发明名称 |
Process and catalyst for reducing nitrogen oxides |
摘要 |
A process for reducing the nitrogen oxides present in a lean exhaust gas from an internal combustion engine by selective catalytic reduction on a reduction catalyst using ammonia, wherein a fraction of the nitrogen monoxide present in the exhaust gas is oxidized to nitrogen dioxide before the exhaust gas, together with ammonia, is passed over the reduction catalyst. The reduction catalyst contains a zeolite exchanged with transition metals and oxidation of the nitrogen monoxide is performed in such a way that the exhaust gas contains 30 to 70 vol. % of nitrogen dioxide before contact with the reduction catalyst.
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申请公布号 |
US2002039550(A1) |
申请公布日期 |
2002.04.04 |
申请号 |
US20010838119 |
申请日期 |
2001.04.20 |
申请人 |
SCHAFER-SINDLINGER ADOLF;PFEIFER MARCUS;SPURK PAUL;DEMEL YVONNE;KREUZER THOMAS;LOX EGBERT |
发明人 |
SCHAFER-SINDLINGER ADOLF;PFEIFER MARCUS;SPURK PAUL;DEMEL YVONNE;KREUZER THOMAS;LOX EGBERT |
分类号 |
F01N3/08;B01D53/34;B01D53/56;B01D53/74;B01D53/86;B01D53/94;B01J8/02;B01J21/00;B01J23/80;B01J29/06;B01J29/064;B01J29/072;B01J29/076;B01J29/46;B01J35/04;B01J37/02;B01J37/30;C01B21/00;C01B21/04;F01N3/10;F01N3/20;F01N3/28;(IPC1-7):B01D53/56 |
主分类号 |
F01N3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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