[특허]Method and apparatus for emission control

Method and apparatus for emission control 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01N-003/00
출원번호	US-0413669 (1999-10-06)
발명자 / 주소	Matros Yurii Sh. Bunimovich Grigori A. Strots Vadim O.
출원인 / 주소	Matros Technologies, Inc.
대리인 / 주소	Fishel
인용정보	피인용 횟수 : 132 인용 특허 : 21

초록 ▼

A converter for purifying exhaust gases from lean-burn engines, in particular for controlling the amount of NO.sub.x and soot from a diesel engine in transient operation such as a vehicle. The converter contains a catalyst bed with a catalyst effective for NO.sub.x reduction with a chemical reductant when the catalyst bed is with a certain temperature window and when the ratio between the molar amount of chemical reductant and NO.sub.x is above a certain minimum ratio. The catalyst bed is heated or cooled to a temperature within the temperature window and a switching valve is provided for reverse flowing the exhaust gases through the converter to maintain the catalyst bed at a temperature within the temperature window for a longer time than is possible with a conventional non-flow-reversing converter. A reductant delivery system adds chemical reductant to the exhaust gases in an appropriate amount so that the ratio between the molar amount of chemical reductant and NO.sub.x is above the certain minimum ratio when the exhaust gases pass over the catalyst bed. A soot trap may be provided in series with the catalyst bed in the converter, said reverse flowing of the exhaust gases through converter heating and continuously maintaining the soot trap at or above the ignition temperature of the soot.

대표청구항 ▼

[ What is claimed:] [1.]1. A method for substantially reducing the amount of NO.sub.x in exhaust gases from a fossil-fueled engine, using lean-burn combustion, said exhaust gases containing NO.sub.x and other noxious materials including hydrocarbons, carbon monoxide, carbonaceous particulate matter and mixtures thereof, the method comprising(a) selecting a catalyst which is effective for NO.sub.x reduction to N.sub.2 in an oxidizing environment through the reaction of NO.sub.x with a chemical reductant, said catalyst being effective with regards to said NO.sub.x reduction within a certain temperature window and at a molar ratio between the amounts of chemical reductant and NO.sub.x above a certain minimum ratio at which said catalyst is effective with respect to NO.sub.x reduction,(b) passing the exhaust gases through a converter including a catalyst bed with said catalyst,(c) heating up or cooling down the catalyst bed thereby maintaining the temperature inside the catalyst bed within the temperature window at which the catalyst is effective with respect to NO.sub.x reduction,(d) adding a chemical reductant to the exhaust gases thereby maintaining the ratio between the molar amounts of chemical reductant and NO.sub.x above the certain minimum ratio at which said catalyst is effective with respect to NO.sub.x reduction,(e) periodically reversing the flow of the exhaust gases through the catalyst bed thereby improving the catalyst bed heat retaining ability and extending the time during which the catalyst bed is within the temperature window at which the catalyst is effective with regards to NO.sub.x reduction.

이 특허에 인용된 특허 (21)

Rembold Helmut (Stuttgart DEX) Dettling Hubert (Waiblingen DEX) Stutzenberger Heinz (Vaihingen DEX), Arrangement for treatment of exhaust gases for a compression-ignition internal combustion engine.
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Kharas Karl C. C., Copper-silver zeolite catalysts.
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Chattha Mohinder S. ; Hoost Tjenga E. ; Kudla Robert J., Diesel emission treatment using precious metal on titania aerogel.
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Tops.o slashed.e Haldor Frederik Axel,DKX, Method and catalyst unit for treating diesel engine exhaust.
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Kawaguchi Akio (Susono JPX), Method for regenerating a particulate collection filter and an exhaust emission control system with a particulate collec.
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Eshita Akinori (Shinnanyo JPX) Kasahara Senshi (Shinnanyo JPX) Matsumoto Shinichi (Aichi JPX) Ishibashi Kazunobu (Toyota JPX) Yokota Koji (Nagoya JPX) Kondoh Shiroh (Aichi JPX), Method of purifying oxygen-excess exhaust gas.
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Kharas Karl C. C. ; Henk Michael George ; Robota Heinz Juergen, Reduction of NO.sub.x in the exhaust gases from internal combustion engines containing excess oxygen.
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Cooper Barry J. (Radnor PA) Jung Hyun J. (Wayne PA) Thoss James E. (West Chester PA), Treatment of diesel exhaust gases.
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Feeley Jennifer S. ; Deeba Michel ; Farrauto Robert J. ; Dang Dinh, Trimetallic zeolite catalyst and method of NO.sub.x abatement using the same.
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Winkler, Benjamin Hale; Hancu, Dan; Mhadeshwar, Ashish Balkrishna, Systems and methods for enhanced selective catalytic reduction of NOx.
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Frederiksen, Stephen, Temperature control circuit for SCR urea system.
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Tumati, Prasad; Nohl, John P.; Crawley, Wilbur H., Thermal management of exhaust systems.
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Geveci, Mert; Osburn, Andrew W., Transient compensation control of an SCR aftertreatment system.
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Stanavich, John; Adams, William; Alexander, Daniel; Golin, Michael, Vertical ultrasonic decomposition pipe.
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Bailey,John M., Wall flow particulate trap system.
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Narula, Chaitanya K.; Yang, Xiaofan, Zeolite-based SCR catalysts and their use in diesel engine emission treatment.
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Narula, Chaitanya K.; Yang, Xiaofan, Zeolite-based SCR catalysts and their use in diesel engine emission treatment.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Method and apparatus for emission control 원문보기

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Method and apparatus for emission control 원문보기

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