SCR catalysts preparation methods
    2.
    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 。

    SCR CATALYSTS PREPARATION METHODS
    5.
    发明申请
    SCR CATALYSTS PREPARATION METHODS 有权
    SCR催化剂的制备方法

    公开(公告)号:US20130108544A1

    公开(公告)日:2013-05-02

    申请号:US13282594

    申请日:2011-10-27

    IPC分类号: C01B39/54

    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 。

    CARBON MONOXIDE-SELECTIVE OXIDATION CATALYSTS
    9.
    发明申请
    CARBON MONOXIDE-SELECTIVE OXIDATION CATALYSTS 有权
    碳氧化物选择性氧化催化剂

    公开(公告)号:US20130259779A1

    公开(公告)日:2013-10-03

    申请号:US13435265

    申请日:2012-03-30

    IPC分类号: B01D53/94 F01N3/28

    摘要: Particles of mixed oxides of cerium, zirconium, and copper (CeZrCuOx) may be prepared as catalysts and used to preferentially catalyze the oxidation of CO in exhaust streams containing CO and NH3. In one practice, this CeZrCuOx catalyst may be used in combination with a close-coupled PGM catalyst which promotes the formation of NH3 in the exhaust during fuel-rich operation, and at least one under-floor NH3-SCR catalyst, which catalyzes the reduction of NOx in the exhaust stream during fuel-lean operation using NH3 as a reductant. During fuel-rich engine operation, the exhaust stream may be doped with oxygen downstream of the PGM catalyst and passed in contact with particles of the CeZrCuOx catalyst so that residual CO in the exhaust may be oxidized to CO2, without oxidation or other conversion of the NH3.

    摘要翻译: 可以制备铈,锆和铜(CeZrCuOx)的混合氧化物的颗粒作为催化剂,并用于优先催化含有CO和NH 3的废气流中CO的氧化。 在一种实践中,该CeZrCuOx催化剂可以与紧密耦合的PGM催化剂组合使用,其在富燃操作期间促进废气中NH 3的形成,并且至少一个底层下的NH 3 -SCR催化剂催化还原 在使用NH 3作为还原剂的贫油运转期间排气流中的NOx。 在富燃料发动机运行期间,排气流可以在PGM催化剂的下游掺杂氧,并与CeZrCuOx催化剂的颗粒接触,使得废气中的残余CO可被氧化成二氧化碳,而不会氧化或其它转化 NH3。