Doubly promoted platinum group metal catalysts for emission cont

Details Doubly promoted platinum group metal catalysts for emission cont Doubly promoted platinum group metal catalysts for emission cont

1986-01-06

1987-03-31

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 2310, B01J 2358

Patent

active

046543198

ABSTRACT:
Alumina supported platinum-group metal pelleted catalysts are made which exhibit excellent performance and which have unique Pt concentration profiles. The catalysts are doubly promoted with ceria and alkali metal oxides, especially ceria along with lithia, and can optionally have nickel (oxide) as a base metal catalytic ingredient. The unique Pt profile is obtained by adding at least part of the Rh component separately from any other Pt group metals.

REFERENCES:
patent: 4128503 (1978-12-01), Yamauchi et al.
patent: 4369132 (1983-01-01), Kinoshita et al.

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