发明名称 |
BIMODAL CATALYST-UREA SCR SYSTEM FOR ENHANCED NOx CONVERSION AND DURABILITY |
摘要 |
The present invention discloses a method for reducing NO<SUB>x </SUB>in exhaust gases of an internal combustion engine. The purpose of this invention is to convert engine out NO<SUB>x </SUB>(approximately 90% NO in diesel exhaust) into roughly a 50:50 mixture of NO and NO<SUB>2</SUB>, while simultaneously oxidizing engine-out hydrocarbons which interfere with the reduction of NO<SUB>x </SUB>by urea or ammonia. The present invention demonstrates that a 50:50 blend of NO and NO<SUB>2 </SUB>is reduced more rapidly and with higher efficiency than a gas stream which is predominantly NO. In addition, catalyst in an engine exhaust that is a 50:50 mixture of NO and NO<SUB>2 </SUB>is far more resistant to hydrothermal deterioration than using NO alone. In another embodiment of the present invention, a vehicle exhaust system utilizing the method of the present invention is provided.
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申请公布号 |
US2005112045(A1) |
申请公布日期 |
2005.05.26 |
申请号 |
US20040904444 |
申请日期 |
2004.11.10 |
申请人 |
FORD GLOBAL TECHNOLOGIES, LLC |
发明人 |
MONTREUIL CLIFFORD N.;THEIS JOSEPH R. |
分类号 |
F01N3/035;F01N3/20;F01N3/28;F01N13/02;F01N13/04;(IPC1-7):B01J8/02;C01B21/00;C01B23/00;C01B25/00;C01G28/00;C01G30/00;C01B31/00;C01B33/00;C01B35/00;F01N3/00 |
主分类号 |
F01N3/035 |
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