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    Selective catalytic reduction of N2O
    1.
    发明授权
    Selective catalytic reduction of N2O 有权
    N2O的选择性催化还原

    公开(公告)号：US07438878B2

    公开(公告)日：2008-10-21

    申请号：US09804328

    申请日：2001-03-12

    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： B01D53/56

    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 Nx 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。 N 2 O 2在低温下以高效的方式被还原成N 2 H 2和H 2 O 2。 氨介导的一氧化二氮的还原可以从低至1％的N 2 O 2浓度的气流中实现。 气流还可以选择性地接触催化剂组合物以还原NO x。 以这种方式，可以在单一工艺流中实施N 2 O 2和N 2 O 3处理。

    Hydrothermally stable metal promoted zeolite beta for NOx reduction
    3.
    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：US06914026B2

    公开(公告)日：2005-07-05

    申请号：US09948236

    申请日：2001-09-07

    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： B01D53/94 ,  B01D53/56 ,  B01D53/86 ,  B01J23/52 ,  B01J29/072 ,  B01J29/70 ,  B01J29/76 ,  B01J35/00 ,  B01J29/06

    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。

    Hydrothermally stable metal promoted zeolite beta for NOx reduction
    4.
    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：US07118722B2

    公开(公告)日：2006-10-10

    申请号：US10328370

    申请日：2002-12-26

    申请人： Pascaline H. Tran ,  Xinsheng Liu ,  James M. Chen ,  Gerard D. Lapadula ,  Howard Furbeck

    发明人： Pascaline H. Tran ,  Xinsheng Liu ,  James M. Chen ,  Gerard D. Lapadula ,  Howard Furbeck

    IPC分类号： B01J29/06

    CPC分类号： B01D53/9418 ,  B01D53/8628 ,  B01D53/90 ,  B01D2251/2062 ,  B01D2255/50 ,  B01J29/061 ,  B01J29/087 ,  B01J29/088 ,  B01J29/185 ,  B01J29/405 ,  B01J29/505 ,  B01J29/7057 ,  B01J29/7615 ,  B01J35/002 ,  B01J37/0246 ,  B01J2229/18 ,  B01J2229/24 ,  B01J2229/36

    摘要： The present invention is directed to a metal-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the zeolite beta is pre-treated so as to provide the zeolite with improved hydrothermal stability.The stabilized beta zeolite is provided by incorporating into the zeolite structure non-framework aluminum oxide chains. The aluminum oxide chains can be incorporated into the zeolite structure by a unique steaming regimen or by treatment with rare earth metals, such as cerium. The treatment process is unlike well-known methods of dealuminizing zeolites for the purpose of increasing the silica to alumina ratio. In the present invention, the non-framework aluminum oxide is characterized by FT-IR by a peak at 3781±2 cm−1, which when present, stabilizes the zeolite against further dealumination such as under oxidizing and harsh hydrothermal conditions.

    摘要翻译： 本发明涉及一种可用于用氨选择性催化还原氮氧化物的金属促进的沸石β催化剂，其中β沸石被预处理，以提供具有改进的水热稳定性的沸石。 稳定的β沸石是通过掺入沸石结构的非骨架氧化铝链来提供的。 氧化铝链可以通过独特的蒸汽方案或通过用稀土金属如铈处理而结合到沸石结构中。 处理过程不同于众所周知的用于增加二氧化硅与氧化铝比例的方法来使沸石脱铝。 在本发明中，非框架氧化铝的特征在于FT-IR在3781±2cm -1处的峰值，当存在​​时，其稳定化沸石进一步脱铝，例如在氧化和 恶劣的水热条件。

    Hydrothermally stable metal promoted zeolite beta for NOx reduction
    5.
    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：US06689709B1

    公开(公告)日：2004-02-10

    申请号：US09712210

    申请日：2000-11-15

    申请人： Pascaline H. Tran ,  Xinsheng Liu ,  James M. Chen ,  Gerard D. Lapadula ,  Howard Furbeck

    发明人： Pascaline H. Tran ,  Xinsheng Liu ,  James M. Chen ,  Gerard D. Lapadula ,  Howard Furbeck

    IPC分类号： B01J2906

    CPC分类号： B01D53/9418 ,  B01D53/8628 ,  B01D53/90 ,  B01D2251/2062 ,  B01D2255/50 ,  B01J29/061 ,  B01J29/087 ,  B01J29/088 ,  B01J29/185 ,  B01J29/405 ,  B01J29/505 ,  B01J29/7057 ,  B01J29/7615 ,  B01J35/002 ,  B01J37/0246 ,  B01J2229/18 ,  B01J2229/24 ,  B01J2229/36

    摘要： The present invention is directed to a metal-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the zeolite beta is pre-treated so as to provide the zeolite with improved hydrothermal stability. The stabilized beta zeolite is provided by incorporating into the zeolite structure non-framework aluminum oxide chains. The aluminum oxide chains can be incorporated into the zeolite structure by a unique steaming regimen or by treatment with rare earth metals, such as cerium. The treatment process is unlike well-known methods of dealuminizing zeolites for the purpose of increasing the silica to alumina ratio. In the present invention, the non-framework aluminum oxide is characterized by FT-IR by a peak at 3781±2 cm−1, which when present, stabilizes the zeolite against further dealumination such as under oxidizing and harsh hydrothermal conditions.

    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金属促进的沸石β催化剂，其中预处理沸石β以提供具有改进的水热稳定性的沸石。提供稳定的β沸石 通过掺入沸石结构非框架氧化铝链。 氧化铝链可以通过独特的蒸汽方案或通过用稀土金属如铈处理而结合到沸石结构中。 处理过程不同于众所周知的用于增加二氧化硅与氧化铝比例的方法来使沸石脱铝。 在本发明中，非骨架氧化铝的特征在于FT-IR在3781±2cm -1处的峰，当存在时，稳定了沸石以防止进一步脱铝，例如在氧化和苛刻的水热条件下。

    Hydrothermally stable metal promoted zeolite beta for NOx reduction
    6.
    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。