Three way conversion catalyst including a ceria-containing...

Details Three way conversion catalyst including a ceria-containing... Three way conversion catalyst including a ceria-containing...

B - Operations, Transporting

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B01J 23/10 (2006.01) B01D 53/94 (2006.01) B01J 23/63 (2006.01) B01J 35/00 (2006.01)

Patent

CA 2027422

ABSTRACT A catalyst composition includes a zirconia support on which is dispersed a limited amount of ceria to provide a zirconia/dispersed ceria support, and a rhodium catalytic component. The ceria content of the zirconia support does not exceed about fifteen percent by weight based on the combined weight of ceria plus zirconia. The resultant cat- alyst composition enhances the efficiency of three-way con- version catalyst systems in which it is employed, possibly by promoting the water gas shirt reaction and the steam re- forming of hydrocarbon. The rhodium on zirconia/dispersed ceria support may be combined with a catalytically effective amount of a platinum catalytic component to provide an ef- fective three-way conversion catalyst.

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