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    Layered catalyst composite
    2.
    发明授权
    Layered catalyst composite 失效
    层状催化剂复合材料

    公开(公告)号：US5597771A

    公开(公告)日：1997-01-28

    申请号：US265076

    申请日：1994-06-24

    申请人： Zhicheng Hu ,  Chung-Zong Wan ,  Yiu-Kwan Lui ,  Joseph C. Dettling

    发明人： Zhicheng Hu ,  Chung-Zong Wan ,  Yiu-Kwan Lui ,  Joseph C. Dettling

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  B01J23/89 ,  B01J35/00 ,  B01J37/02 ,  F01N3/10 ,  F01N3/28 ,  B01J21/04 ,  B01J23/02

    CPC分类号： B01D53/945 ,  B01J23/63 ,  B01J35/0006 ,  B01J37/0244 ,  B01D2255/902 ,  F01N2570/16 ,  Y02T10/22

    摘要： The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. The structure of the layered catalyst composite of the present invention is designed wherein there is a first layer and a second layer. The first layer comprises a first support; at least one first palladium component and an oxygen storage component in intimate contact with the palladium component; optionally another first platinum group metal component; a zirconium component; at least one first alkaline earth metal components and at least one first rare earth metal component selected from the group consisting of lanthanum metal components and neodymium metal components. The second layer comprises a second support; at least one second palladium component; optionally another second platinum group metal component; at least one second alkaline earth metal component; at least one second rare earth component selected from the group consisting of lanthanum metal components and neodymium metal components and a zirconium component.

    摘要翻译： 本发明涉及一种通常称为三元转化催化剂的层状催化剂复合物，其具有基本上同时催化烃和一氧化碳的氧化和还原氮氧化物的能力。 设计本发明的层状催化剂复合材料的结构，其中存在第一层和第二层。 第一层包括第一载体; 至少一种第一钯组分和与钯组分紧密接触的储氧组分; 另外的第一铂族金属组分; 锆组分; 至少一种第一碱土金属组分和至少一种选自镧金属组分和钕金属组分的第一稀土金属组分。 第二层包括第二支撑件; 至少一个第二钯组分; 另一种第二铂族金属组分; 至少一种第二碱土金属组分; 选自由镧金属成分和钕金属成分组成的组中的至少一种稀土类成分和锆成分。

    Palladium containing ceria-supported platinum catalyst and catalyst assembly including the same
    4.
    发明授权
    Palladium containing ceria-supported platinum catalyst and catalyst assembly including the same 失效
    含有二氧化铈载体的铂催化剂和包含其的催化剂组合物

    公开(公告)号：US5128306A

    公开(公告)日：1992-07-07

    申请号：US541452

    申请日：1990-06-21

    申请人： Joseph C. Dettling ,  Yiu-Kwan Lui

    发明人： Joseph C. Dettling ,  Yiu-Kwan Lui

    IPC分类号： F01N3/28 ,  B01D53/86 ,  B01D53/94 ,  B01J23/56 ,  B01J23/63

    CPC分类号： B01D53/945 ,  B01J23/63 ,  B01D2255/902 ,  Y02T10/22

    摘要： A catalyst composition includes a catalytic material containing a platinum catalytic component dispersed on a bulk ceria and a palladium catalytic component; the palladium catalytic component may be dispersed either on the ceria or on another support, such as an activated alumina support. The catalytic material, which may include a refractory binder, such as alumina, may be dispersed as a washcoat on a suitable carrier, e.g., a cordierite honeycomb-type carrier having a plurality of fine gas flow passages extending therethrough. The bulk ceria may be stabilized with a zirconia stabilizer and/or a lanthana stabilizer. The catalyst composition has utility as an oxidation catalyst and as a three-way conversion catalyst. In the latter case, its activity for the reduction of nitrogen oxides may optionally be supplemented either by adding a rhodium-containing catalytic overcoat or by providing a catalyst assembly in which the above-described catalyst composition is placed in series with any suitable nitrogen oxides reduction catalyst.

    摘要翻译： 催化剂组合物包括含有分散在本体二氧化铈上的铂催化组分和钯催化组分的催化材料; 钯催化组分可以分散在二氧化铈上或另一种载体上，例如活性氧化铝载体上。 可以包括耐火粘合剂如氧化铝的催化材料可以作为修补基面涂层分散在合适的载体上，例如具有延伸穿过其中的多个精细气体流动通道的堇青石蜂窝状载体。 本体二氧化铈可以用氧化锆稳定剂和/或氧化镧稳定剂稳定。 催化剂组合物可用作氧化催化剂和作为三元转化催化剂。 在后一种情况下，其还原氮氧化物的活性可以任选地通过加入含铑催化外涂层或提供催化剂组合物来补充，其中上述催化剂组合物与任何合适的氮氧化物还原 催化剂。