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    EXHAUST GAS PURIFICATION CATALYST
    17.
    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
    19.
    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。

    COMPOSITE OXIDE MATERIAL AND EXHAUST GAS PURIFICATION CATALYST USING SAME
    20.
    发明公开
    COMPOSITE OXIDE MATERIAL AND EXHAUST GAS PURIFICATION CATALYST USING SAME 审中-公开
    垃圾填埋场垃圾填埋场垃圾填埋场

    公开(公告)号：EP2933231A1

    公开(公告)日：2015-10-21

    申请号：EP13862826.8

    申请日：2013-11-14

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： MIURA, Masahide ,  MORIKAWA, Akira ,  TANABE, Toshitaka

    IPC分类号： C01G25/00 ,  B01D53/86 ,  B01J20/06

    CPC分类号： B01J23/10 ,  B01D53/9445 ,  B01D2255/2065 ,  B01D2255/908 ,  B01J21/066 ,  B01J35/0006 ,  B01J35/002 ,  B01J35/02 ,  B01J35/023 ,  B01J37/0236 ,  B01J37/031 ,  B01J37/14 ,  B01J37/16 ,  C01G25/00 ,  C01P2002/36 ,  C01P2004/04 ,  Y02T10/22

    摘要： The object of the present invention is to provide an oxygen storage material used for an exhaust gas purifying catalyst that is superior in stability at high temperatures. The composite oxide material of the invention comprises crystalline particles of a ceria-zirconia composite oxide with a pyrochlore structure and crystals of a ceria-zirconia composite oxide with a fluorite structure on the particle surface, in which the crystals of the ceria-zirconia composite oxide with a fluorite structure contains zirconia in a larger amount than that of ceria, and such crystals are integrated with the crystalline particles of the ceria-zirconia composite oxide with a pyrochlore structure. The composite oxide material of the invention has high oxygen storage capacity that is less likely to decrease at high temperatures.

    摘要翻译： 本发明的目的是提供一种在高温下的稳定性优异的废气净化用催化剂用的储氧材料。 本发明的复合氧化物材料包括具有烧绿石结构的二氧化铈 - 氧化锆复合氧化物和颗粒表面上具有萤石结构的二氧化铈 - 氧化锆复合氧化物晶体的结晶颗粒，其中二氧化铈 - 氧化锆复合氧化物 萤石结构含有比二氧化铈更大量的氧化锆，并且这种晶体与具有烧绿石结构的二氧化铈 - 氧化锆复合氧化物的结晶颗粒结合。 本发明的复合氧化物材料具有高的储氧能力，在高温下不太可能降低。