Supported noble metal catalyst and process for preparing the same in situ
    122.
    发明授权
    Supported noble metal catalyst and process for preparing the same in situ 有权
    负载型贵金属催化剂及其原位制备方法

    公开(公告)号:US08652994B2

    公开(公告)日:2014-02-18

    申请号:US13700427

    申请日:2010-05-27

    摘要: A process for preparing supported noble metal catalyst in situ is provided by mixing and crystallizing hexamethylenetetramine, soluble divalent metal salts solution, Al2O3 carriers and soluble noble metal salts solution wherein the hexamethylenetetramine is used as a precipitating agent for preparing hydrotalcite and a reducing agent of noble metal precursor. During the growth process of hydrotalcite, Al3+ on the Al2O3 carrier's surface is directly used as the trivalent metal ions in the laminate structure and the hydrotalcite is obtained on the surface of the Al2O3 carriers by in-situ growth. A supported catalyst Me-LDHs-Al2O3 containing an elementary noble metal is produced wherein the noble metal element particle in the catalyst has a particle size of 10 to 60 nm, and is evenly and stably dispersed on or between slabs of the hydrotalcite.

    摘要翻译: 通过混合和结晶六亚甲基四胺,可溶性二价金属盐溶液,Al 2 O 3载体和可溶性贵金属盐溶液提供了原位制备负载型贵金属催化剂的方法,其中六亚甲基四胺用作制备水滑石的沉淀剂和贵金属的还原剂 金属前体。 在水滑石生长过程中,Al2O3载体表面的Al3 +直接用作叠层结构中的三价金属离子,并通过原位生长在Al2O3载体表面获得水滑石。 制备含有贵金属的载体催化剂Me-LDHs-Al 2 O 3,其中催化剂中的贵金属元素颗粒具有10至60nm的粒度,并均匀且稳定地分散在水滑石板之间或之间。

    Exhaust gas purifying catalyst
    128.
    发明授权
    Exhaust gas purifying catalyst 有权
    废气净化催化剂

    公开(公告)号:US07598205B2

    公开(公告)日:2009-10-06

    申请号:US11884682

    申请日:2006-01-27

    申请人: Hiromasa Suzuki

    发明人: Hiromasa Suzuki

    IPC分类号: B01J23/00 B01J23/38

    摘要: In a three-way catalyst for purifying exhaust gases from internal combustion engines, scattering of bismuth components can be suppressed by employing a Bi—Ti composite oxide at a predetermined ratio. Accordingly, the effect of suppressing hydrogen sulfide emissions can be retained for a long time. This catalyst comprises a support substrate, and a catalyst layer formed on the support substrate and including a noble metal, a porous oxide, and a Bi—Ti composite oxide, and satisfies 0.3≦R≦1.5, where R is the molar ratio of the Bi content to the Ti content per unit volume of the support substrate.

    摘要翻译: 在用于净化内燃机废气的三元催化剂中,通过以预定的比例使用Bi-Ti复合氧化物可以抑制铋成分的散射。 因此,能够长时间保持抑制硫化氢排放的效果。 该催化剂包括支撑基板和形成在支撑基板上并且包括贵金属,多孔氧化物和Bi-Ti复合氧化物的催化剂层,并且满足0.3≤R≤1.5,其中R是摩尔比 的Bi含量相对于支撑基板的每单位体积的Ti含量。