Mixed Metal 8-Ring Small Pore Molecular Sieve Catalyst Compositions, Catalytic Articles, Systems, and Methods
AssigneesBASF SE, N.E. Chemcat Corporation, Heesung Catalysts Corporation
InventorsJaya L. Mohanan, Patrick Burk, Michael Breen, Barbara Slawski, Makoto Nagata, Yasuyuki Banno, Eunseok Kim
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Abstract
Described are compositions and catalytic articles comprising both a copper-promoted 8-ring small pore molecular sieve and an iron-promoted 8-ring small pore molecular sieve. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
Claims17
A selective catalytic reduction article comprising both a first 8-ring small pore molecular sieve promoted with copper and a second 8-ring small pore molecular sieve promoted with iron, the catalyst effective to catalyze the reduction of nitrogen oxides in the presence of a reductant.
Dependencies are inferred from the claim text.