Catalyst of rhodium on zirconia

Details Catalyst of rhodium on zirconia Catalyst of rhodium on zirconia

1979-03-12

1980-11-11

Shine, W. J.

Compositions

X-ray or neutron shield

4232135, B01J 2106, B01J 2346

Patent

active

042331897

ABSTRACT:
A catalyst system and method of making the same is taught for treating exhaust gases from an internal combustion engine. A catalyst system includes a substrate and a washcoat on the substrate. The washcoat is formed of zirconia. A catalyst is placed on the washcoat consisting of rhodium metal or rhodium metal with another catalyst metal. By using zirconia as a washcoat, the rhodium is not dissolved into the washcoat during periods when the catalyst system is subjected to high temperature oxidizing conditions, as is the case when a gamma alumina washcoat is used.

REFERENCES:
patent: 3886260 (1972-05-01), Unland
patent: 4020013 (1977-04-01), Brennan
patent: 4076792 (1972-04-01), Foster et al.

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