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    Hydrogen-selective membrane
    3.
    发明授权
    Hydrogen-selective membrane 失效
    氢选择膜

    公开(公告)号：US5652020A

    公开(公告)日：1997-07-29

    申请号：US593013

    申请日：1996-01-29

    申请人： John P. Collins ,  J. Douglas Way

    发明人： John P. Collins ,  J. Douglas Way

    IPC分类号： B01D53/22 ,  B01D53/86 ,  B01D71/02 ,  C01B3/04 ,  C01B3/50 ,  B05D5/00 ,  B05D7/22

    CPC分类号： B01D67/0069 ,  B01D53/22 ,  B01D53/228 ,  B01D53/229 ,  B01D53/8634 ,  B01D69/141 ,  B01D71/022 ,  C01B3/047 ,  C01B3/505 ,  B01D2325/04 ,  C01B2203/041 ,  C01B2203/0465 ,  C01B2203/047 ,  C01B2203/0485 ,  C01B2203/0495 ,  Y02E60/364

    摘要： A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 .mu.m but typically less than about 20 .mu.m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m.sup.2. s at a temperature of greater than about 500.degree. C. and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500.degree. C. and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400.degree. C. and less than about 1000.degree. C. before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process.

    摘要翻译： 氢选择性膜包括具有沉积在陶瓷载体的内表面上的钯金属层的管状多孔陶瓷载体。 钯层的厚度大于约10微米但通常小于约20微米。 膜的氢渗透速率大于约1.0摩尔/ m 2。 s，温度大于约500℃，跨膜压力差约为1500kPa。 此外，在大于约500℃的温度和约700kPa的跨膜压力下，氢 - 氮选择性大于约600。 氢气可以使用膜与气体混合物分离。 该方法可以包括在将气体混合物流过隔膜的步骤之前将气体混合物加热到大于约400℃且小于约1000℃的温度的步骤。 气体的混合物可以包括氨。 氨通常使用催化剂如镍分解以提供氮和氢。 催化剂可以放置在管状陶瓷载体内。 气体混合物可以通过诸如来自IGCC工艺的废气的混合物的工业过程来提供。