Patent ID: 8202481
Filing Date: 2012-06-19
Classification: B01D,B01J

Abstract:
1. An exhaust gas treatment catalyst capable of catalytically removing nitrogen oxides from an exhaust gas by using ammonia as a reducing agent while decomposing and removing unreacted ammonia, the exhaust gas treatment catalyst comprising: a porous catalyst base material comprising titania and at least one compound selected from the group consisting of oxides of vanadium (V), oxides of tungsten (W) and oxides of molybdenum (Mo); and a coating layer formed at a surface of the porous catalyst base material, said coating layer comprising platinum supported on titania; wherein the exhaust gas catalyst is obtained by a first catalyst slurry mixture comprising the platinum supported on titania with a second catalyst slurry prepared from titania and at least one compound selected from oxides of vanadium (V), oxides of tungsten (W) and oxides of molybdenum (Mo) to form a slurry mixture; and applying the slurry mixture to the surface of the porous catalyst base material.