EXHAUST GAS TREATMENT SYSTEM
    2.
    发明专利

    公开(公告)号:ZA201707086B

    公开(公告)日:2021-04-28

    申请号:ZA201707086

    申请日:2017-10-19

    Applicant: BASF CORP

    Abstract: Described are exhaust gas treatment systems for treatment of a gasoline engine exhaust gas stream containing NOx, particulate matter, and sulfur. The exhaust gas treatment system comprises: one or more catalytic articles selected from a three-way conversion catalyst (TWC), a lean NOx trap (LNT), and an integrated LNT-TWC; a platinum-containing catalytic article downstream from the one or more catalytic articles; and one or more selective catalytic reduction (SCR) catalytic articles immediately downstream from the platinum-containing catalytic article, the one or more SCR catalytic articles including a molecular sieve. The system stabilizes the SCR catalytic article from poisoning by sulfur.

    EXHAUST GAS TREATMENT CATALYST
    3.
    发明专利

    公开(公告)号:CA3005574A1

    公开(公告)日:2017-05-26

    申请号:CA3005574

    申请日:2016-11-16

    Applicant: BASF CORP

    Abstract: Described is a catalyst composition suitable for use as a selective catalytic reduction catalyst, comprising small-pore molecular sieve particles having a pore structure and a maximum ring size of eight tetrahedral atoms and impregnated with a promoter metal, and metal oxide particles dispersed within the small-pore molecular sieve particles and external to the pore structure of the small-pore molecular sieve particles, wherein the metal oxide particles comprise one or more oxides of a transition metal or lanthanide of Group 3 or Group 4 of the Periodic Table. A method for preparing the catalyst, a method for selectively reducing nitrogen oxides, and an exhaust gas treatment system are also described.

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