利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

24 条记录 (耗时 0.025 秒)

    Molecular Sieve Catalyst Compositions, Catalytic Composites, Systems, And Methods
    7.
    发明申请
    Molecular Sieve Catalyst Compositions, Catalytic Composites, Systems, And Methods 审中-公开
    分子筛催化剂组合物，催化复合材料，系统和方法

    公开(公告)号：US20150367337A1

    公开(公告)日：2015-12-24

    申请号：US14741756

    申请日：2015-06-17

    申请人： BASF Corporation

    发明人： Xiaofan Yang ,  John K. Hochmuth ,  Wen-Mei Xue ,  Xiaoming Wang ,  Matthew Tyler Caudle ,  Ahmad Moini ,  Dustin O. Hollobaugh ,  Qi Fu ,  Michael Breen

    IPC分类号： B01J29/76 ,  B01D53/94 ,  B01J35/04 ,  B01J29/72

    摘要： Described is a selective catalytic reduction catalyst comprising a zeolitic framework material of silicon and aluminum atoms, wherein a fraction of the silicon atoms are isomorphously substituted with a tetravalent metal. The catalyst can include a promoter metal such that the catalyst effectively promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150 to 650° C. In another aspect, described is a selective catalytic reduction composite comprising an SCR catalyst material and an ammonia storage material comprising a transition metal having an oxidation state of IV. The SCR catalyst material promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150° C. to 600° C., and the SCR catalyst material is effective to store ammonia at temperatures of 400° C. and above. A method for selectively reducing nitrogen oxides, and a method for simultaneously selectively reducing nitrogen oxide and storing ammonia are also described. Additionally, an exhaust gas treatment system is also described.

    摘要翻译： 描述了包含硅和铝原子的沸石骨架材料的选择性催化还原催化剂，其中一部分硅原子被四价金属同晶取代。 催化剂可以包括促进剂金属，使得催化剂有效地促进氨与氮氧化物的反应，以在150至650℃的温度范围内选择性地形成氮和H 2。另一方面，描述了选择性催化还原复合材料，其包含 SCR催化剂材料和包含具有IV氧化态的过渡金属的氨储存材料。 SCR催化剂材料促进氨与氮氧化物的反应，在150℃至600℃的温度范围内选择性地形成氮和H2O，SCR催化剂材料在400℃的温度下有效储存氨。 以上。 还描述了选择性还原氮氧化物的方法，以及同时选择性地还原氮氧化物和储存氨的方法。 此外，还描述了废气处理系统。

    Desulfation method for SCR catalyst
    10.
    发明授权
    Desulfation method for SCR catalyst 有权

    公开(公告)号：US11097264B2

    公开(公告)日：2021-08-24

    申请号：US16142451

    申请日：2018-09-26

    申请人： BASF Corporation

    发明人： Xiaofan Yang ,  Weiyong Tang ,  Ze Zhang

    IPC分类号： B01J38/08 ,  B01J29/90 ,  B01J29/76 ,  B01D53/94 ,  B01D53/96 ,  F01N3/20 ,  F01N3/28 ,  B01J38/02 ,  B01J29/072 ,  B01J29/72 ,  B01J29/70 ,  B01J29/06 ,  B01J37/02 ,  F01N3/035 ,  F01N3/10

    摘要： The present invention provides methods for low temperature desulfating sulfur-poisoned SCR catalysts, and emission control systems adapted to apply such desulfating methods, in order to regenerate catalytic NOx conversion activity. The methods are adapted for treating an SCR catalyst to desorb sulfur from the surface of the SCR catalyst and increase NOx conversion activity of the SCR catalyst, the treating step including treating the SCR catalyst with a gaseous stream comprising a reductant for a first treatment time period and at a first treatment temperature, wherein the first treatment temperature is about 350° C. or less, followed by a second treatment time period and a second treatment temperature higher than the first treatment temperature, wherein the molar ratio of reductant to NOx during the treating step is about 1.05:1 or higher.