Multilayered Catalyst Compositions
    4.
    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

    IPC分类号: B01D53/56 B01D53/86

    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。

    CERIA-ZIRCONIA-MIXED OXIDE PARTICLES AND PROCESS FOR THEIR PRODUCTION BY PYROLYSIS
    7.
    发明申请
    CERIA-ZIRCONIA-MIXED OXIDE PARTICLES AND PROCESS FOR THEIR PRODUCTION BY PYROLYSIS 审中-公开
    CERIA-ZIRCONIA-混合氧化物颗粒及其通过热解产生的方法

    公开(公告)号:US20140050654A1

    公开(公告)日:2014-02-20

    申请号:US13965615

    申请日:2013-08-13

    IPC分类号: B01J23/10 C01B13/00

    摘要: Described is a process for the production of mixed oxide particles. The process comprises providing a mixture comprising a solvent, one or more precursor compounds of ceria, one or more precursor compounds of zirconia, and one or more precursor compounds of one or more rare earth oxides other than ceria and/or one or more precursor compounds of yttria; forming an aerosol of the mixture; and pyrolyzing the aerosol of to obtain mixed oxide particles. The content of the rare earth oxides other than ceria and/or of yttria in the mixed oxide particles is comprised in the range of from 0.1 to 4.9 wt.-% based on the total weight of the rare earth oxides, yttria, and zirconia contained in the mixed oxide particles. Also describes are mixed oxide particles obtained from flame spray pyrolysis and to their use as an oxygen storage component, a catalyst, and/or as a catalyst support.

    摘要翻译: 描述了生产混合氧化物颗粒的方法。 该方法包括提供包含溶剂,二氧化铈的一种或多种前体化合物,一种或多种氧化锆的前体化合物和一种或多种除二氧化铈以外的一种或多种稀土氧化物和/或一种或多种前体化合物的前体化合物的混合物 的氧化钇 形成混合物的气溶胶; 并热解气溶胶以获得混合氧化物颗粒。 混合氧化物颗粒中除二氧化铈和/或氧化钇之外的稀土氧化物的含量相对于所含的稀土氧化物,氧化钇和氧化锆的总重量为0.1-4.9重量% 在混合氧化物颗粒中。 还描述了由火焰喷雾热解获得的混合氧化物颗粒和它们作为储氧组分,催化剂和/或作为催化剂载体的用途。