Patent ID: 6165935
Filing Date: 2000-12-26
Classification: B01D,B01J,Y02T

Abstract:
A catalyst system for promoting the effectiveness of palladium in treating the exhaust gas of a natural gas-fueled engine, comprising:a first support consisting essentially of alumina;a second support comprising alumina with sufficient amounts of ceria and lanthana impregnated therein to promote conversion of methane in the exhaust gas when the engine is operating under stoichiometric or fuel-rich air/fuel conditions; andpalladium impregnated into the first and second supports;wherein the amount of palladium is between about 0.2 and about 20 g/L of catalyst, the amount of ceria in the second support is between about 6 and about 250 g/L of the alumina and the amount of lanthana in the second support is between about 2 and about 200 g/L of the alumina.