THERMALLY STABLE NH3-SCR CATALYST COMPOSITIONS
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United States of America Patent
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Issued Date -
Oct 12, 2017
app pub date -
Sep 21, 2015
filing date -
Sep 22, 2014
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Abstract
A catalyst composition comprising a mixture of
- (a) a zeolite compound in an amount of from 10% to 60% by weight, wherein the zeolite compound comprises cations selected from Fe2+, Fe3+, Cu+, Cu2+ or mixtures thereof, and(b) a ceria/zirconia/alumina composite oxide, wherein the alumina content in said composite oxide is in the range of 20 to 80% by weight, in particular of 40 to 60% by weight,a catalyst comprising such catalyst composition and its use for exhaust gas after-treatment of diesel and lean burn engines.
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