Three-way conversion catalyst including a ceria-containing zirco

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

1990-10-23

1992-08-18

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

4232135, B01J 2104, B01J 2106, B01J 2310, B01J 2342, B01J 2346

Patent

active

051399920

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 catalyst composition enhances the efficiency of three-way conversion catalyst systems in which it is employed, possibly by promoting the water gas shift reaction and the steam reforming 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 effective three-way conversion catalyst.

REFERENCES:
patent: 4587231 (1986-05-01), Sawamura et al.
patent: 4868148 (1989-09-01), Henk et al.

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