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    Hydrogen recovery by pressure swing adsorption integrated with adsorbent membranes
    1.
    发明授权
    Hydrogen recovery by pressure swing adsorption integrated with adsorbent membranes 失效
    通过与吸附膜结合的变压吸附氢回收

    公开(公告)号：US5753010A

    公开(公告)日：1998-05-19

    申请号：US736846

    申请日：1996-10-28

    申请人： Shivaji Sircar ,  William Emil Waldron ,  Madhu Anand ,  Madhukar Bhaskara Rao

    发明人： Shivaji Sircar ,  William Emil Waldron ,  Madhu Anand ,  Madhukar Bhaskara Rao

    IPC分类号： B01D53/047 ,  B01D53/22

    CPC分类号： B01D53/047 ,  B01D2256/16 ,  B01D2257/50 ,  B01D2257/7022 ,  B01D2259/4006 ,  B01D53/0446

    摘要： A method for increasing product recovery or reducing the size of steam methane reformer and pressure swing adsorption systems utilized for hydrogen production. A significant portion of the hydrogen in the PSA depressurization and purge effluent gas, which is otherwise burned as fuel in the reformer, is recovered and recycled to the PSA system to provide additional high purity hydrogen product. This is accomplished by processing selected portions of the depressurization and purge effluent gas in adsorbent membrane separators to increase hydrogen content for recycle to the PSA system. Remaining portions of the depressurization and purge effluent gas which contain lower concentrations of hydrogen are utilized for fuel value in the reformer.

    摘要翻译： 一种用于提高产品回收率或减小用于氢气生产的蒸汽甲烷重整器和变压吸附系统的尺寸的方法。 回收再循环到PSA系统中的PSA减压和吹扫废气中的大部分氢，否则这些氢气作为燃料被燃烧，以提供额外的高纯度氢产物。 这是通过在吸附膜分离器中处理选定部分的减压和吹扫流出气体来实现的，以增加用于再循环到PSA系统中的氢含量。 含有较低浓度氢的减压和吹扫废气的剩余部分用于重整器中的燃料价值。

    Recovery of volatile organic compounds from gas streams
    6.
    发明授权
    Recovery of volatile organic compounds from gas streams 失效
    从气流中回收挥发性有机化合物

    公开(公告)号：US5779768A

    公开(公告)日：1998-07-14

    申请号：US619846

    申请日：1996-03-19

    申请人： Madhu Anand ,  Shivaji Sircar ,  Augustine Ivanhoe Dalton

    发明人： Madhu Anand ,  Shivaji Sircar ,  Augustine Ivanhoe Dalton

    IPC分类号： B01D53/00 ,  B01D53/04 ,  B01D53/047

    CPC分类号： B01D53/0462 ,  B01D53/002 ,  B01D2253/102 ,  B01D2253/104 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2256/10 ,  B01D2256/16 ,  B01D2256/18 ,  B01D2257/708 ,  B01D2259/40047 ,  B01D2259/40056 ,  B01D2259/40081 ,  B01D2259/4009 ,  B01D2259/402

    摘要： A condensable component present at low concentration in a feed gas mixture containing the condensable component and a noncondensable component is recovered by selective adsorption from the feed gas mixture in an adsorption step, the resulting adsorbed condensable component is desorbed by a heated purge gas in a regeneration step to yield a purge gas effluent enriched in desorbed condensable component, and the purge gas effluent is cooled to condense and recover the condensable component as a liquid. An improvement comprises, during a time period of the regeneration step in which the concentration of the condensable component in the purge gas effluent reaches a maximum value, (a) dividing the purge gas effluent into a first and a second portion, (b) cooling the first portion of the purge gas effluent to a temperature sufficient to condense substantially all of the condensable component present therein and recovering the resulting condensate therefrom, and (c) cooling a second portion of the purge gas effluent and combining the resulting cooled gas stream with the feed gas mixture to yield a total feed mixture for the adsorption step.

    摘要翻译： 通过在吸附步骤中从进料气体混合物中选择性吸附来回收在含有可冷凝组分和不可冷凝组分的进料气体混合物中低浓度存在的可冷凝组分，所得吸附的可冷凝组分在再生中被加热的吹扫气体解吸 逐步产生富集解吸的可冷凝组分的吹扫气体流出物，并将吹扫气体流出物冷却以冷凝并回收可冷凝组分作为液体。 改进包括在再生步骤的时间段内，其中净化气体流出物中的可冷凝组分的浓度达到最大值，（a）将净化气体流出物分成第一和第二部分，（b）冷却 净化气体流出物的第一部分达到足以冷凝基本上所有可冷凝组分的温度并从其中回收所得的冷凝物，和（c）冷却第二部分吹扫气流出物并将所得到的冷却气流与 进料气体混合物以产生用于吸附步骤的总进料混合物。

    Hydrogen recovery by adsorbent membranes
    7.
    发明授权
    Hydrogen recovery by adsorbent membranes 失效
    通过吸附膜回收氢气

    公开(公告)号：US5435836A

    公开(公告)日：1995-07-25

    申请号：US173457

    申请日：1993-12-23

    申请人： Madhu Anand ,  Madhukar B. Rao ,  Shivaji Sircar

    发明人： Madhu Anand ,  Madhukar B. Rao ,  Shivaji Sircar

    IPC分类号： B01D53/22 ,  C01B3/50 ,  C01B3/56 ,  B01D53/047

    CPC分类号： B01D53/229 ,  C01B3/501 ,  C01B3/56 ,  C01B2203/0405 ,  C01B2203/043 ,  C01B2203/047 ,  C01B2203/0475 ,  C01B2203/048

    摘要： Recovery of hydrogen from hydrogen-containing gas mixtures by pressure swing adsorption is increased by utilizing an adsorbent membrane to concentrate hydrogen in the pressure swing adsorption reject gas and recycling the resulting hydrogen-enriched stream to the feed of the pressure swing adsorption system. Lower compression requirements are realized compared with the use of polymeric membranes for the same service because the hydrogen-enriched stream is recovered from the adsorbent membrane as nonpermeate at essentially the membrane feed pressure. Simultaneous permeation of carbon dioxide and methane occur in the adsorbent membrane, which can be operated at feed pressures as low as 5 psig when hydrogen is used as a sweep gas.

    摘要翻译： 通过利用吸附剂膜将氢气在变压吸附废气中浓缩并将所得富氢物流再循环到变压吸附系统的进料中，通过变压吸附从含氢气体混合物中回收氢。 与使用相同服务的聚合物膜相比，实现了较低的压缩要求，因为在基本上膜进料压力下，富集的流从吸附膜回收为非渗透性。 在吸附剂膜中同时渗透二氧化碳和甲烷，当氢气用作吹扫气体时，其可以在低至5psig的进料压力下操作。

    Metal sulfide catalysts and methods of making same
    10.
    发明授权
    Metal sulfide catalysts and methods of making same 有权
    金属硫化物催化剂及其制备方法

    公开(公告)号：US07955588B2

    公开(公告)日：2011-06-07

    申请号：US12783663

    申请日：2010-05-20

    申请人： Madhu Anand ,  Brian C. Dunn ,  Glenn W. Dodwell

    发明人： Madhu Anand ,  Brian C. Dunn ,  Glenn W. Dodwell

    IPC分类号： B01J27/04 ,  B01J27/047 ,  B01J27/051 ,  B01J37/20 ,  C07C9/04

    CPC分类号： C01G39/06 ,  B01J27/04 ,  B01J27/047 ,  B01J27/051 ,  B01J37/031 ,  C01G31/00 ,  C01G41/00

    摘要： Methods and apparatus relate to catalysts and preparation of the catalysts, which are defined by sulfides of a transition metal, such as one of molybdenum, tungsten, and vanadium. Precursors for the catalysts include a metal ion source compound, such as molybdenum trioxide, and a sulfide ion source compound, such as thioacetamide. Once the precursors are dissolved if solid and combined in a mixture, homogenous precipitation from the mixture forms the catalysts. Exemplary uses of the catalysts include packing for a methanation reactor that converts carbon monoxide and hydrogen into methane.

    摘要翻译： 方法和装置涉及催化剂和制备催化剂，其由过渡金属的硫化物如钼，钨和钒中的一种所定义。 催化剂的前体包括金属离子源化合物，例如三氧化钼，以及硫化物离子源化合物，例如硫代乙酰胺。 一旦前体溶解如果固体并在混合物中组合，则从混合物中均匀沉淀形成催化剂。 催化剂的示例性用途包括将一氧化碳和氢气转化为甲烷的甲烷化反应器的填料。