Urea pyrolysis chamber and process for reducing lean-burn engine NOx emissions by selective catalytic reduction
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United States of America Patent
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Mar 20, 2001
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N/A
app pub date -
Aug 20, 1999
filing date -
May 12, 1997
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Abstract
Urea is pyrolyzed in a chamber designed to facilitate gasification of the urea by pyrolysis with conversion of urea to ammonia and isocyanic acid (HNCO) with water vapor and carbon dioxide. The product gases are introduced into exhaust gases from a lean-burn engine, preferably upstream of a turbocharger. The exhaust gases are then contacted with an SCR catalyst.
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