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    MIXED METAL LARGE CRYSTAL MOLECULAR SIEVE CATALYST COMPOSITIONS, CATALYTIC ARTICLES, SYSTEMS AND METHODS
    6.
    发明专利
    MIXED METAL LARGE CRYSTAL MOLECULAR SIEVE CATALYST COMPOSITIONS, CATALYTIC ARTICLES, SYSTEMS AND METHODS 未知

    公开(公告)号：ZA201703525B

    公开(公告)日：2021-07-28

    申请号：ZA201703525

    申请日：2017-05-23

    Applicant: BASF CORP

    Inventor： MOHANAN JAYA L ,  YANG JEFF ,  BURK PATRICK ,  VOSS KENNETH E

    Abstract: Described are compositions and catalytic articles comprising both a first molecular sieve promoted with copper and a second molecular sieve promoted with iron, the first and second molecular sieves having a d6r unit and the first molecular sieves having cubic shaped crystals with an average crystal size of about 0.5 to about 2 microns. The weight ratio of the copper-promoted molecular sieve to the iron-promoted molecular sieve can be about 1:1 to about 4:1. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

    EXHAUST GAS TREATMENT SYSTEM
    8.
    发明专利
    EXHAUST GAS TREATMENT SYSTEM 未知

    公开(公告)号：ZA201706345B

    公开(公告)日：2022-08-31

    申请号：ZA201706345

    申请日：2017-09-20

    Applicant: BASF CORP

    Inventor： VOSS KENNETH E ,  MOHANAN JAYA L ,  HALLSTROM KEVIN A ,  SHAH SANDIP D ,  HOCHMUTH JOHN K

    Abstract: Described are exhaust gas treatment systems for treatment of an engine exhaust gas stream containing NOx. The exhaust gas treatment system comprises an engine, a catalyst system including a selective catalytic reduction article comprising two zones, an upstream zone comprising iron-promoted first molecular sieves and a downstream zone comprising copper-promoted second molecular sieves. The catalyst system is effective to reduce high NOx levels in the exhaust gas stream. Also described are methods for treatment of engine exhaust gas streams, comprising treating engine exhaust gas streams containing high NOx levels with catalyst systems including selective catalytic reduction articles having two zones.

    CATALYTIC WASHCOAT WITH CONTROLLED POROSITY FOR NOX ABATEMENT
    10.
    发明专利
    CATALYTIC WASHCOAT WITH CONTROLLED POROSITY FOR NOX ABATEMENT 未知

    公开(公告)号：CA3065741A1

    公开(公告)日：2018-12-13

    申请号：CA3065741

    申请日：2018-06-08

    Applicant: BASF CORP

    Inventor： PETROVIC IVAN ,  MOHANAN JAYA L ,  PETENKO JOSEPH J

    IPC: B01J29/72 ,  B01D53/94 ,  B01J35/10 ,  F01N3/20

    Abstract: The present disclosure recognizes a correlation between zeolitic surface area (ZSA) of a catalyst composition and its catalytic activity. Particularly, the disclosure provides catalyst articles for diesel NOx abatement, including a substrate and a washcoat layer containing metal-promoted molecular sieves, wherein the zeolitic surface area (ZSA) of the catalyst article is about 100 m2/g or greater, the volumetric surface area is about 900 m2/in3 or greater, and/or the total zeolitic surface area (tZSA) is about 1200 m2 or greater. The disclosure further relates to methods for evaluating ZSA, volumetric ZSA, and tZSA, e.g., including the steps of coating a catalyst composition comprising metal-promoted molecular sieves onto a substrate; calcining and aging the catalyst composition; determining the ZSA (or volumetric ZSA or tZSA) thereof; and correlating the ZSA (or volumetric ZSA or tZSA) with catalyst composition NOx abatement activity to determine whether the catalyst composition is suitable for an intended use.

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