Patent ID: 6500392
Filing Date: 2002-12-31
Classification: B01D,B01J,F01N,Y02A,Y02T

Abstract:
A catalyst for exhaust gas purification capable of purifying hydrocarbons, nitrogen oxides and carbon monoxide present in exhaust gas discharged from an internal combustion engine, which catalyst consists of:a monolithic carrier; and a catalyst layer consisting of Pd, Ba and a heat-resistant inorganic oxide selected from the group consisting of active alumina, zirconia, silica, titania, and zeolite, formed on the carrier, wherein an amount of Pd supported on the monolithic carrier is 100-300 g per ft3 of the monolithic carrier (3.53Ã—10âˆ’3 to 1.06Ã—10âˆ’2 g per cc of the monolithic carrier), an amount of Ba supported on the monolithic carrier is 0.010-0.060 g per cc of the monolithic carrier in terms of BaO, and a weight ratio of Pd of Ba as expressed as BaO is 1:2 to 1:10.