Membrane Separation of Ethanol from Mixtures of Gasoline and Bioethanol with Heat-Treated PVA membranes

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• 作者：Yohei Ueda ; Tomoyuki Tanaka ; Atsushi Iizuka ; Yuka Sakai ; Toshinori Kojima ; Shigeo Satokawa ; Akihiro Yamasaki
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：January 19, 2011
• 年：2011
• 卷：50
• 期：2
• 页码：1023-1027
• 全文大小：207K
• 年卷期：v.50,no.2(January 19, 2011)
• ISSN：1520-5045

文摘

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鈭?1%. High ethanol selectivity was observed irrespective of the heat-treatment time, and a maximum flux was observed at 3 min heat treatment at 75 掳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路m^鈭?路h^鈭?) for commercially available E10 (10 wt % ethanol) gasoline.