Method of purifying a lean exhaust gas and catalytic system ther

Details Method of purifying a lean exhaust gas and catalytic system ther Method of purifying a lean exhaust gas and catalytic system ther

1998-05-14

2000-07-18

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60301, 60284, 60302, 4232132, 4232135, F01N 300

Patent

active

060890150

ABSTRACT:
A method of purifying the lean exhaust gas of lean mix engines or diesel engines. The exhaust gas is first contacted with a permanent reduction catalyst and subsequently contacted with a nitrogen oxide storage catalyst. This procedure yields a uniformly good conversion of pollutants of the exhaust gases under differing operating conditions both as regards the air ratios and the exhaust gas temperatures.

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