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특허 상세정보

Catalytic reduction of nitrogen oxides in methane-fueled engine exhaust by controlled methane injections

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01N-003/18    F01N-003/36   
미국특허분류(USC) 60/274 ; 60/276 ; 60/285 ; 60/286
출원번호 US-0330158 (1994-10-27)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 61  인용 특허 : 0
초록

Nitrogen oxides are removed from the exhaust of an internal combustion engine which operates on a methane-containing fuel by reacting the nitrogen oxides and oxygen in the exhaust gas with a controlled amount of methane in the presence of a reducing catalyst. The catalyst preferably comprises a crystalline zeolite having a silicon to aluminum ratio of equal to or greater than about 2.5 which is prepared from a non-acid zeolite which is ion exchanged with a cation selected from the group consisting of cobalt, nickel, iron, chromium, and manganese. Methane...

대표
청구항

A method for controlling the reduction of nitrogen oxides in an exhaust gas from a methane-fueled internal combustion engine, wherein said exhaust gas contains oxygen, methane, and said nitrogen oxides, said method comprising: (a) selecting a catalyst capable of reducing nitrogen oxides with methane in the presence of oxygen in said exhaust gas; (b) determining the reaction characteristics of said catalyst including the degree of nitrogen oxide reduction as a function of temperature and as a function of the molar ratio of methane to nitrogen oxides in sa...

이 특허를 인용한 특허 피인용횟수: 61

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