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    EXHAUST GAS PURIFICATION CATALYST
    3.
    发明公开
    EXHAUST GAS PURIFICATION CATALYST 审中-公开

    公开(公告)号：EP3736036A1

    公开(公告)日：2020-11-11

    申请号：EP20172041.4

    申请日：2020-04-29

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

    发明人： CHINZEI, Isao ,  MIURA, Masahide ,  NAKAHIGASHI, Seiji ,  SUZUKI, Hiromasa ,  YAMAMOTO, Toshio ,  MORIKAWA, Akira ,  KATOH, Satoru ,  ONOZUKA, Takashi ,  ORI, Hirotaka ,  OKADA, Mitsuyoshi ,  HOSHINO, Sho

    IPC分类号： B01D53/94 ,  B01J23/63 ,  B01J35/00 ,  B01J35/04 ,  B01J35/10 ,  F01N3/10

    摘要： The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the atmosphere where the A/F is rich. The present disclosure relates to an exhaust gas purification catalyst including a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal and a metal oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 50 µm to 100 µm; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.5% by volume to 50% by volume of a whole volume of voids, the high-aspect-ratio pore having an equivalent circle diameter in a range from 2 µm to 50 µm in a cross-sectional image of a catalyst coating layer cross section perpendicular to an exhaust gas flow direction of the substrate and having an average aspect ratio in a range from 10 to 50, and wherein when a surface side in contact with an exhaust gas in a thickness direction of the catalyst coating layer is defined as 0% and a side in contact with the substrate is defined as 100%, 80 % by mass or more of a total amount of the noble metal is present in a range from 0% to 25% or more and 70% or less.

    EXHAUST GAS PURIFICATION CATALYST
    6.
    发明公开
    EXHAUST GAS PURIFICATION CATALYST 审中-公开

    公开(公告)号：EP3736035A1

    公开(公告)日：2020-11-11

    申请号：EP20170599.3

    申请日：2020-04-21

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

    发明人： CHINZEI, Isao ,  MIURA, Masahide ,  NAKAHIGASHI, Seiji ,  SUZUKI, Hiromasa ,  MORIKAWA, Akira ,  YAMAMOTO, Toshio ,  KATOH, Satoru ,  ONOZUKA, Takashi ,  ORI, Hirotaka ,  OKADA, Mitsuyoshi ,  HOSHINO, Sho

    IPC分类号： B01D53/94 ,  B01J35/10 ,  B01J37/00

    摘要： The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the transient state in which an A/F repeats rich and lean phases. The present disclosure relates to an exhaust gas purification catalyst comprising a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal, a composite oxide containing cerium oxide and zirconium oxide, and a composite oxide containing aluminum oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 20 µm to 100 µm; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.5% by volume to 50% by volume of a whole volume of voids, the high-aspect-ratio pore having an equivalent circle diameter in a range from 2 µm to 50 µm in a cross-sectional image of a catalyst coating layer cross section perpendicular to an exhaust gas flow direction of the substrate and having an average aspect ratio in a range from 10 to 50, and wherein the noble metal is supported on peripheries of the voids, the composite oxide containing the cerium oxide and the zirconium oxide, and the composite oxide containing the aluminum oxide.

    CATALYST FOR PURIFYING EXHAUST GAS
    7.
    发明公开
    CATALYST FOR PURIFYING EXHAUST GAS 审中-公开
    用于净化排气的催化剂

    公开(公告)号：EP3290112A1

    公开(公告)日：2018-03-07

    申请号：EP17184910.2

    申请日：2017-08-04

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Cataler Corporation

    发明人： SAITO, Yoshinori ,  MIURA, Masahide ,  NAKAHIGASHI, Seiji ,  SUZUKI, Hiromasa ,  SUZUKI, Takahiro ,  IIZUKA, Kosuke ,  ITO, Minoru ,  NAKASHIMA, Ryota

    IPC分类号： B01J23/10 ,  B01J23/63 ,  B01D53/94 ,  B01J35/00 ,  B01J35/02 ,  C01G25/00

    摘要： An catalyst for purifying exhaust gas comprising an OCS material that has sufficient heat resistance and achieves a favorable balance between the oxygen storage volume and the oxygen absorption/release rate includes an catalyst for purifying exhaust, which has a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises a ceria-zirconia-based composite oxide having a pyrochlore structure in an amount of 5 to 100 g/L based on the volume of the substrate, the ceria-zirconia-based composite oxide has a secondary particle size (D50) of 3 µm to 7 µm, and the ceria-zirconia-based composite oxide optionally contains praseodymium.

    摘要翻译： 用于净化废气的催化剂包括具有足够耐热性并实现储氧体积和氧吸收/释放速率之间的良好平衡的OCS材料，包括用于净化废气的催化剂，其具有基底和形成在其上的催化剂涂层 所述催化剂涂层包含基于所述基体的体积为5至100g / L的具有烧绿石结构的氧化铈 - 氧化锆基复合氧化物，所述氧化铈 - 氧化锆基复合氧化物具有次级 粒径（D50）为3μm〜7μm，氧化铈 - 氧化锆系复合氧化物根据需要含有镨。

    EXHAUST GAS CLEANING CATALYST, EXHAUST GAS CLEANING METHOD, AND EXHAUST GAS CLEANING SYSTEM
    8.
    发明公开
    EXHAUST GAS CLEANING CATALYST, EXHAUST GAS CLEANING METHOD, AND EXHAUST GAS CLEANING SYSTEM 审中-公开

    公开(公告)号：EP3725407A1

    公开(公告)日：2020-10-21

    申请号：EP20178997.1

    申请日：2017-04-13

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

    发明人： SHIRAKAWA, Shogo ,  MIURA, Masahide ,  IKAI, Toshihiro ,  IIZUKA, Kosuke ,  NIHASHI, Hiroki ,  NAITO, Isao ,  NAGATA, Takahiro

    IPC分类号： B01J23/63 ,  B01D53/94 ,  F01N3/10 ,  B01J35/00

    摘要： Provided is an exhaust gas cleaning catalyst capable of inhibiting the grain growth of particulates. An exhaust gas cleaning catalyst of the present invention includes composite metal particulates containing Pd and Rh, where the average proportion of the total number of Rh atoms relative to the total number of Pd and Rh atoms is 0.5 atom%, and given an X-ray wavelength of 1.5403 Å, when XRD analysis is carried out under the condition that the diffraction surface is the crystal lattice face of the Pd(111), and diffraction angles 2θ indicating the positions of the diffraction peaks on the diffraction surface are identified, the absolute value of the difference between the theoretical lattice constant B calculated from a formula related to Vegard's law using the identified values, and the actual lattice constant C calculated from a formula related to lattice constants and Bragg's law does not exceed 1.020×10 -3 (Å). A smaller absolute value of the difference between the theoretical lattice constant B and the actual lattice constant C is associated with a higher degree to which the Pd and Rh are combined with one another.

    EXHAUST GAS CLEANING CATALYST, EXHAUST GAS CLEANING METHOD, AND EXHAUST GAS CLEANING SYSTEM
    10.
    发明公开
    EXHAUST GAS CLEANING CATALYST, EXHAUST GAS CLEANING METHOD, AND EXHAUST GAS CLEANING SYSTEM 审中-公开

    公开(公告)号：EP3444030A1

    公开(公告)日：2019-02-20

    申请号：EP17782492.7

    申请日：2017-04-13

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Cataler Corporation

    发明人： SHIRAKAWA, Shogo ,  MIURA, Masahide ,  IKAI, Toshihiro ,  IIZUKA, Kosuke ,  NIHASHI, Hiroki ,  NAITO, Isao ,  NAGATA, Takahiro

    IPC分类号： B01J23/63 ,  B01D53/94 ,  F01N3/10

    摘要： Provided is an exhaust gas cleaning catalyst capable of inhibiting the grain growth of particulates. An exhaust gas cleaning catalyst of the present invention includes composite metal particulates containing Pd and Rh, where the average proportion of the total number of Rh atoms relative to the total number of Pd and Rh atoms is 0.5 atom%, and given an X-ray wavelength of 1.5403 Å, when XRD analysis is carried out under the condition that the diffraction surface is the crystal lattice face of the Pd(111), and diffraction angles 2θ indicating the positions of the diffraction peaks on the diffraction surface are identified, the absolute value of the difference between the theoretical lattice constant B calculated from a formula related to Vegard's law using the identified values, and the actual lattice constant C calculated from a formula related to lattice constants and Bragg's law does not exceed 1.020×10 -3 (Å). A smaller absolute value of the difference between the theoretical lattice constant B and the actual lattice constant C is associated with a higher degree to which the Pd and Rh are combined with one another.