Refractory oxides based silver-tungsten lean-NOx catalyst

Details Refractory oxides based silver-tungsten lean-NOx catalyst Refractory oxides based silver-tungsten lean-NOx catalyst

1995-08-30

1997-01-14

Caldarola, Glenn A.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502305, 502415, B01J 2330, B01J 2350

Patent

active

055939333

ABSTRACT:
This invention is a catalyst for treating the exhaust gases produced during lean-burn engine operation, the gases comprising nitrogen oxides, carbon monoxide and hydrocarbons. The catalyst comprises a support material comprising gamma-alumina, a layer of about 0.01 to 1.5 wt. % tungsten deposited onto the support followed by a layer of about 1 to 3 wt. % silver, both being individually based on the weight of the support material.

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