Patent ID: 7662744
Filing Date: 2010-02-16
Classification: B01D,B01J,Y02T

Abstract:
1. A catalyst for use in a selective reduction of NO x in NO x -containing exhaust gases of internal combustion engines with introduction of a reducing agent into the exhaust gases, said catalyst comprising: a substrate body; a support layer located overlying said substrate body and having a surface area of at least 50 m 2 /; and, an active layer formed from at least one coating applied to said support layer, said at least one coating comprising (i) an active component which comprises an iron oxide and (ii) a promoter selected from the group consisting of tungsten, zirconium and molybdenum, said promoter serving as a stabilizer for said iron oxide, said support layer including iron impregnated into said support layer from said iron oxide, said impregnated iron representing a mass proportion of said support layer in the range of 0.1 percent to 5 percent.