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

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

1996-12-09

1998-09-01

Lewis, Michael L.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

423212, 4232391, B01D 5394

Patent

active

058007938

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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