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Issue
Korean Journal of Chemical Engineering,
Vol.31, No.6, 1049-1056, 2014
Extraction separation of toluene/cyclohexane with hollow fiber supported ionic liquid membrane
Zhang F, Sun W, Liu J, Zhang W, Ren Z
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.1 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.
Keywords: Supported Ionic Liquid Membrane; Separation; Toluene; Cyclohexane; Quantum Chemical Calculation
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[Cited By]
  1. Sribudda D, Wannachod T, Ramakul P, Pancharoen U, Phatanasri S, Korean Journal of Chemical Engineering, 33(1), 197, 2016
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