Exhaust Gas Purification Catalyst
    91.
    发明申请

    公开(公告)号:US20220176354A1

    公开(公告)日:2022-06-09

    申请号:US17437972

    申请日:2020-03-10

    摘要: An exhaust gas purification catalyst provides excellent removal performance of methane, which is chemically stable. Exhaust gas purification catalyst includes a substrate that divides cells through which an exhaust gas flows and a catalyst layer that is provided on a surface of the substrate. The catalyst layer includes a palladium layer containing palladium that extends from a first end part which is an end part on the side into which an exhaust gas in the cells flows to a second end part which is an end part on the side from which an exhaust gas flows out, a platinum layer containing platinum that extends from the second end part to the first end part, and a rhodium layer containing rhodium that is laminated with both the palladium layer and the platinum layer.

    Three-way catalyst
    96.
    发明授权

    公开(公告)号:US11331651B2

    公开(公告)日:2022-05-17

    申请号:US16123211

    申请日:2018-09-06

    摘要: The present invention relates to a catalyst comprising a carrier substrate of the length L extending between substrate ends a and b and three washcoat zones A, B and C wherein washcoat zone A comprises one or more first platinum group metals and extends starting from substrate end a over a part of the length L,
    washcoat zone C comprises one or more first platinum group metals and extends starting from substrate end b over a part of the length L, and washcoat zone B comprises the same components as washcoat zone A and in addition, one or more second platinum group metals and extends between washcoat zones A and C, wherein L=LA+LB+LC, wherein LA is the length of washcoat zone A, LB is the length of substrate length B and LC is the length of substrate length C.