发明名称 |
REDUCTION OF NOX EMISSIONS USING A STAGED SILVER/ALUMINA CATALYST SYSTEM |
摘要 |
The hydrocarbon-assisted, selective catalytic reduction of Nox constituents in lean-burn engine exhaust is benefited by passage of the exhaust over a staged catalyst bed comprising a first stage of an alumina-supported silver catalyst for oxidation of NO to NO2 and partial oxidation of added hydrocarbon to an aldehyde. Downstream of the silver catalyst is a second catalyst selected for the reaction of hydrocarbon and aldehyde species with NO2 to reduce it to nitrogen. Gamma-alumina and BaY zeolite are examples of suitable second stage catalysts.
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申请公布号 |
WO2007018990(A3) |
申请公布日期 |
2007.10.18 |
申请号 |
WO2006US27998 |
申请日期 |
2006.07.19 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
LEE, JONG-HWAN |
分类号 |
B01D53/56;B01D53/86 |
主分类号 |
B01D53/56 |
代理机构 |
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