发明授权
- 专利标题: Method for desulfating a nitrogen oxide storage catalyst
- 专利标题(中): 氮氧化物储存催化剂脱硫方法
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申请号: US10637884申请日: 2003-08-08
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公开(公告)号: US06973775B2公开(公告)日: 2005-12-13
- 发明人: Michael Hoffmann , Harald Klein , Klaus-Ingo Prieger , Thomas Kreuzer
- 申请人: Michael Hoffmann , Harald Klein , Klaus-Ingo Prieger , Thomas Kreuzer
- 申请人地址: DE Hanau-Wolfgang
- 专利权人: Umicore AG & Co. KG
- 当前专利权人: Umicore AG & Co. KG
- 当前专利权人地址: DE Hanau-Wolfgang
- 代理机构: Kalow & Springut LLP
- 优先权: DE10238771 20020823
- 主分类号: F02D45/00
- IPC分类号: F02D45/00 ; B01D53/86 ; B01D53/94 ; F01N3/08 ; F01N3/10 ; F01N3/20 ; F01N3/24 ; F01N3/28 ; F02D41/02 ; F02D41/04 ; F02D41/38 ; F01N3/00
摘要:
The invention relates to a method for desulfating a nitrogen oxide storage catalyst that contains stored nitrogen oxides and sulfur oxides and that forms part of an exhaust gas purification system of a lean-burn engine. The method provides that, to initiate desulfation, the temperature of the catalyst is increased to the point where thermal desorption of the nitrogen oxides stored in the catalyst sets in, and the onset of thermal desorption of the nitrogen oxides is used as the signal to enrich the air/fuel mixture to perform the desulfation.
公开/授权文献
- US20040112042A1 Method for desulfating a nitrogen oxide storage catalyst 公开/授权日:2004-06-17