Patent ID: 7713909
Filing Date: 2010-05-11
Classification: B01D,B01J

Abstract:
1. An improved catalyzed diesel soot filter incorporating a porous filter element coated with a catalytic agent so that diesel soot from diesel exhaust gas is deposited into contact with the catalytic agent when diesel exhaust gas is passed through the porous filter element and so that the ignition temperature or oxidation temperature of the deposited diesel soot is reduced, wherein the improvement comprises: the catalytic agent consisting of an alkali metal, cerium, and oxygen, the mole ratio of alkali metal to cerium of the catalytic agent being from 0.5 to 5, wherein the alkali metal comprises potassium and the amount of potassium of the catalytic agent is in the range of from ten to about twenty five weight percent and the amount of cerium is in the range of from about thirty to about seventy weight percent.