Method for purifying exhaust gas
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United States of America Patent
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Jan 4, 2000
Issued Date -
N/A
app pub date -
Feb 29, 1996
filing date -
Sep 21, 1992
priority date (Note) -
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Abstract
A method for purifying an exhaust gas by simultaneously removing carbon monoxide, hydrocarbons, and nitrogen oxides contained in the exhaust gas, comprising bringing the oxygen rich exhaust gas into contact with an exhaust gas purifying catalyst comprised of at least one noble metal selected from the group consisting of platinum and palladium, at least one alkaline earth metal selected from the group consisting of barium, magnesium, calcium, and strontium, and at least one alkali metal selected from the group consisting of iron, nickel, and cobalt, supported on a carrier composed of a porous substance.
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