Methods of control of nitrogen oxide and hydrocarbon emissions from small engines
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United States of America Patent
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Jan 16, 2001
Grant Date -
N/A
app pub date -
Mar 28, 1997
filing date -
Apr 1, 1996
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Expired
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Abstract
A method of reducing the amounts of nitrogen oxides and hydrocarbons in the exhaust gas from a small, gasoline-fueled utility engine operating fuel-rich, while not reducing the amount of carbon monoxide in said exhaust gas, comprising treatment of said exhaust gas by a catalyst consisting essentially of rhodium supported on an alumina-based washcoat applied to a substrate.
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