[특허]Exhaust gas cleaner and method for removing nitrogen oxides

[미국특허] Exhaust gas cleaner and method for removing nitrogen oxides 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01J-008/02
출원번호	US-0295012 (1994-08-24)
우선권정보	JP0234200 (1993-08-26)
발명자 / 주소	Miyadera Tatsuo,JPX Yoshida Kiyohide,JPX
출원인 / 주소	KOCAT Inc., KRX
대리인 / 주소	Browdy and Neimark
인용정보	피인용 횟수 : 29 인용 특허 : 8

초록 ▼

Nitrogen oxides are removed from an exhaust gas containing nitrogen oxides and oxygen in a proportion larger than its stoichiometric proportion relative to unburned components in the exhaust gas, by (i) disposing an exhaust gas cleaner in a flow path, the exhaust gas cleaner comprising a first catalyst composed of 0.2-20 parts by weight (on a metal basis) of silver or silver oxide supported on a porous inorganic oxide, and a second catalyst composed of 1-50 parts by weight (on an oxide basis) of tungsten and/or vanadium supported on a porous inorganic oxide; (ii) introducing oxygen-containing organic compounds having 2 or more carbon atoms or a fuel containing the oxygen-containing organic compounds into the exhaust gas on the upstream side of the exhaust gas cleaner; and (iii) bringing the exhaust gas into contact with the exhaust gas cleaner at a temperature of 150-650.degree. C., thereby causing a reaction of the nitrogen oxides with the oxygen-containing organic compounds to remove the nitrogen oxides.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for removing nitrogen oxides from an exhaust gas containing oxygen in a proportion larger than the stoichiometric proportion of said oxygen relative to unburned components in said exhaust gas, comprising the steps of:(i) disposing an exhaust gas cleaner in a flow path of said exhaust gas, said exhaust gas cleaner consisting essentially of a first catalyst consisting essentially of 0.2-20 parts by weight on a metal basis of silver or silver oxide supported on 100 parts by weight of a porous inorganic oxide selected from the group consisting of .gamma.-alumina and a composite oxide containing .gamma.-alumina, and a second catalyst consisting essentially of of 1-50 parts by weight on an oxide basis of at least one oxide selected from the group consisting of tungsten oxide and vanadium oxide supported on 100 parts by weight of a porous inorganic oxide selected from the group consisting of titania, alumina and a composite oxide containing titania;(ii) introducing oxygen-containing inorganic compounds having two or more carbon atoms or a fuel containing said oxygen-containing organic compounds into said exhaust gas on an upstreamside of said exhaust gas cleaner; and(iii) bringing said exhaust gas into contact with said exhaust gas cleaner at a temperature of 150-650.degree. C., thereby causing a reaction of said nitrogen oxides with said oxygen-containing organic compounds to remove said nitrogen oxides.

이 특허에 인용된 특허 (8) 인용/피인용 타임라인 분석

Domesle Rainer (Maintal DEX) Engler Bernd (Hanau DEX) Koberstein Edgar (Alzenau DEX) Vlker Herbert (Hanau DEX), Apparatus for the purification of exhaust gas from diesel motors.
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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.
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Muramatsu, Gyo; Abe, Akira; Yoshida, Kiyohide; Sumiya, Satoshi; Matsumura, Nobuyuki; Takahashi, Yoshikazu, Exhaust gas cleaner and method of 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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McCabe Robert W. (Lathrup Village MI) Mitchell Patricia J. (Troy MI), Method of simultaneous oxidation of carbon monoxide and unburned fuel in methanol vehicle exhaust.
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Addiego William P. (Corning NY) Swaroop Srinivas H. (Painted Post NY) Williams Jimmie L. (Painted Post NY) Wusirika Raja R. (Painted Post NY), Multi-stage TWC system.
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Nishikawa Eiichiroh (Ohi JA) Itoh Takuji (Sayama JA) Kamiyama Setsuo (Ohi JA), Process for reducing nitrogen oxides from flue gas.
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이 특허를 인용한 특허 (29) 인용/피인용 타임라인 분석

Golden, Stephen J.; Iretskaya, Svetlana, Ammonia SCR catalyst and method of using the catalyst.
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Golden, Stephen J.; Iretskaya, Svetlana, Ammonia SCR catalyst and method of using the catalyst.
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Viola, Michael B., Apparatus and method to inject a reductant into an exhaust gas feedstream.
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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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Hancu, Dan; Donald, Jr., Whisenhunt Wayne; Benjamin, Winkler Hale; Benjamin, Wood Rue; Hrishikesh, Keshavan, Catalyst and method of manufacture.
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Lewis, Larry Neil; Winkler, Benjamin Hale; Hancu, Dan; Norton, Daniel George; Mhadeshwar, Ashish Balkrishna, Catalyst and method of manufacture.
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Lewis, Larry Neil; Winkler, Benjamin Hale; Hancu, Dan; Norton, Daniel George; Mhadeshwar, Ashish Balkrishna, Catalyst and method of manufacture.
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Yin, Ming; Lewis, Larry Neil; Siclovan, Oltea Puica; Hancu, Dan; Winkler, Benjamin Hale; Norton, Daniel George; Mhadeshwar, Ashish Balkrishna, Catalyst and method of manufacture.
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Hancu,Dan; Male,Jonathan Lloyd; Redline,Jennifer Kathleen; Buddle,Stanlee Teresa; Rocha,Teresa Grocela; Palmatier,Alison Liana; Wood,Benjamin Rue; Rijssenbeek,Job Thomas, Catalyst system and method for the reduction of NO.
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Fisher, Galen B.; DiMaggio, Craig L.; Rahmoeller, Ken M.; Sellnau, Mark C., Dual catalyst NOx reduction system for exhaust from lean burn internal combustion engines.
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Bono, Robert; Malyala, Rajashekharam V.; Miller, Alec; Golden, Stephen J., Emission reduction method for use with a heat recovery steam generation system.
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Suzuki, Norihiko; Mori, Takeshi; Hosoe, Hiroki; Ishizaki, Keita, Exhaust gas cleaner.
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Malyala, Rajashekharam; Iretskaya, Svetlana; Golden, Stephen J., High temperature ammonia SCR catalyst and method of using the catalyst.
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Parrish, Clyde F., High temperature decomposition of hydrogen peroxide.
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Parrish, Clyde F., High temperature decomposition of hydrogen peroxide.
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Parrish, Clyde F., High temperature decomposition of hydrogen peroxide.
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Cho, Byong K.; Baik, Joon-Hyun, Hybrid catalyst for NOx reduction using fuel hydrocarbons as reductant.
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Lewis, Larry Neil; Whisenhunt, Jr., Donald Wayne; Hancu, Dan; Mhadeshwar, Ashish Balkrishna; Winkler, Benjamin Hale; Norton, Daniel George; Siclovan, Oltea Puica; Yin, Ming, Manufacture of catalyst compositions and systems.
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Viola,Michael B., Method and apparatus to control injection of a reductant into an exhaust gas feedstream.
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Schmieg, Steven J.; Blint, Richard J.; Deng, Ling; Viola, Michael B.; Lee, Jong-Hwan, Method and apparatus to selectively reduce NO.
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Siclovan, Oltea Puica; Norton, Daniel George; Lewis, Larry Neil; Hancu, Dan; Bao, Xiaoying; Burch, Robert; Hardacre, Christopher; Chansai, Sarayute, Method for preparing a catalyst composition suitable for removing sulfur from a catalytic reduction system.
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Hancu, Dan; Winkler, Benjamin Hale; Wood, Benjamin Rue; Norton, Daniel George, Multi-component catalyst system and method for the reduction of NO.
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Ramachandran, Bala; Choi, Sukwon; Gartside, Robert J., Olefin double bond isomerization catalyst with high poison resistance.
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Park, Paul Worn; Hester, Virgil Raymond; Ragle, Christie Susan; Boyer, Carrie L., Silver doped catalysts for treatment of exhaust.
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Park,Paul Worn; Boyer,Carrie L., Silver doped catalysts for treatment of exhaust.
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Kass,Michael Delos; Graves,Ronald Lee; Storey,John Morse Elliot; Lewis, Sr.,Samuel Arthur; Sluder,Charles Scott; Thomas,John Foster, Stripping ethanol from ethanol-blended fuels for use in NOSCR.
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Lewis, Larry Neil; Hancu, Dan; Siclovan, Oltea Puica; Yin, Ming, Templated catalyst composition and associated method.
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Yin, Ming; Lewis, Larry Neil; Hancu, Dan; Siclovan, Oltea Puica, Templated catalyst composition and associated method.
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Koermer, Gerald, Treatment of power utilities exhaust.
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A	생활필수품
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A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Exhaust gas cleaner and method for removing nitrogen oxides 원문보기