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    EXHAUST GAS PURIFICATION CATALYST
    2.
    发明公开
    EXHAUST GAS PURIFICATION CATALYST 审中-公开

    公开(公告)号：EP3505229A1

    公开(公告)日：2019-07-03

    申请号：EP18213094.8

    申请日：2018-12-17

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

    发明人： TANAKA, Atsushi ,  YOSHIDA, Takeru ,  MIYOSHI, Naoto ,  SATO, Akemi ,  NOMURA, Yasutaka ,  INODA, Satoru

    IPC分类号： B01D53/94 ,  B01D46/24

    摘要： The exemplary embodiments relate to an exhaust gas purification catalyst, in which exhaust gas purification performance is secured and an increase in pressure loss is suppressed, which is an exhaust gas purification catalyst, in which a porous filter wall of a substrate having a wall-flow structure is coated with a catalyst material containing an OSC material having oxygen storage capacity and a catalyst metal, wherein the density of percolation paths having percolation path diameters of 4 µm or more per unit area inside of the filter wall coated with the catalyst material is 100 paths/mm 2 to 1000 paths/mm 2 .

    EXHAUST GAS PURIFYING CATALYST
    4.
    发明公开
    EXHAUST GAS PURIFYING CATALYST 审中-公开
    排气净化催化剂

    公开(公告)号：EP3260189A1

    公开(公告)日：2017-12-27

    申请号：EP17184322.0

    申请日：2010-12-23

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Cataler Corporation

    发明人： AOKI, Yuki ,  YOSHIDA, Takeru ,  SAKAGAMI, Shingo ,  KAWAI, Masaaki ,  HATANAKA, Miho ,  TANABE, Toshitaka ,  TAKAHASHI, Naoki

    IPC分类号： B01D53/94 ,  B01J23/63 ,  B01J37/02 ,  B01J23/44 ,  B01J21/06 ,  B01J27/24

    摘要： An exhaust gas purifying catalyst includes a substrate (1) that defines an exhaust gas passage; a lower catalyst layer (2) formed over the substrate, and an upper catalyst layer (3) formed over the lower catalyst layer (2). The lower catalyst layer (2) has a lower catalytic precious metal that contains at least one of Pt and Pd, and a lower-layer carrier that supports the lower catalytic precious metal. The upper catalyst layer (3) has an upper catalytic precious metal that contains Rh, and an upper-layer carrier that supports the upper catalytic precious metal. The upper-layer carrier comprises an inorganic mixed oxide that contains Ce, Zr, Al, Nd, and at least one element selected from the group consisting of rare earth elements other than Ce. The inorganic mixed oxide has interior regions containing a mixed aggregate composed of first particles comprising Ce and Zr in a form of a composite oxide, and second particles comprising Al in a form of alumina, and has cover layers containing Nd that cover surfaces of the respective interior regions. The Nd is unevenly present in the cover layers or the Nd is concentrated in the cover layers.

    摘要翻译： 一种废气净化催化剂，包括限定废气通道的基板（1） 形成在基底上的下催化剂层（2），和形成在下催化剂层（2）上的上催化剂层（3）。 下催化剂层（2）具有包含Pt和Pd中的至少一种的较低催化贵金属和负载较低催化贵金属的下层载体。 上催化剂层（3）具有含Rh的上催化贵金属和负载上催化贵金属的上层载体。 上层载体包含含有Ce，Zr，Al，Nd和选自Ce以外的稀土元素中的至少一种元素的无机混合氧化物。 所述无机混合氧化物具有内部区域，所述内部区域包含由复合氧化物形式的包含Ce和Zr的第一颗粒和包含Al的氧化铝形式的第二颗粒构成的混合聚集体，并且具有包含Nd的覆盖层，所述覆盖层覆盖各自的表面 内部区域。 Nd不均匀地存在于覆盖层中或Nd集中在覆盖层中。

    EXHAUST GAS PURIFICATION CATALYST APPARATUS
    7.
    发明公开
    EXHAUST GAS PURIFICATION CATALYST APPARATUS 审中-公开

    公开(公告)号：EP3991844A1

    公开(公告)日：2022-05-04

    申请号：EP20831269.4

    申请日：2020-06-17

    申请人： CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： IWATA, Kana ,  ITOU, Minoru ,  YOSHIDA, Takeru ,  KAKINOHANA, Masaru ,  SUZUKI, Hiromasa ,  TANAKA, Atsushi

    IPC分类号： B01J35/04 ,  B01D53/94 ,  B01J23/63 ,  F01N3/022 ,  F01N3/10 ,  F01N3/28

    摘要： An exhaust gas purification catalyst apparatus 100 has a honeycomb base material and a catalyst noble metal supported by the honeycomb base material, wherein: the honeycomb base material contains ceria-zirconia composite oxide particles as one of the constituent materials, is of a wall flow type, and includes inlet-side cells 21 and outlet-side cells 22 demarcated by porous partition walls 10; the catalyst noble metal is supported in inlet-side support regions 30 and outlet-side support regions 40; each of the inlet-side support regions 30 is formed with a specific length 31 from the exhaust gas flow upstream end; the catalyst noble metal 70% support depth is not greater than 50% of the thickness of the porous partition walls 10; each of the outlet-side support regions 40 is formed with a specific length 41 from the exhaust gas flow downstream end; and the catalyst noble metal 70% support depth is greater than 50% of the thickness of the porous partition walls 10.