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    POWDER FOR CATALYSTS AND CATALYST FOR EXHAUST GAS PURIFICATION
    3.
    发明公开
    POWDER FOR CATALYSTS AND CATALYST FOR EXHAUST GAS PURIFICATION 审中-公开

    公开(公告)号：EP3378557A1

    公开(公告)日：2018-09-26

    申请号：EP16866309.4

    申请日：2016-11-15

    申请人： Mitsui Mining and Smelting Co., Ltd.

    发明人： NAGAO, Yuki ,  NAKAHARA, Yunosuke ,  MASAKI, Takanori

    IPC分类号： B01J23/10 ,  B01D53/94 ,  B01J23/63 ,  B01J32/00 ,  F01N3/10

    CPC分类号： B01D53/94 ,  B01J23/10 ,  B01J23/63 ,  B01J32/00 ,  F01N3/10

    摘要： A catalyst powder according to the present invention is a catalyst powder that includes: a core portion that contains ceria and zirconia; and a surface layer portion that is located on the core portion and contains ceria and zirconia. The ratio (M 2 /M 1 ) is 0.30 or more and 0.95 or less, the ratio (M 2 /M 1 ) being the ratio of a mole fraction M 2 (mol%) of cerium in the surface layer portion measured using X-ray photoelectron spectroscopy to a mole fraction M 1 (mol%) of cerium in the entire powder. It is preferable that the ratio (M 4/2 /M 3/1 ) between M 3/1 and M 4 / 2 is 1.1 or more and 5.0 or less, wherein M 3/1 (= M 3 /M 1 ) represents the ratio between a mole fraction M 3 (mol%) of zirconium in the entire powder and a mole fraction M 1 (mol%) of cerium in the entirety of the powder, and M 4 / 2 (= M 4 /M 2 ) represents the ratio between a mole fraction M 4 (mol%) of zirconium measured using X-ray photoelectron spectroscopy and a mole fraction M 2 (mol%) of cerium measured using X-ray photoelectron spectroscopy.

    PALLADIUM CATALYST
    5.
    发明公开
    PALLADIUM CATALYST 审中-公开
    钯催化剂

    公开(公告)号：EP2832444A1

    公开(公告)日：2015-02-04

    申请号：EP13768487.4

    申请日：2013-02-15

    申请人： Mitsui Mining and Smelting Co., Ltd.

    发明人： WAKABAYASHI, Takashi ,  SHIBATA, Yosuke ,  NAKAHARA, Yunosuke ,  YASUDA, Kiyotaka

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

    CPC分类号： B01J23/63 ,  B01D53/944 ,  B01D2255/1023 ,  B01D2255/2065 ,  B01D2255/908 ,  B01D2255/9202 ,  B01D2255/9207 ,  B01D2258/014 ,  B01J35/006 ,  B01J35/1014 ,  B01J35/1019 ,  F01N3/10

    摘要： Provided is a palladium catalyst in which palladium (Pd) is used as a catalyst active component, and particularly a novel palladium catalyst which can purify CO and THC with high efficiency even under a fuel-rich atmosphere having a high space velocity (SV). Proposed is a palladium catalyst having a substrate and a catalyst layer that contains palladium acting as a catalyst active component, an inorganic porous material acting as a catalyst support and ceria (CeO 2 ) particles acting as a promoter component, in which a mass ratio (Pd/CeO 2 ) of a content of the palladium in the catalyst layer to a content of the ceria particles in the catalyst layer is 0.0014 to 0.6000.

    摘要翻译： 本发明提供一种使用钯（Pd）作为催化剂活性成分的钯催化剂，特别是即使在空间速度（SV）高的富燃料气氛下也能够高效地净化CO和THC的新型钯催化剂。 提出了一种钯催化剂，其具有基材和含有作为催化剂活性成分的钯，作为催化剂载体的无机多孔材料和作为助催化剂成分的二氧化铈（CeO 2）粒子的催化剂层，其中，质量比（Pd / CeO 2）相对于催化剂层中的二氧化铈粒子的含量为0.0014〜0.6000。