Process and catalyst for reducing NO.sub.x in exhaust combustion gases
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United States of America Patent
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Jun 13, 2000
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app pub date -
Sep 22, 1998
filing date -
Nov 4, 1993
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Abstract
The present invention relates to a process for the catalytic reduction of nitrogen oxides contained in exhaust gases from combustion, which process comprises bringing said exhaust gases into contact with a Beta Zeolite exchanged with suitable amounts of cobalt salts, in the presence of a light hydrocarbon as the reducing agent. The present invention relates also to a catalyst for such a process, which catalyst comprises a Beta Zeolite exchanged with cobalt salts, characterized by a Co:zeolite Al molar ratio of <0.5.
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