|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||60/274 ; 60/276 ; 60/285 ; 60/286|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 61 인용 특허 : 0|
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...
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...