Method for purifying an oxygen-rich exhaust gas
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United States of America Patent
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May 7, 1996
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N/A
app pub date -
Feb 2, 1994
filing date -
Jul 19, 1990
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Abstract
A catalyst, for purifying an exhaust gas, is a zeolite catalyst for removing nitrogen oxides, carbon monoxide and hydrocarbons from an oxygen-rich exhaust gas containing the nitrogen oxides, carbon monoxide and hydrocarbons, wherein the zeolite has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of 10 or more and contains nickel, or wherein the zeolite has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of 15 or more, and contains nickel and a rare earth metal or an alkaline earth metal.
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