% by weight % of at least one silver component selected from the group consisting of Ag and compounds thereof, the weight percentage being expressed on the basis of the metal; and(b) a second catalyst disposed on an outlet side of said exhaust gas cleaner, said second catalyst consisting essentially of a second porous inorganic oxide supporting 0.1-3.8 weight % of at least one noble metal component selected from the group consisting of Pt, Pd, Ru, Rh, Ir, and Au and 9.9 weight % of at least one base metal component selected from the group consisting of W, V, Mn, Mo, Nb, and Ta, each weight percentage being expressed on the basis of the metal;said first porous inorganic oxide being at least one ceramic selected from the group consisting of alumina and alumina-based composite oxides containing at least one of silica, titania, and zirconia and having an alumina content of 50 weight % or more; andsaid second porous inorganic oxide being at least one ceramic selected from the group consisting of titania, alumina, zirconia, silica, and composite oxides thereof.
이 특허에 인용된 특허 (7)
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Kato Yasuyoshi (Kure JPX) Konishi Kunihiko (Kure JPX) Nakajima Fumito (Kure JPX) Hamada Ikuhisa (Kure JPX) Morita Isato (Kure JPX), Catalyst for purifying exhaust gas.
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Asano Mitsuru (Okazaki JA) Ohta Minoru (Anjo JA) Oki Masami (Nagoya JA), Catalyst for purifying exhaust gas from vehicles.
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Evans William D. J. (Newton GB2) Larbey Robert J. (Bassingbourn GB2) Stewart Thomas I. (Melbourn GB2), Catalysts.
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Hindin Saul G. (Mendham NJ) Dettling Joseph C. (Jackson NJ), Compositions and methods for high temperature stable catalysts.
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Muramatsu Gyo (Kumagaya JPX) Yoshida Kiyohide (Kumagaya JPX) Sumiya Satoshi (Kumagaya JPX) Abe Akira (Kumagaya JPX), Exhaust gas cleaner and method of cleaning exhaust gas catalyst for cleaning exhaust gas.
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Subramanian Somasundaram (Melvindale MI) Kudla Robert J. (Warren MI) Chattha Mohinder S. (Northville MI), Exhaust treating system for lean-burn CNG engine.
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Leyrer Juergen (Alzenau DEX) Lox Egbert (Hanau DEX) Engler Bernd (Hanau DEX) Domesle Rainer (Alzenau DEX), Oxidative diesel control catalyst.
이 특허를 인용한 특허 (5)
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Malyala, Rajashekharam V.; Golden, Stephen J., Catalyst and method for reducing nitrogen oxides in exhaust streams with hydrocarbons or alcohols.
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Yamada, Hiroshi; Shigetsu, Masahiko; Kawabata, Hisaya; Matsumura, Yasuhiro; Yokota, Kazuya; Ohsumi, Toshihiko; Yamauchi, Takeo; Koike, Yusuke, Catalyst device for exhaust gas purification and method for exhaust gas purification.
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Heidenreich, Steffen; Nacken, Manfred, Catalytically active porous element.
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Ragle, Christie Susan; Silver, Ronald G.; Zemskova, Svetlana Mikhailovna; Eckstein, Colleen J., Exhaust system having a gold-platinum group metal catalyst.
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Shibata, Toshiaki, Method for manufacturing honeycomb filter for purifying exhaust gases.
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