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    IMPROVED CATALYTIC WALL-FLOW FILTER
    4.
    发明申请
    IMPROVED CATALYTIC WALL-FLOW FILTER 有权

    公开(公告)号：US20250154890A1

    公开(公告)日：2025-05-15

    申请号：US18506161

    申请日：2023-11-10

    Applicant: Johnson Matthey Public Limited Company

    Inventor： Francesco FOSCHI ,  James GOOGAN ,  Anton MACMINN ,  David MARVELL ,  Stuart David REID ,  Keimoy ST HILL ,  Mark WALTON ,  Thilanka WIJEMANNE

    IPC: F01N3/28 ,  B01D53/94 ,  F01N3/20

    Abstract: A catalytic wall-flow monolith filter for use in an emission treatment system is disclosed. The filter comprises porous walls, a first face and a second face defining a longitudinal direction therebetween and first and second pluralities of channels extending in the longitudinal direction. The first plurality of channels provides a first plurality of inner surfaces and is open at the first face and closed at the second face; and the second plurality of channels provides a second plurality of inner surfaces and is open at the second face and closed at the first face. The filter comprises a first selective catalytic reduction (SCR) catalyst coated on the first plurality of inner surfaces of the porous walls to form a first SCR catalyst porous layer, a second SCR catalyst within the porous walls, and a third SCR catalyst coated on the second plurality of inner surfaces of the porous walls to form a third SCR catalyst porous layer.

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