Poisoning-resistant catalyst, process for production thereof, an

Details Poisoning-resistant catalyst, process for production thereof, an Poisoning-resistant catalyst, process for production thereof, an

1992-09-21

1994-07-19

Dees, Carl F.

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

Catalyst or precursor therefor

Silicon containing or process of making

502262, B01J 2112, B01J 2340

Patent

active

053309561

ABSTRACT:
The present invention provides a poisoning-resistant catalyst for combustion of CO and inflammable gases which comprises an inorganic carrier, a noble metal active ingredient supported on said inorganic carrier, and silica supported on said noble metal active ingredient, said noble metal active ingredient comprising at least one member selected from the group consisting of Pt, Rh and Pd, the surface of said catalyst being richer in silica and the inner part of said catalyst becoming richer in said noble metal active ingredient the deeper from the surface said inner part becomes; and a catalytic combustion apparatus for burning inflammable gases in a starting gas by the use of said catalyst. Said catalyst has a high resistance to poisoning and has a high level of activity at a low temperature of 200.degree. C. or lower.

REFERENCES:
patent: 5202299 (1993-04-01), Symons et al.

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