Lean-NO.sub.x catalysts containing silver supported on alumina

Details Lean-NO.sub.x catalysts containing silver supported on alumina Lean-NO.sub.x catalysts containing silver supported on alumina

1995-06-30

1998-01-20

Caldarola, Glenn

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

4232391, B01J 2350

Patent

active

057100888

ABSTRACT:
This invention is a catalyst comprising silver loaded on a particularly defined alumina for reducing nitrogen oxide from emissions generated by a lean-burn engine. The alumina has (i) a high surface area of at least 150 m.sup.2 /g, (ii) a small average pore diameter between 15 to 100 angstroms wherein at least 65% of the pore diameters are in the range of 15 and 100 angstroms, and (iii) pore diameters distributed in a narrow range such that at least 55% of the pore diameters are distributed in a 50 angstrom range.

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