Extraction separation of toluene/cyclohexane with hollow fiber supported ionic liquid membrane

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• 作者：Fan Zhang (1)
  Wei Sun (1)
  Junteng Liu (1)
  Weidong Zhang (1)
  Zhongqi Ren (1)
  
• 关键词：Supported Ionic Liquid Membrane ; Separation ; Toluene ; Cyclohexane ; Quantum Chemical Calculation
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2014
• 出版时间：June 2014
• 年：2014
• 卷：31
• 期：6
• 页码：1049-1056
• 全文大小：
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• 作者单位：Fan Zhang (1)
  Wei Sun (1)
  Junteng Liu (1)
  Weidong Zhang (1)
  Zhongqi Ren (1)
  
  1. Beijing Key Laboratory of Membrane Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
  
• ISSN：1975-7220

文摘

A supported liquid membrane with ionic liquid was used for the separation of toluene/cyclohexane. The interactions of ionic liquid with toluene and cyclohexane were calculated and experimentally studied by quantum chemical calculation and liquid-liquid extraction process. The results showed [BPy][BF4] have stronger interaction with toluene than that with cyclohexane. The selectivity of SILM processes was larger than 10 at the temperature of 323 K and the flow rate of 13.5 mL·min? on both shell side and lumen side. Due to the higher viscosity of IL, SILM process had good long-term stability. As the effects of mass transfer driving force of SILM process, the flux and removal efficiency increased with increase of initial toluene concentration, while the selectivity decreased because of the competitive transport. Base on the resistance in-series model and experimental results, the mass transfer resistance was mainly lay liquid membrane phase. The influence of flow rates on both sides was slight. The higher temperature could enhance the mass transfer performance significantly. The removal efficiency increased from 28.2% to 45.1% with the increasing of operation temperature from 298 K to 323 K.