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    Multilayered Catalyst Compositions
    1.
    发明申请
    Multilayered Catalyst Compositions 有权
    多层催化剂组合物

    公开(公告)号：US20100104491A1

    公开(公告)日：2010-04-29

    申请号：US12609622

    申请日：2009-10-30

    申请人： Michel Deeba ,  Stephan Siemund ,  Xinyi Wei ,  Stefan Kotrel ,  Knut Wassermann ,  Glenn Svoboda ,  Harold Rabinowitz

    发明人： Michel Deeba ,  Stephan Siemund ,  Xinyi Wei ,  Stefan Kotrel ,  Knut Wassermann ,  Glenn Svoboda ,  Harold Rabinowitz

    IPC分类号： B01D53/56 ,  B01D53/86

    CPC分类号： B01D53/945 ,  B01D53/9472 ,  B01D53/9477 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/9025 ,  B01D2255/908 ,  F01N3/2803 ,  F01N2370/02 ,  F01N2510/0682 ,  F01N2510/0684 ,  Y02T10/22

    摘要： A layered three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Engine exhaust treatment system and methods of using the same are also provided. The catalytic material can be provided in layers such that a larger amount of oxygen storage component is provided in a downstream zone as compared to an upstream zone. For example, the upstream zone can be configured to have one, two, or three layers, and the downstream zone can be independently configured to have one, two, or three layers. In one or more embodiments, the catalyst supported on a carrier has three layers, where at least two of the layers are zoned to have an oxygen storage component being present in an upstream zone in an amount that is less than the oxygen storage component present in the downstream zone.

    摘要翻译： 公开了具有同时催化烃和一氧化碳氧化和氮氧化物还原的能力的层状三向转化催化剂。 还提供了发动机废气处理系统及其使用方法。 催化材料可以分层提供，使得与上游区域相比，在下游区域中提供更大量的储氧组分。 例如，上游区域可以被配置为具有一个，两个或三个层，并且下游区域可以被独立地配置成具有一个，两个或三个层。 在一个或多个实施方案中，负载在载体上的催化剂具有三层，其中至少两层被划分为具有存储在上游区中的储氧组分，其量小于存在于 下游区。