Process and apparatus for reducing the nitrogen oxide content in exhaust gases by the controlled addition of NH3
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United States of America Patent
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Mar 30, 2004
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N/A
app pub date -
Sep 14, 2001
filing date -
Apr 28, 1998
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Abstract
In the reduction of quantities of No.sub.x in the exhaust gases of lean bum engines such as diesel engines, using a selective reduction catalyst and a source of ammonia, the present invention improves overall conversion by supplying ammonia or a precursor intermittently so that it is adsorbed and desorbed during the engine operating cycle.
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