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    A THREE-WAY CONVERSION CATALYST IN GASOLINE-NATURAL GAS APPLICATIONS
    2.
    发明申请
    A THREE-WAY CONVERSION CATALYST IN GASOLINE-NATURAL GAS APPLICATIONS 有权

    公开(公告)号：US20210339228A1

    公开(公告)日：2021-11-04

    申请号：US17250794

    申请日：2019-09-12

    Applicant: BASF Corporation

    Inventor： Karifala DUMBUYA ,  Thomas SCHMITZ ,  Florian WALTZ ,  Stephan SIEMUND

    IPC: B01J23/656 ,  F01N3/10 ,  B01J21/04 ,  B01J37/02 ,  F01N3/035

    Abstract: The disclosure relates to a three-way conversion catalyst for the treatment of an exhaust gas comprising nitrogen monoxide, carbon monoxide, and hydrocarbon, wherein the catalyst comprises: (i) a substrate; (ii) a first coating comprising rhodium supported on a first oxidic component; (iii) a second coating comprising palladium supported on a non-zeolitic oxidic material, wherein the non-zeolitic oxidic material comprises manganese and a second oxidic component, wherein the second coating consists of 0 weight-% to 0.001 weight-% of platinum; wherein the first coating is disposed on the substrate over x % of the axial length, with x ranging from 80 to 100; wherein the second coating extends over y % of the axial length from the inlet end to the outlet end and is disposed on the first coating, with y ranging from 20 to x.

    FOUR-WAY CONVERSION CATALYST HAVING IMPROVED FILTER PROPERTIES
    3.
    发明申请
    FOUR-WAY CONVERSION CATALYST HAVING IMPROVED FILTER PROPERTIES 审中-公开

    公开(公告)号：US20200368727A1

    公开(公告)日：2020-11-26

    申请号：US16966319

    申请日：2019-02-04

    Applicant: BASF Corporation ,  BASF SE

    Inventor： Thomas SCHMITZ ,  Attilio SIANI ,  Stephan SIEMUND ,  Janosch CRAVILLON

    IPC: B01J23/63 ,  B01J23/58 ,  B01J35/04 ,  B01J35/00 ,  B01J35/10 ,  B01J37/02 ,  B01J37/00 ,  B01D53/94 ,  F01N3/28 ,  F01N3/10

    Abstract: A four-way conversion catalyst for treating a gasoline engine exhaust gas has a porous wall flow filter substrate with an inlet end, outlet end, substrate axial length extending between the inlet and outlet end, and passages defined by porous internal walls of the substrate, the passages having inlet passages with an open inlet and closed outlet, and outlet passages having a closed inlet and open outlet. The internal wall pores have a three-way conversion catalytic in-wall coating with an oxygen storage compound and a platinum group metal supported on a refractory metal oxide. On at least a portion of the internal wall surface defining the interface between the internal walls and the passages, the catalyst has a porous on-wall coating from the internal wall surface to the passage. The coating has porous oxidic compound and platinum group metal content of 0 to 0.001 wt. %, of the total coating weight.

    FOUR-WAY CONVERSION CATALYST FOR THE TREATMENT OF AN EXHAUST GAS STREAM
    8.
    发明申请
    FOUR-WAY CONVERSION CATALYST FOR THE TREATMENT OF AN EXHAUST GAS STREAM 有权

    公开(公告)号：US20210293168A1

    公开(公告)日：2021-09-23

    申请号：US17250544

    申请日：2019-08-30

    Applicant: BASF Corporation

    Inventor： David SCHLERETH ,  Hao LI ,  Stephen SIEMUND ,  Thomas SCHMITZ ,  Attilio SIANI ,  Florian WALTZ

    IPC: F01N3/035 ,  F01N3/10 ,  F01N3/022 ,  B01J23/63

    Abstract: The present invention relates to a four-way conversion catalyst for the treatment of an exhaust gas stream of a gasoline engine, the catalyst comprising a porous wall-flow filter substrate comprising an inlet end, an outlet end, a substrate axial length extending between the inlet end and the outlet end, and a plurality of passages defined by porous internal walls of the porous wallflow filter substrate, wherein the plurality of passages comprise inlet passages having an open inlet end and a closed outlet end, and outlet passages having a closed inlet end and an open outlet end, wherein the interface between the passages and the porous internal walls is defined by the surface of the internal walls; wherein the porous internal walls comprise pores which comprise an oxidic component comprising a first refractory metal oxide, said first refractory metal oxide comprising aluminum, said oxidic component having a platinum group metal content in the range of from 0 to 0.001 weight-% based on the total weight of the oxidic component; wherein the catalyst further comprises a first three-way conversion catalytic coating, at least weight-% thereof being comprised in the pores of the internal walls, said first three-way conversion catalytic coating comprising an oxygen storage compound and a platinum group metal supported on a second refractory metal oxide.

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