聚偏氟乙烯/聚二甲基硅氧烷渗透气化膜在丁醇分离中的应用

doi:10.3969/j.issn.0438-1157.2014.09.026

化工学报 ›› 2014, Vol. 65 ›› Issue (9): 3499-3504.DOI: 10.3969/j.issn.0438-1157.2014.09.026

聚偏氟乙烯/聚二甲基硅氧烷渗透气化膜在丁醇分离中的应用

杜广庆, 陈丽杰, 薛闯, 白凤武

大连理工大学生命科学与技术学院, 辽宁大连 116023

收稿日期:2013-12-24 修回日期:2014-03-07 出版日期:2014-09-05 发布日期:2014-09-05
通讯作者: 薛闯
基金资助:
国家自然科学基金项目（21306020，21376044）；教育部博士点基金（20130041120027）；辽宁省教育厅科学研究一般项目（L2013022）；中国博士后科学基金项目（2013M530904，2014T70257）；辽宁省博士科研启动基金（20141197）；中国科学院生物燃料重点实验室开放基金（CASKLB201303）；教育部留学回国人员科研启动基金。

Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery

DU Guangqing, CHEN Lijie, XUE Chuang, BAI Fengwu

School of Life Sciences and Biotechnology, Dalian University of Technology, Dalian 116023, Liaoning, China

Received:2013-12-24 Revised:2014-03-07 Online:2014-09-05 Published:2014-09-05
Supported by:
supported by the National Natural Science Foundation of China (21306020, 21376044), the Specialized Research Fund for the Doctoral Program of Higher Education of China (20130041120027), the Scientific Research Fund of Liaoning Provincial Education Department (L2013022), China Postdoctoral Science Foundation (2013M530904, 2014T70257), Doctor Startup Fund of Liaoning Province (20141197), the Open Research Fund from Biofuels Key Laboratory of Chinese Academy of Sciences in Qingdao Institute of Bioenergy and Bioprocess Technology (CASKLB201303) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry.

摘要/Abstract

摘要： 通过相转化法制备PVDF多孔支撑膜，在其上涂覆致密的PDMS分离层制备得到PVDF/PDMS复合膜，用于丁醇的分离纯化。以丁醇水溶液为原料液，流速为1.6 L·min^-1，丁醇浓度为15 g·L^-1，温度为37℃时， PVDF/PDMS复合膜的总通量为158.2 g·m^-2·h^-1，分离因子为17.3。向丁醇水溶液中按丁醇：丙酮：乙醇比例为6：3：1添加丙酮和乙醇模拟发酵液，PVDF/PDMS复合膜的总通量升高到189.5 g·m^-2·h^-1，分离因子降低到14.8。进一步考察了以丙酮-丁醇-乙醇（ABE）发酵液为原料液的渗透气化膜分离性能，发酵液中不存在菌体时，PVDF/PDMS复合膜的总通量和分离因子分别为120.2 g·m^-2·h^-1和19.7，而菌体存在时，复合膜的总通量和分离因子分别为122.1 g·m^-2·h^-1和16.7。与PDMS均质膜相比，PVDF/PDMS复合膜在丁醇分离过程中的分离性能有了显著的提升，具有潜在的应用价值。

关键词: 生物燃料, 生物分离, PVDF/PDMS复合膜, 渗透气化, 丁醇

Abstract: A polyvinylidene fluoride (PVDF)/polydimethylsiloxane (PDMS) composite membrane for butanol recovery was fabricated by coating a dense PDMS separation layer on a PVDF porous support layer prepared by phase inversion. The total flux and separation factor of the PVDF/PDMS composite membrane could be 158.2 g·m^-2·h^-1 and 17.3, respectively, when feed solution was 15 g·L^-1 butanol at 37℃ with a flow rate 1.6 L·min^-1. To simulate the fermentation liquor, acetone and ethanol were added into the feed solution in a ratio 6(butanol):3:1, the total flux of PVDF/PDMS composite membrane increased to 189.5 g·m^-2·h^-1, but separation factor decreased to 14.8. Furthermore, fermentation broths with/without biomass as feed solution were investigated to evaluate pervaporation performance of the PVDF/PDMS composite membrane. The total flux and separation factor were 120.2 g·m^-2·h^-1 and 19.7 for without biomass case, 122.1 g·m^-2·h^-1 and 16.7 for with biomass case, respectively. Compared with PDMS membrane, the performance of PVDF/PDMS composite membrane had significant improvement for butanol recovery, indicating that it is of potential for industrial application of butanol recovery.

Key words: biofuel, bioseparation, PVDF/PDMS composite membrane, pervaporation, butanol

中图分类号:

Q939.9

杜广庆, 陈丽杰, 薛闯, 白凤武. 聚偏氟乙烯/聚二甲基硅氧烷渗透气化膜在丁醇分离中的应用[J]. 化工学报, 2014, 65(9): 3499-3504.

DU Guangqing, CHEN Lijie, XUE Chuang, BAI Fengwu. Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery[J]. CIESC Journal, 2014, 65(9): 3499-3504.

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聚偏氟乙烯/聚二甲基硅氧烷渗透气化膜在丁醇分离中的应用

Application of polyvinylidene fluoride/polydimethylsiloxane composite membrane in butanol recovery

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