发明授权
- 专利标题: Removal of particulates from the exhaust gas of internal combustion engines operated with a predominantly stoichiometric air/fuel mixture
- 专利标题(中): 以主要为化学计量的空气/燃料混合物运行的内燃机废气中的颗粒物的去除
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申请号: US12239124申请日: 2008-09-26
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公开(公告)号: US08066963B2公开(公告)日: 2011-11-29
- 发明人: Raoul Klingmann , Martin Roesch , Dieter Lindner
- 申请人: Raoul Klingmann , Martin Roesch , Dieter Lindner
- 申请人地址: DE Hanau
- 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
- 代理机构: Smith, Gambrell & Russell, LLP
- 优先权: DE102007046158 20070927
- 主分类号: B01J8/00
- IPC分类号: B01J8/00 ; B01J23/44 ; B01J23/46
摘要:
The exhaust gas of internal combustion engines operated with a predominantly stoichiometric air/fuel mixture contains, as well as the gaseous hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOx) pollutants, also ultrafine particulates. There is disclosed a catalytically active particulate filter, an exhaust gas cleaning system and a process for cleaning the exhaust gases of predominantly stoichiometrically operated internal combustion engines, as well as the gaseous CO, HC and NOx pollutants, also for removing particulates from the exhaust gas. The particulate filter comprises a filter body and a catalytically active coating consisting of two layers. Both layers contain alumina. The first layer contains palladium. The second layer contains rhodium. The latter is disposed above the first layer.