Energy-saving Performance of Membrane Separation and Hybrid Membrane Separation/Distillation for Propylene/Propane Binary Systems

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  • YAMAKI Takehiro
    Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)
  • YOSHIMUNE Miki
    Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)
  • HARA Nobuo
    Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)
  • NEGISHI Hideyuki
    Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)

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  • プロピレン／プロパン混合物の分離を対象とした膜分離および蒸留とのハイブリッドプロセスの省エネルギー性評価

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<p>The energy-saving performances of membrane separation and hybrid membrane separation/distillation processes for a propylene/propane binary system were investigated using a process simulator, and the effect of stage-cut was assessed on product composition and propylene recovery ratio for one-stage and two-stage membrane separation processes as well as hybrid processes comprising a membrane separation unit and a distillation column. The propylene contents in the feed were 30, 60, 90, and 98 mol%. The optimum separation process based on the propylene content in the feed was based on the simulation results. A hybrid process was suitable for 30 mol% propylene, with the permeate and retentate streams fed into a distillation column after membrane separation of the mixture. High energy-saving performances were achieved for both the hybrid process and the membrane separation process for propylene contents of 60, 90, and 98 mol%.</p>

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