catalyst for purification of exhaust gases from internal combustion engines, to produce the catalyst, the use of the catalyst containing the catalyst and exhaust system

摘要

The invention relates to a catalyst for cleaning the exhaust gases from internal combustion engines, especially diesel engines, comprising a monolithic body having longitudinally extending, open throughchannels coated with a surface-enlarging washcoat layer which contains one or more catalytically active precious metals. In order to reduce the tendency of the catalyst to oxidize and absorb (be enriched with) sulphur dioxide, the washcoat layer of the catalyst is based on silicon carbide and is substantially free from aluminum oxide. A method for preparing the catalyst, the use of the catalyst, as well as an exhaust gas cleaning system and a motor vehicle equipped with the catalyst, are also disclosed.