Catalytic system comprising antimony-containing catalyst
AssigneeBASF SE
InventorsLiang Chen, Jiadi Zhang, Renjie Qiu, Yuchao Zhang, Yufen Hao, Wenming Shi
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Abstract
A catalyst system for purifying an exhaust gas, comprising one or more antimony-containing regions comprising an antimony-containing catalyst, particularly antimony-containing SCR catalyst, and one or more antimony-trapping regions comprising a molecular sieve which is optionally metal-promoted, wherein at least one of the antimony-trapping regions is located downstream of the one or more antimony-containing regions in a flow direction of the exhaust gas, and also a method for treatment of an exhaust gas containing nitrogen oxides.
Claims20
A catalyst system for purifying an exhaust gas, the catalyst system comprising
- one or more antimony-containing regions comprising an antimony-containing catalyst, and
- one or more antimony-trapping regions comprising a metal-promoted molecular sieve,
- wherein at least one of the one or more antimony-trapping regions is located downstream of the one or more antimony-containing regions in a flow direction of the exhaust gas;
- and
- wherein the one or more antimony-trapping regions are formed by coating a slurry that has particle size D90 of 5 μm and contains the metal-promoted molecular sieve onto a substrate.
Dependencies are inferred from the claim text.