Patent ID: 7041263
Filing Date: 2006-05-09
Classification: B01D,B01J,C01G,Y02T

Abstract:
1. A method for treating a gas stream comprising hydrocarbons, carbon monoxide and nitrogen oxides which comprises (a) flowing the gas stream to a catalyst member comprising a catalyst composition comprising a mixture of (i) a composite of a cerium component, a zirconium component and a samarium component, (ii) a catalytically effective amount of a precious metal component and (iii) a refractory metal oxide support, wherein the catalyst composition is disposed on a carrier and the composite is present in an amount of about 0.01 to about 3 g/in 3 of the carrier and (b) catalytically oxidizing the hydrocarbons and carbon monoxide and catalytically reducing the nitrogen oxides in the gas in the presence of the catalyst member.