Patent ID: 9011783
Filing Date: 2015-04-21
Classification: B01D,B01J,F01N,Y02A

Abstract:
1. A catalyst for purifying an outflowing exhaust gas of a diesel engine, comprising a support body and two catalytically active coatings which have different compositions, with only a first coating of the two catalytically active coatings in direct contact with the outflowing exhaust gas, and with both coatings containing the platinum group metals platinum (Pt) and palladium (Pd) as catalytically active components, with the first coating containing more Pt than Pd, wherein the first coating contains a greater amount of total platinum group metal than a second coating of the two catalytically active coatings that is not in direct contact with the outflowing exhaust gas, and the second coating contains one or more zeolite compounds selected from beta-zeolites, X-zeolites, Y-zeolites, mordenites and ZSM-5 zeolites.