Exhaust gas oxidation catalyst
    124.
    发明授权
    Exhaust gas oxidation catalyst 有权
    废气氧化催化剂

    公开(公告)号:US08765067B1

    公开(公告)日:2014-07-01

    申请号:US14122051

    申请日:2012-05-25

    IPC分类号: B01D50/00 B01J29/06

    摘要: An exhaust gas oxidation catalyst characterized as an exhaust gas oxidation catalyst comprising a catalyst substrate, wherein a plurality of exhaust gas channels has been formed, and a catalyst layer formed on the surface of the exhaust gas channels in the catalyst substrate; wherein a catalyst layer consisting of a bottom catalyst layer, a top catalyst layer exposed within the exhaust gas channels, and an intermediate catalyst layer located between the bottom catalyst layer and top catalyst layer, is provided so as to cover not less than 25% of the exhaust gas channel surface, and wherein the bottom catalyst layer contains at least an oxygen-occluding agent as catalyst component but does not contain a hydrocarbon adsorbent, the intermediate catalyst layer contains at least catalyst metal, supported on a metal oxide support, and a hydrocarbon adsorbent as catalyst components, and the top catalyst layer contains at least an oxygen-occluding agent and a hydrocarbon adsorbent as catalyst components.

    摘要翻译: 一种废气氧化催化剂,其特征在于包括催化剂基板的废气氧化催化剂,其中形成有多个废气通道,以及形成在催化剂基板的排气通道的表面上的催化剂层; 其特征在于,设置由底部催化剂层,在排气通道内露出的顶部催化剂层和位于底部催化剂层与顶部催化剂层之间的中间催化剂层构成的催化剂层,以覆盖不低于 所述废气通道表面,并且其中所述底部催化剂层至少含有作为催化剂组分的吸氧剂,但不含烃吸附剂,所述中间催化剂层至少含有负载在金属氧化物载体上的催化剂金属,和 碳氢化合物吸附剂作为催化剂组分,顶部催化剂层至少含有吸氧剂和烃类吸附剂作为催化剂组分。