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    • 83. 发明公开
    • Gas purification method
    • Verfahren zur Reinigung von Gas
    • EP0904823A2
    • 1999-03-31
    • EP98306932.9
    • 1998-08-28
    • THE BOC GROUP, INC.
    • Jain, RaviTseng, James K.
    • B01D53/04B01D53/047
    • B01D53/0462B01D53/047B01D53/0476B01D53/261B01D2253/104B01D2253/108B01D2253/25B01D2257/108B01D2257/502B01D2257/504B01D2257/702B01D2257/80B01D2259/40001B01D2259/40056B01D2259/402B01D2259/4146B01D2259/416F25J3/04163F25J3/04169F25J2205/64F25J2205/82F25J2215/44Y02C10/08
    • An air prepurification process which includes, as a first step, a pressure swing adsorption process (A,B) in which the air (2) is passed through a bed of adsorbent which contains activated alumina (22a,22b), thereby effecting removal of substantially all moisture and most carbon dioxide from the feed air, and, as a second step, a temperature swing adsorption process (C,D) in which the dried feed air is passed through a bed of carbon dioxide-selective adsorbent (58a,58b), thereby removing substantially all of the carbon dioxide remaining in the feed air. The feed air may be passed through beds of hydrogen oxidation and carbon monoxide oxidation catalysts (54a,54b,56a,56b) between the first and second steps to convert any hydrogen and carbon monoxide in the feed air to water vapour and carbon dioxide, respectively, these components being removed from the feed air during the second step. The feed air may be optionally passed through a layer of a hydrocarbon selective adsorbent between (24a,24b) the first and second steps to remove hydrocarbons such as ethylene, propylene and propane. Other gases may be purified instead of air.
    • 一种空气预净化方法,其特征在于,作为第一步骤,包括使空气(2)通过含有活性氧化铝(22a,22b)的吸附剂床的变压吸附方法(A,B),从而除去 基本上所有的水分和大部分来自进料空气的二氧化碳,以及作为第二步的变温吸附方法(C,D),其中干燥的进料空气通过二氧化碳选择性吸附剂床(58a,58b ),从而基本上除去剩余在进料空气中的所有二氧化碳。 进料空气可以在第一和第二步骤之间通过氢氧化和一氧化碳氧化催化剂床(54a,54b,56a,56b),以将进料空气中的任何氢和一氧化碳分别转化成水蒸气和二氧化碳 ,这些部件在第二步骤期间从进料空气中除去。 进料空气可以任选地通过第一和第二步骤(24a,24b)之间的烃选择性吸附剂层,以除去烃如乙烯,丙烯和丙烷。 其他气体可以被净化而不是空气。