Patent ID: 8932546
Filing Date: 2015-01-13
Classification: B01D,B01J,F01N,Y02A,Y10S

Abstract:
1. Catalytically active particulate filter comprising as a filter body, a wall flow filter substrate which comprises inflow and outflow channels separated by porous walls, wherein the outflow ends of the inflow channels and the inflow ends of the outflow channels are sealed gas-tight, and at least two catalytically active coatings, wherein the first catalytically active coating contains platinum and palladium and is situated in the porous walls between the inflow and outflow channels, and the second catalytically active coating contains platinum or palladium and platinum and is situated in the outflow channels on the porous walls between the inflow and outflow channels, wherein the platinum content of the second catalytically active coating is higher than the platinum content of the first catalytically active coating.