发明申请
US20130004391A1 REDUCTION-CATALYST-COATED DIESEL PARTICLE FILTER HAVING IMPROVED CHARACTERISTICS
有权
具有改进特性的减少催化涂层的柴油颗粒过滤器
- 专利标题: REDUCTION-CATALYST-COATED DIESEL PARTICLE FILTER HAVING IMPROVED CHARACTERISTICS
- 专利标题(中): 具有改进特性的减少催化涂层的柴油颗粒过滤器
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申请号: US13583516申请日: 2011-03-30
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公开(公告)号: US20130004391A1公开(公告)日: 2013-01-03
- 发明人: Marcus Pfeifer , Stephan Basso , Franz Dornhaus
- 申请人: Marcus Pfeifer , Stephan Basso , Franz Dornhaus
- 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
- 优先权: EP10003923.9 20100414
- 国际申请: PCT/EP11/01578 WO 20110330
- 主分类号: B01D53/94
- IPC分类号: B01D53/94
摘要:
A diesel particle filter which comprises a ceramic wall flow filter substrate and two coatings is described. The first coating which is applied in the inflow channels and is composed of high-melting materials has such a nature that it closes the inflow channels and pores in the wall connecting the inflow channels and outflow channels to soot particles on the inflow side without preventing passage of the gaseous exhaust gas constituents. The second coating is introduced into the wall between inflow channels and outflow channels and is of such a nature that it can effectively catalyze the selective reduction of nitrogen oxides by means of a reducing agent. The resulting component is an SCR-catalytically active particle filter and displays excellent banking-up pressure properties combined with high filtration efficiency and good regeneration properties. Furthermore, the component displays good aging stability of the NOx conversion activity.