HC-SCR catalyst
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United States of America Patent
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Mar 5, 2013
Grant Date -
Aug 19, 2010
app pub date -
Nov 9, 2006
filing date -
Nov 14, 2005
priority date (Note) -
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Abstract
The present invention relates to a method of reducing coking over a Ag/Al2O3 hydrocarbon selective catalytic reduction catalyst in an exhaust stream of a lean burn internal combustion engine, the exhaust stream including hydrocarbon and NOx. The method includes controlling the hydrocarbon to molar NOx ratio of the exhaust stream so as to be within certain limits at certain temperatures. An exhaust system for a lean burn engine suited to the above method, and a lean burn internal combustion engine, or a vehicle or stationary power source including such an exhaust system are also included.
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