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37 条记录 (耗时 0.035 秒)

    Low pressure drop coated diesel exhaust filter
    34.
    发明申请
    Low pressure drop coated diesel exhaust filter 审中-公开
    低压降涂层柴油机排气过滤器

    公开(公告)号：US20070140928A1

    公开(公告)日：2007-06-21

    申请号：US11638899

    申请日：2006-12-14

    申请人： Douglas Beall ,  Achim Heibel ,  Tinghong Tao

    发明人： Douglas Beall ,  Achim Heibel ,  Tinghong Tao

    IPC分类号： B01D50/00

    CPC分类号： B01D53/944 ,  B01J35/0006 ,  B01J35/04 ,  B01J37/0201 ,  B01J37/0215 ,  F01N3/0222 ,  F01N3/035 ,  F01N2330/06 ,  F01N2330/30 ,  F01N2510/0682 ,  Y02A50/2341

    摘要： A coated diesel exhaust filter is provided that applies a relatively low pressure drop across the exhaust system despite the buildup of soot deposits. The filter includes a porous ceramic structure having an inlet end, an outlet end, and a plurality of gas inlet and gas outlet channels disposed between the inlet and outlet ends, the channels being separated by porous ceramic walls. A catalyst is distributed at least partly within the porous ceramic walls of the structure, and is distributed at a higher concentration within portions of the ceramic walls adjacent to the outlet surfaces than within portions of the ceramic walls adjacent the inlet surfaces. Both the inlet and outlet surfaces are substantially free of the catalyst in order to maintain a gas-conducting porosity in these surfaces. The resulting filter effectively treats nitrogen oxides, carbon monoxide and unburned hydrocarbons present in the exhaust gas stream while advantageously imposing a relatively low pressure drop across the exhaust system even when soot deposits accumulate on the inlet surfaces of the ceramic walls.

    摘要翻译： 提供了一种涂覆的柴油机废气过滤器，尽管积聚了烟灰沉积物，但它们在排气系统上施加相对较低的压降。 过滤器包括多孔陶瓷结构，其具有入口端，出口端以及设置在入口端和出口端之间的多个气体入口和气体出口通道，通道被多孔陶瓷壁隔开。 催化剂至少部分地分布在结构的多孔陶瓷壁内，并且在与出口表面相邻的陶瓷壁的部分内分布在比邻近入口表面的陶瓷壁的部分内更高的浓度。 入口表面和出口表面基本上不含催化剂，以便在这些表面中保持导气孔隙率。 所得到的过滤器有效地处理废气流中存在的氮氧化物，一氧化碳和未燃烃，同时即使当烟尘沉积物积聚在陶瓷壁的入口表面上时，也有利地施加相对较低的压降。

    In situ theta alumina coated monolithic catalyst supports
    37.
    发明授权
    In situ theta alumina coated monolithic catalyst supports 失效
    原位θ氧化铝涂层整体催化剂载体

    公开(公告)号：US06903051B2

    公开(公告)日：2005-06-07

    申请号：US10121482

    申请日：2002-04-12

    申请人： Tinghong Tao ,  Jennifer M. Torns ,  Brian P. Usiak

    发明人： Tinghong Tao ,  Jennifer M. Torns ,  Brian P. Usiak

    IPC分类号： B01J32/00 ,  B01J21/04 ,  B01J35/04 ,  B01J37/02 ,  C10G45/34 ,  B01J20/00 ,  B01J23/00 ,  B01J23/02

    CPC分类号： B01J35/04 ,  B01J21/04

    摘要： The invention provides a monolithic catalyst support for hydrogenation and hydrotreating and in particular for selective hydrogenation of pyrolysis gasoline. The monolithic catalyst includes (i) a multicellular monolith body, preferably having a honeycomb structure, most preferably a honeycomb structure made of cordierite, the honeycomb structure having an inlet end, an outlet end, and a multiplicity of mutually adjoining cells extending along the length of the body from the inlet end to the outlet end, the cells being separated from one another by porous walls, and, (ii) a coating consisting of theta alumina synthesized in situ on the multicellular monolith body. The in situ theta alumina is strongly bonded with the multicellular monolith body and comprises at least 50% by weight of the washcoat layer, and preferably greater than 90% by weight.

    摘要翻译： 本发明提供了用于氢化和加氢处理的整体式催化剂载体，特别是用于热解汽油的选择性氢化。 整体式催化剂包括（i）多细胞整体体，优选具有蜂窝状结构，最优选由堇青石制成的蜂窝结构体，所述蜂窝结构具有入口端，出口端和沿着长度延伸的多个相互邻接的细胞 从入口端到出口端，细胞通过多孔壁彼此分离，并且（ii）由在多细胞整体体上原位合成的θ氧化铝组成的涂层。 原位θ氧化铝与多细胞整体体强结合，并且包含至少50重量％的修补基面涂层，优选大于90重量％。