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    Catalyst structure for exhaust gas treatment
    1.
    发明授权
    Catalyst structure for exhaust gas treatment 有权

    公开(公告)号：US10576458B2

    公开(公告)日：2020-03-03

    申请号：US14779704

    申请日：2014-03-13

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

    发明人： Yasunori Imada ,  Yunosuke Nakahara

    IPC分类号： B01J23/00 ,  B01J23/63 ,  B01J35/10 ,  F01N3/28 ,  B01J37/02 ,  B01J23/10 ,  B01D53/94 ,  B01J37/03

    摘要： Provided is a new catalyst structure for exhaust gas treatment including an upper catalyst layer and a lower catalyst layer, in which the catalyst structure can sufficiently exhibit functions as a three way catalyst while maintaining gas diffusibility. Proposed is a catalyst structure including a substrate, an upper catalyst layer, and a lower catalyst layer, the catalyst structure having a first peak or a second peak at a pore volume diameter of 10 nm to 50 nm and a pore volume diameter of 50 nm to 100 nm, respectively, in the logarithmic differential pore volume distribution analyzed by a mercury intrusion porosimeter.

    EXHAUST GAS PURIFYING CATALYST
    5.
    发明申请
    EXHAUST GAS PURIFYING CATALYST 有权
    排气净化催化剂

    公开(公告)号：US20150273462A1

    公开(公告)日：2015-10-01

    申请号：US14440474

    申请日：2014-09-10

    申请人： MITSUI MINING & SMELTING CO., LTD.

    发明人： Hironori Iwakura ,  Toshiharu Moriya ,  Yasunori Imada ,  Yunosuke Nakahara

    IPC分类号： B01J35/10

    CPC分类号： B01J35/10 ,  B01D53/94 ,  B01D53/945 ,  B01D2255/1023 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/9202 ,  B01D2255/9205 ,  B01J23/63 ,  B01J35/0006 ,  B01J35/023 ,  B01J35/1076 ,  Y02T10/22 ,  Y10T428/24372 ,  Y10T428/249981 ,  Y10T428/2982

    摘要： The present invention proposes a new exhaust gas purifying catalyst in which gas diffusibility and miscibility in a catalyst layer are high, and thereby excellent catalyst performance can be exhibited.There is proposed an exhaust gas purifying catalyst comprising a catalyst layer comprising two or more types of inorganic porous particles each having a different particle size, a catalytically active component, and voids, wherein; as a first characteristic, 50% or more by number of all the voids in the catalyst layer satisfies a condition of the following (formula 1); L/2/(πS)1/2≧2  (formula 1) wherein S represents a void cross-sectional area, and L represents a void cross-sectional circumference in the (formula 1), and; as a second characteristic, in the void cross-sectional area in the catalyst layer, the average void radius, determined assuming that the void shape is a perfect circle, is 10 μm to 20 μm.

    摘要翻译： 本发明提出了催化剂层中的气体扩散性和混合性高的新的排气净化催化剂，能够显示优异的催化剂性能。 提出了一种废气净化催化剂，其包含催化剂层，该催化剂层包含两种或更多种各自具有不同粒度的无机多孔颗粒，催化活性组分和空隙，其中： 作为第一特征，催化剂层中的所有空隙的数量的50％以上满足以下条件（式1）。 L / 2 /（＆pgr; S）1 /2≥2（式1）其中S表示空隙横截面积，L表示（式1）中的空隙截面圆周， 作为第二特征，在催化剂层的空隙截面积中，假设空隙形状为正圆所确定的平均空隙半径为10μm〜20μm。