SCR catalysts preparation methods
    22.
    发明授权
    SCR catalysts preparation methods 有权
    SCR催化剂制备方法

    公开(公告)号:US08956992B2

    公开(公告)日:2015-02-17

    申请号:US13282594

    申请日:2011-10-27

    摘要: A method of replacing or exchanging non-metal charge balancing cations located at ion-exchanges sites within SAPO frameworks with cations of a transition metal using a solid state ion-exchange process. Transition metal-containing particles are formed on surfaces of SAPO particles, and thereafter the particles are heated in air to initiate the solid-state ion-exchange process. The transition metal-containing particles and the SAPO particles are heated to a temperature and for an amount of time to produce transition metal cations, and for the transition metal cations to replace at least a portion of the non-metal cations located within the SAPO frameworks.

    摘要翻译: 一种使用固态离子交换工艺替代或交换位于SAPO框架内的离子交换位置的非金属电荷平衡阳离子与过渡金属的阳离子的方法。 在SAPO颗粒的表面上形成过渡金属的颗粒,然后在空气中加热颗粒以引发固态离子交换过程。 将含过渡金属的颗粒和SAPO颗粒加热到一定温度和一段时间以产生过渡金属阳离子,并且对于过渡金属阳离子替代位于SAPO框架内的至少一部分非金属阳离子 。

    Mn, Ce and Zr mixed oxides oxidation catalyst
    24.
    发明授权
    Mn, Ce and Zr mixed oxides oxidation catalyst 有权
    Mn,Ce和Zr混合氧化物的氧化催化剂

    公开(公告)号:US08404201B2

    公开(公告)日:2013-03-26

    申请号:US13248315

    申请日:2011-09-29

    申请人: Gongshin Qi Wei Li

    发明人: Gongshin Qi Wei Li

    IPC分类号: B01D53/56 B01D53/94 C01B21/36

    摘要: The oxidation of nitrogen oxide (NO) in an oxygen-containing exhaust gas flow from a diesel or other lean-burn engine may be catalyzed using particles of co-precipitated and calcined manganese (Mn), cerium (Ce) and zirconium (Zr) mixed oxides. In preferred embodiments, the molar ratios of Mn, Ce and Zr to the total amount of base metals in the ternary mixed oxide catalyst are in the range of 0.25-0.35, 0.40-0.50 and 0.20-0.25, respectively. Further, this ternary mixed oxide catalyst is less susceptible to sulfur poisoning than previously-disclosed binary mixed oxide catalysts. The ternary mixed oxide catalyst may also be regenerated—and the inhibiting effect of SO2 reversed—by briefly exposing the catalyst to a reducing exhaust gas environment.

    摘要翻译: 可以使用共沉淀和煅烧锰(Mn),铈(Ce)和锆(Zr)的颗粒催化来自柴油或其它稀燃燃烧发动机的含氧废气流中氮氧化物(NO)的氧化, 混合氧化物。 在优选的实施方案中,三元混合氧化物催化剂中Mn,Ce和Zr与贱金属的总量的摩尔比分别在0.25-0.35,0.40-0.50和0.20-0.25的范围内。 此外,该三元混合氧化物催化剂比先前公开的二元混合氧化物催化剂不易受硫中毒的影响。 三元混合氧化物催化剂也可以再生,并且通过将催化剂简单地暴露于还原废气环境来反转SO2的抑制作用。

    Base metal oxides oxidation catalyst
    30.
    发明授权
    Base metal oxides oxidation catalyst 有权
    碱金属氧化物氧化催化剂

    公开(公告)号:US08057767B1

    公开(公告)日:2011-11-15

    申请号:US12853357

    申请日:2010-08-10

    申请人: Gongshin Qi Wei Li

    发明人: Gongshin Qi Wei Li

    IPC分类号: B01D53/56 B01D53/94

    摘要: Chemical species such as nitrogen oxide (NO), carbon monoxide, and low molecular weight hydrocarbons (e.g., C1-C5 and saturated or ethylenically unsaturated) in an oxygen-containing gas stream, such as the exhaust stream from a diesel engine, or other lean burn engine, may be oxidized using a mixture of MnOx with one or more other base metal oxides, with or without palladium. The oxidation is effective at temperatures above about 200° C. to convert about ninety percent or more of the carbon monoxide to carbon dioxide and to consume the hydrocarbons. The oxidation is also effective to convert much of the NO to NO2. In general, the mixed base metal oxides may be used as catalysts for the oxidation of nitrogen oxide in hot gas streams containing oxygen. They may optionally be used in a combination with palladium or platinum. But platinum, which is very expensive, does not have to be used in such oxidation reactions.

    摘要翻译: 含氧气体流中的诸如氮氧化物(NO),一氧化碳和低分子量烃(例如,C1-C5和饱和或烯属不饱和的)的化学物质,例如来自柴油发动机的排气流或其它 贫燃机可以使用MnO x与一种或多种其它碱金属氧化物的混合物进行氧化,有或没有钯。 氧化在高于约200℃的温度下是有效的,以将大约九十%或更多的一氧化碳转化成二氧化碳并消耗碳氢化合物。 氧化也可以将大部分的NO转化为NO2。 通常,混合的贱金属氧化物可以用作用于在含氧的热气流中氧化氮氧化物的催化剂。 它们可以任选地与钯或铂组合使用。 但是昂贵的铂不必在这种氧化反应中使用。