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    SELECTIVE CATALYTIC REDUCTION ON N2O
    7.
    发明申请
    SELECTIVE CATALYTIC REDUCTION ON N2O 有权
    选择性催化还原N2O

    公开(公告)号：US20090011927A1

    公开(公告)日：2009-01-08

    申请号：US12208569

    申请日：2008-09-11

    申请人： James M. CHEN ,  Pascaline H. Tran ,  Michael Durilla ,  Stanley S. Mack

    发明人： James M. CHEN ,  Pascaline H. Tran ,  Michael Durilla ,  Stanley S. Mack

    IPC分类号： B01J29/072

    CPC分类号： B01D53/8625 ,  B01D2257/402 ,  Y02C20/10

    摘要： 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 NOx treatment may be effectuated in a single process stream.

    摘要翻译： 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NOx处理可以在单个工艺流中实现。

    Hydrothermally stable metal promoted zeolite beta for NOx reduction
    10.
    发明授权
    Hydrothermally stable metal promoted zeolite beta for NOx reduction 有权
    水热稳定的金属促进沸石β降低NOx

    公开(公告)号：US07182927B2

    公开(公告)日：2007-02-27

    申请号：US11039228

    申请日：2005-01-19

    申请人： Pascaline H. Tran ,  Xinsheng Liu ,  James M. Chen

    发明人： Pascaline H. Tran ,  Xinsheng Liu ,  James M. Chen

    IPC分类号： B01D53/54

    CPC分类号： B01J29/7615 ,  B01D53/8628 ,  B01J29/072 ,  B01J29/7057 ,  B01J35/002 ,  B01J2229/18 ,  B01J2229/24

    摘要： The present invention is directed to an iron-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the iron-promoted zeolite beta is treated so as to provide increased amounts of the iron promoter in the form of Fe(OH).The stabilized zeolite is formed by cation exchange of an iron salt into a zeolite beta which has a reduced sodium content such as by exchanging a sodium beta with ammonium or hydrogen cations. A zeolite beta having a reduced carbon content and a Si/Al ratio of no more than 10 also increases the Fe(OH) content of the iron-promoted catalyst. The iron-promoted catalyst which has the iron in the form of Fe(OH) is characterized by a peak at 3680±5 cm−1 in the IR spectra.

    摘要翻译： 本发明涉及可用于用氨选择性催化还原氮氧化物的铁促进的沸石β催化剂，其中处理铁促进沸石β以提供增加量的铁形式的铁促进剂（Fe 哦）。 稳定的沸石通过将铁盐阳离子交换成沸石β形成，沸石β具有降低的钠含量，例如通过用铵或氢阳离子交换钠β。 具有降低的碳含量和不超过10的Si / Al比的沸石β也增加了铁促进的催化剂的Fe（OH）含量。 具有Fe（OH）形式的铁的铁促进催化剂的特征在于IR光谱中在3680±5cm -1的峰。