Membrane separation of ethanol from mixtures of gasoline and bioethanol with heat-treated PVA membranes

Yohei Ueda, Tomoyuki Tanaka, Atsushi Iizuka, Yuka Sakai, Toshinori Kojima, Shigeo Satokawa, Akihiro Yamasaki

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    15 Citations (Scopus)


    The pervaporation performance of heat-treated PVA membranes with varying degrees of saponification was examined for the separation of ethanol from mixtures with n-heptane, which simulates the on-board separation of ethanol from gasoline containing bioethanol. All of the PVA membranes showed high permselectivity for ethanol against n-heptane. The ethanol selectivity decreased slightly, but the permeation flux increased with decreasing degree of saponification. The ethanol weight fraction in the permeate was higher than 98% for all feed compositions studied for PVA-417 membrane with a degree of saponification of 78-81%. High ethanol selectivity was observed irrespective of the heat-treatment time, and a maximum flux was observed at 3 min heat treatment at 75 °C. The flux decreased with increasing heat-treatment temperature. The PVA membrane showed high ethanol selectivity (96.8% in the permeate) and flux (12.2 g·m-2·h-1) for commercially available E10 (10 wt % ethanol) gasoline.

    Original languageEnglish
    Pages (from-to)1023-1027
    Number of pages5
    JournalIndustrial and Engineering Chemistry Research
    Issue number2
    Publication statusPublished - 2011 Jan 19

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Industrial and Manufacturing Engineering


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