System for reducing NO.sub.x from mobile source engine exhaust

Details System for reducing NO.sub.x from mobile source engine exhaust System for reducing NO.sub.x from mobile source engine exhaust

1995-11-02

1997-08-12

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422173, 422175, 422177, 422178, 422179, 422180, 422198, 422206, 422211, 422222, 422223, 60297, B01D 5000

Patent

active

056562446

ABSTRACT:
A process and system for reducing cold start NO.sub.x, carbon monoxide, and hydrocarbon emissions from mobile source engine exhaust utilizes adsorption and desorption of NO.sub.x compounds on a regenerable sorbent material. Molecules of NO.sub.x are adsorbed onto the sorbent material during the ineffective warm up period of a three-way catalytic converter. When the catalytic converter reaches operating temperatures, the NO.sub.x molecules are thermally desorbed from the sorbent material and delivered to the catalytic converter for effective reduction to molecular nitrogen.

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