基本信息:
- 专利标题： KATALYTISCH AKTIVER PARTIKELFILTER MIT HOHER FILTRATIONSEFFIZIENZ
- 专利标题（英）：CATALYTICALLY ACTIVE PARTICULATE FILTER WITH A HIGH DEGREE OF FILTERING EFFICIENCY
- 申请号：PCT/EP2021/085657 申请日：2021-12-14
- 公开(公告)号：WO2022129027A1 公开(公告)日：2022-06-23
- 发明人： SCHOENHABER, Jan , BRAUN, Carolin , FRIEDRICH, Birgit , MUELLER, Ralf , ELLENBRAND, Sebastian , BRADE, Ronja , KLOSE, Norbert , BRAND, Christian , COLOMBO, Massimo , GOTTHARDT, Meike Antonia
- 申请人： UMICORE AG & CO. KG
- 申请人地址： Rodenbacher Chaussee 4
- 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： Rodenbacher Chaussee 4
- 优先权： EP20214160.2 2020-12-15
- 主分类号： B01D53/94
- IPC分类号： B01D53/94 ; B01J23/63 ; B01J35/00 ; B01J37/02 ; F01N3/035 ; B01J21/06 ; B01J35/04 ; F01N3/021 ; F01N3/28
The invention relates to a wall flow filter for removing particulate matter from the exhaust of internal combustion engines, comprising a wall flow filter substrate having a length L, and different coatings Z and F, the wall flow filter substrate being provided with channels E and A which run parallel between a first end and a second end of the wall flow filter substrate, are separated by porous walls, and form surfaces OE and OA, respectively; channels E are closed at the second end, and channels A are closed at the first end; coating Z is disposed in the porous walls and/or on surfaces OA, but not on surfaces OE, and contains palladium and/or rhodium and a cerium/zirconium mixed oxide; coating F is disposed mainly on surfaces OE, but not on surfaces OA, and comprises a membrane and no precious metal. The wall flow filter is characterized in that the mass ratio of coating Z to coating F ranges from 0.1 to 25.