Separation of Benzene/Cyclohexane by Vapor Permeation through Triethylene Glycol Liquid Membrane

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Vapor permeation of a benzene and cyclohexane mixture was studied using a liquid membrane of triethylene glycol (TEG), which is supported on the surface of a microporous hydrophobic membrane. Permeation experiments were conducted using a flat-type membrane cell under the conditions of atmospheric pressure on the feed side and a vacuum on the permeate side. Mixed vapors of benzene/cyclohexane and water were fed into the membrane cell by a carrier gas. The benzene vapor preferentially permeated through the TEG liquid membrane, that is, the TEG liquid membrane had a selectivity for the aromatic hydrocarbon. The separation factor for benzene over cyclohexane was around 8. This selectivity corresponded to the vapor-liquid equilibrium of hydrocarbons dissolved in TEG. Adding a salt to the TEG liquid membrane caused an increasing aromatic selectivity as well as a decreasing vapor permeation rate. This effect was examined using various salts, which were formulated using alkali metal and halogen ions. A liquid membrane of a TEG and KCl mixture showed a separation factor of over 400. KCl was the most effective agent to enhance the benzene selectivity. The ion components in the TEG liquid membrane may cause a kind of facilitated transport effect on the aromatic hydrocarbon vapor.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 36(9), 1070-1075, 2003-09-01

    公益社団法人 化学工学会

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各種コード

  • NII論文ID(NAID)
    10013414414
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    6730986
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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