Invention Grant
- Patent Title: Removal of particulates from the exhaust gas of internal combustion engines operated with a predominantly stoichiometric air/fuel mixture
- Patent Title (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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Application No.: US12678431Application Date: 2008-04-16
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Publication No.: US08640440B2Publication Date: 2014-02-04
- Inventor: Raoul Klingmann , Martin Roesch , Dieter Lindner
- Applicant: Raoul Klingmann , Martin Roesch , Dieter Lindner
- Applicant Address: DE Hanau-Wolfgang
- Assignee: Umicore AG & Co. KG
- Current Assignee: Umicore AG & Co. KG
- Current Assignee Address: DE Hanau-Wolfgang
- Agency: Smith, Gambrell & Russell, LLP
- Priority: EP07019107 20070928
- International Application: PCT/EP2008/003015 WO 20080416
- International Announcement: WO2009/043390 WO 20090409
- Main IPC: F01N3/00
- IPC: F01N3/00 ; B01D53/00 ; B01J8/00 ; C01B21/00 ; C01B23/00 ; C01B25/00 ; C01B31/00 ; C01B33/00 ; C01B35/00 ; C01G28/00 ; C01G30/00 ; B01D50/00 ; B01D53/34 ; B01J23/00 ; B01J21/00

Abstract:
Disclosed herein is 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, which are suitable, 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. The first layer is in contact with the incoming exhaust gas, the second layer with the outgoing exhaust gas. Both layers contain alumina. The first layer contains palladium. The second layer contains, in addition to rhodium, an oxygen-storing cerium/zirconium mixed oxide.
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