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公开(公告)号:US20020127163A1
公开(公告)日:2002-09-12
申请号:US09804328
申请日:2001-03-12
Applicant: ENGELHARD CORPORATION
Inventor: James M. Chen , Pascaline H. Tran , Michael Durilla , Stanley S. Mack
IPC: B01D053/56
CPC classification number: B01D53/8625 , B01D2257/402 , Y02C20/10
Abstract: A gas stream containing nitrous oxide and ammonia is contacted with a catalyst composition containing a zeolite. N2O is reduced to N2 and H2O at low temperatures in a highly efficient manner. Ammonia-mediated reduction of nitrous oxide can be effectuated from gas streams having N2O concentrations as low as 1%. The gas stream may also contact a catalytic composition selective for the reduction of NOx. In this way, N2O and Nx treatment may be effectuated in a single process stream.
Abstract translation: 含有一氧化二氮和氨的气流与含有沸石的催化剂组合物接触。 N2O在低温下以高效率的方式还原成N2和H2O。 氨介导的一氧化二氮的还原可以从具有低至1%的N 2 O浓度的气流中实现。 气流还可以选择性地接触用于还原NOx的催化剂组合物。 以这种方式,N2O和Nx处理可以在单个工艺流中实现。
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公开(公告)号:US20020018742A1
公开(公告)日:2002-02-14
申请号:US09766723
申请日:2001-01-22
Applicant: ENGELHARD CORPORATION
Inventor: Jeffrey B. Hoke , John R. Novak , John J. Steger , Terence C. Poles , L. Michael Quick , Ronald M. Heck , Zhicheng Hu , Michael Durilla
IPC: B01D053/62 , B01D053/66 , B01D053/72
CPC classification number: B01D53/02 , B01D53/0407 , B01D53/0438 , B01D53/74 , B01D53/8675 , B01D53/885 , B01D2253/102 , B01D2253/108 , B01D2253/1124 , B01D2253/25 , B01D2253/3425 , B01D2257/106 , B01D2257/302 , B01D2257/404 , B01D2257/502 , B01D2257/702 , B01D2257/91 , B01D2258/06 , B01D2259/4558 , B01D2259/65
Abstract: Method and apparatus for treating the atmosphere to lower the concentration of pollutants therein in which ambient air is passed into operative contact with a stationary substrate having at least one ambient air contacting surface having a pollutant treating material thereon.
Abstract translation: 用于处理大气以降低其中的污染物浓度的方法和装置,其中环境空气通过其与具有至少一个具有污染物处理材料的环境空气接触表面的固定基板工作接触。
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