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    Exhaust gas purification catalyst
    2.
    发明申请
    Exhaust gas purification catalyst 审中-公开
    废气净化催化剂

    公开(公告)号：US20060223698A1

    公开(公告)日：2006-10-05

    申请号：US11369247

    申请日：2006-03-07

    申请人： Hisaya Kawabata ,  Masahiko Shigetsu

    发明人： Hisaya Kawabata ,  Masahiko Shigetsu

    IPC分类号： B01J23/10

    CPC分类号： B01D53/945 ,  B01J23/005 ,  B01J23/10 ,  B01J23/63 ,  Y02T10/22

    摘要： Catalytic converter for exhaust gas purification comprises a carrier, an oxide layer positioned above the carrier and comprising a compound oxide of cerium (Ce) and magnesium (Mg) with its molar ratio of Mg/(Ce+Mg), and a catalytic metal loaded on the oxide layer. By comprising the compound oxide of cerium and magnesium in the oxide layer, higher purification performance or lower light-off temperature can be obtained under the lean exhaust gas condition during the engine startup.

    摘要翻译： 用于排气净化的催化转化器包括载体，位于载体上方的氧化物层，其包含铈（Ce）和镁（Mg）的复合氧化物，其摩尔比为Mg /（Ce + Mg），并且催化金属负载 在氧化层上。 通过在氧化物层中包含铈和镁的复合氧化物，在发动机起动期间在稀薄排气条件下可以获得更高的净化性能或更低的起燃温度。

    Exhaust gas purification catalyst
    5.
    发明授权
    Exhaust gas purification catalyst 有权
    废气净化催化剂

    公开(公告)号：US09415383B2

    公开(公告)日：2016-08-16

    申请号：US13115876

    申请日：2011-05-25

    申请人： Masaaki Akamine ,  Masahiko Shigetsu

    发明人： Masaaki Akamine ,  Masahiko Shigetsu

    IPC分类号： B01J23/10 ,  B01J35/00 ,  B01D53/94 ,  B01J23/46 ,  B01J23/63 ,  B01J35/02 ,  B01J37/03 ,  B01J21/06 ,  B01J21/04

    CPC分类号： B01J35/0006 ,  B01D53/945 ,  B01D2255/1025 ,  B01D2255/2063 ,  B01D2255/2068 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/407 ,  B01D2255/908 ,  B01D2255/9202 ,  B01D2258/012 ,  B01J21/04 ,  B01J21/066 ,  B01J23/464 ,  B01J23/63 ,  B01J35/023 ,  B01J37/038 ,  Y02T10/22

    摘要： An exhaust gas purification catalyst includes a catalytic layer on a carrier, in which a particle component A and a particle component B are mixed. The particle component A is composed of catalytic-metal-doped CeZr-based mixed oxide powder, and has a particle size distribution with a peak in a particle size range of equal to or greater than 100 nm and equal to or less than 300 nm. A CeO2/(CeO2+ZrO2) mass ratio of CeZr-based mixed oxide is equal to or greater than 30% and equal to or less than 75%. The particle component B is composed of at least one selected from a group consisting of activated alumina powder, Zr-based-oxide-supported alumina powder, and catalytic-metal-undoped CeZr-based mixed oxide powder. At least a part of particles of the particle component B has a particle size larger than that of the particle component A.

    摘要翻译： 废气净化催化剂包括载体上的催化剂层，其中颗粒组分A和颗粒组分B被混合。 颗粒组分A由催化金属掺杂的CeZr基混合氧化物粉末组成，并且具有在等于或大于100nm且等于或小于300nm的粒度范围内的峰值的粒度分布。 CeZr基混合氧化物的CeO 2 /（CeO 2 + ZrO 2）质量比等于或大于30％且等于或小于75％。 颗粒组分B由选自活性氧化铝粉末，Zr-氧化物负载的氧化铝粉末和催化金属未掺杂的CeZr基混合氧化物粉末中的至少一种组成。 颗粒组分B的颗粒的至少一部分具有比颗粒组分A的颗粒大的粒径。