Multi-stage selection catalytic reduction of NO{sub x} in lean burn engine exhaust
Description:
Recent studies suggest that the conversion of NO to NO{sub 2} is an important intermediate step in the selective catalytic reduction (SCR) of NO{sub x} to N{sub 2}. These studies have prompted the development of schemes that use an oxidation catalyst to convert NO to NO{sub 2}, followed by a reduction catalyst to convert NO{sub 2} to N{sub 2}. Multi-stage SCR offers high NO{sub x} reduction efficiency from catalysts that, separately, are not very active for reduction of NO, and alleviates the p…
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Date:
January 26, 1998
Creator:
Penetrante, B.M.; Hsiao, M.O.; Merritt, B.T. & Vogling, E.
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