Catalyst-coated expanded metal foil substrate for an exhaust gas

Details Catalyst-coated expanded metal foil substrate for an exhaust gas Catalyst-coated expanded metal foil substrate for an exhaust gas

1976-08-09

1978-03-14

Richman, Barry S.

Chemistry: physical processes

Physical processes

Crystallization

23288FB, 60301, 252470, 252477R, B01J 300, F01N 315

Patent

active

040788989

ABSTRACT:
A system for reducing NO.sub.x gases found in the exhaust stream of the internal combustion engine is provided which includes an internal combustion engine having associated therewith a means for supplying fuel and oxygen to the engine, a manifold system for directing or channeling the exhaust gases from the engine, and a NO.sub.x reducing catalyst assembly communicating with the manifold which includes a housing having a NO.sub.x reducing catalytic structure of apertured thin metal foil positioned therein. In addition, an article composed of a catalytic material for reducing the oxides of nitrogen in exhaust gases from an internal combustion engine is also provided. The article includes a self-supporting catalytic structure in the form of an apertured, thin metal foil having a ratio of low mass to high surface area. In its preferred form, the foil is an expanded metal foil and is formed by tightly winding the foil into a plural layer helical coil.

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Chemical Abstracts; 13258g; vol. 59; 1963; "Elimination of Nitrogen Oxides from Exhaust Gases."

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