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    EXHAUST GAS TREATMENT SYSTEM
    2.
    发明申请
    EXHAUST GAS TREATMENT SYSTEM 审中-公开

    公开(公告)号：US20180156090A1

    公开(公告)日：2018-06-07

    申请号：US15735509

    申请日：2016-06-10

    Applicant: BASF Corporation

    Inventor： Wen-Mei Xue ,  John K. Hochmuth

    IPC: F01N3/10 ,  F01N3/20

    CPC classification number: F01N3/101 ,  B01J23/44 ,  F01N3/103 ,  F01N3/106 ,  F01N3/2066 ,  F01N3/2073 ,  F01N13/009 ,  F01N13/0097 ,  F01N2510/063 ,  Y02T10/22 ,  Y02T10/24

    Abstract: Described are exhaust gas treatment systems for treatment of a gasoline engine exhaust gas stream. The exhaust gas treatment systems comprise an ammonia generating and hydrocarbon oxidation catalyst, a TWC catalyst, and an ammonia selective catalytic reduction (SCR) catalyst downstream of the TWC catalyst. The ammonia generating and hydrocarbon oxidation catalyst comprises a refractory metal oxide support, a platinum component, and a palladium component. The ammonia generating and hydrocarbon oxidation catalyst is substantially free of ceria and substantially free of NOx storage components. The platinum and palladium components are present in a platinum to palladium ratio of greater than about 1 to 1.

    Molecular Sieve Catalyst Compositions, Catalytic Composites, Systems, And Methods
    9.
    发明申请
    Molecular Sieve Catalyst Compositions, Catalytic Composites, Systems, And Methods 审中-公开
    分子筛催化剂组合物，催化复合材料，系统和方法

    公开(公告)号：US20150367337A1

    公开(公告)日：2015-12-24

    申请号：US14741756

    申请日：2015-06-17

    Applicant: BASF Corporation

    Inventor： Xiaofan Yang ,  John K. Hochmuth ,  Wen-Mei Xue ,  Xiaoming Wang ,  Matthew Tyler Caudle ,  Ahmad Moini ,  Dustin O. Hollobaugh ,  Qi Fu ,  Michael Breen

    IPC: B01J29/76 ,  B01D53/94 ,  B01J35/04 ,  B01J29/72

    Abstract: Described is a selective catalytic reduction catalyst comprising a zeolitic framework material of silicon and aluminum atoms, wherein a fraction of the silicon atoms are isomorphously substituted with a tetravalent metal. The catalyst can include a promoter metal such that the catalyst effectively promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150 to 650° C. In another aspect, described is a selective catalytic reduction composite comprising an SCR catalyst material and an ammonia storage material comprising a transition metal having an oxidation state of IV. The SCR catalyst material promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150° C. to 600° C., and the SCR catalyst material is effective to store ammonia at temperatures of 400° C. and above. A method for selectively reducing nitrogen oxides, and a method for simultaneously selectively reducing nitrogen oxide and storing ammonia are also described. Additionally, an exhaust gas treatment system is also described.

    Abstract translation: 描述了包含硅和铝原子的沸石骨架材料的选择性催化还原催化剂，其中一部分硅原子被四价金属同晶取代。 催化剂可以包括促进剂金属，使得催化剂有效地促进氨与氮氧化物的反应，以在150至650℃的温度范围内选择性地形成氮和H 2。另一方面，描述了选择性催化还原复合材料，其包含 SCR催化剂材料和包含具有IV氧化态的过渡金属的氨储存材料。 SCR催化剂材料促进氨与氮氧化物的反应，在150℃至600℃的温度范围内选择性地形成氮和H2O，SCR催化剂材料在400℃的温度下有效储存氨。 以上。 还描述了选择性还原氮氧化物的方法，以及同时选择性地还原氮氧化物和储存氨的方法。 此外，还描述了废气处理系统。

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