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PDMS中空纤维复合膜渗透汽化分离丙酮－水溶液

作者：李冰冰¹，² 王亮¹ 孙德¹ 许振良²

单位： 1长春工业大学化学工程学院，吉林长春 130012；

关键词：渗透汽化；PDMS；中空纤维膜；丙酮－水

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2011,31(5):18-24

摘要：

采用干湿相转化法纺制了聚砜(PSF)中空纤维超滤底膜，并采用溶液浸渍法制备了PDMS/PSF中空纤维复合膜。研究了PDMS膜的溶胀性能和PDMS/PSF膜渗透汽化性能，考察了PDMS/PSF膜的稳定性以及料液温度、料液丙酮浓度和渗透物侧压力等因素对膜渗透汽化性能的影响。结果表明，PDMS膜对丙酮有很强的吸附能力而对水的吸附能力则相对较弱，渗透液中丙酮浓度大于膜吸附液中丙酮浓度更远远大于浸泡液中丙酮浓度，连续操作72小时膜的渗透汽化性能保持稳定，渗透通量随料液温度以及料液浓度的升高而增加，分离系数随料液浓度的增加而降低，基本不受温度的影响。当丙酮浓度为5wt.%、料液温度为60℃时，渗透通量为632 g/(m2•h)，分离系数为35.8，乙醇和水的表观活化能分别为45.7和49 KJ/mol。

Polysulfone (PSF) ultrafiltration hollow fiber base membranes were fabricated by the dry/wet-spinning method. PDMS/PSF hollow fiber composite membranes were prepared by coating PDMS solution on the outer surface of the PSF ultrafiltration membranes using the dip-coated method. PDMS swelling behaviors and pervaporation performances of PDMS/PSF membranes were studied. PDMS/PSF membranes were used to separate dilute acetone aqueous by pervaporation. Membrane stability and the effects of feed temperature, feed concentration and permeate pressure on membrane performance were studied. Working for 72 hours continuously, the pervaporation performance of PDMS/PSF membrane kept stable. Swelling experiments showed that PDMS membrane has a strong adsorption capacity toward acetone and a weak absorption capacity to water; acetone concentration in permeate is greater than acetone concentration in the swelled membranes and is largely greater than acetone concentration in soaking solution. Permeate flux increased with the increases of feed temperature and feed concentration. Separation factor decreased with the increasing of feed concentration and is independent of feed temperature. When acetone concentration is 5wt.%, permeation flux is 632 g/(m2? h) and separation factor is 37. The apparent activation energy of ethanol and water were 45.7 and 49 KJ / mol.

基金项目：

作者简介：

李冰冰（1966-），女，博士，讲师，主要从事膜分离的研究,Email:lbb2006@hotmail.com

参考文献：

[1]. 李雅丽.国内外丙酮生产现状与市场分析.精细与专业化学品.2005,13(17):27-30
[2]. I.S. Maddox, The acetone-butanol-ethanol fermentation: recent progress in technology, Biotechnol. Genet. Eng. Rev. 7 (1989) 189.
[3]. T.Q. Nguyen and K. and Nobe. Extraction of organic contaminants in aqueous solutions by pervaporation. J. Memb. Sci., 30(1987)11.
[4]. K.W. Böddeker, Recovery of volatile bioproducts by pervaporation, in J.G.. Crespo and K.W. Böddeker (Eds), Memb. Processses in the Separation and Purification, NATO ASI Series E, Vol. 272, Kluwer Academic Publishers, 1994, p. 195
[5]. N. Qureshi, M.M. Meagher, Jicai Huang, R.W. Hutkins, Acetone butanol ethanol (ABE) recovery by pervaporation using silicalite-silicone composite membrane from fed-batch reactor of Clostridium acetobutylicum, J. Membr. Sci. 187 (2001) 93.
[6]. Lei Li, Zeyi Xiao, Shujuan Tan, Liang Pu, Zhibing Zhang, Composite PDMS membrane with high flux for the separation of organics from water by pervaporation, J. Membr. Sci. 243 (2004) 177.
[7]. 罗建全, 伊守亮等.渗透汽化法从丙酮-丁醇-乙醇中分离浓缩丁醇.化学工程, 2010,38(2)
[8]. Qureshi N, Blaschek H P. Butanol recovery from model solution/fermentation broth by pervaporation: evaluation of membrane performance. Biomass Bioenergy. 1999,17:175-184
[9]. [9] Qureshi N, Blaschek H P. production of acetone-butanol-ethanol (ABE) by a hyper-producing mutant strain of Clostridium beijerinckii BA101 and recovery by pervaporation. Biotechnol. Prog. 1999,15:594-602
[10]. [10] Qureshi N, Blaschek H P. butanol production using Clostridium beijerinckii BA101 hyperbutanol-producing matant strain and recovery by pervaporation. Appl Biochem Biotechnol. 2000,84:5-15
[11]. [11] Liu FF, Liu L, Feng XS. Separation of acetone-butanol-ethanol (ABE) from dilute aqueous solutions by pervaporation. Sep. & Purif. Technol. 2005,42:273-282.
[12]. Thongsukmak A, Sirkar K K. Pervaporation membranes highly selective for solvents present in fermentation broths. J.Membr.Sci.2007,302:45-58
[13]. 董永全,卫张林,陈欢林. 中空纤维渗透汽化膜分离研究现状与展望. 江西化工. 2007,4:7-11
[14]. 黄卫星,钟月华,肖泽仪等. 硅橡胶膜生物反应器及其用于乙醇发酵的研究. 四川大学学报. 2003,1(35):1-7
[15]. Tan S, Li, Xiao Z, Wu Y T, Zhang Z B. Pervaporation of alcoholic beverages-the coupling effects between ethanol and aroma compounds. J. Membr. Sci. 2005,264(1-2):129-136.
[16]. J Neel. Introduction to pervaporation, pervaporation membrane separation process. Edited by Y M Hugang. 1991:36-37.
[17]. Sittipong Amnuaypanich S, Ratpolsan P. Pervaporation membranes from natural rubber latex grafted with poly(2-hydroxyethyl methacrylate)(NR-g-PHEMA) for the separation of water-acetone mixtures. J. Appl. Polym. Sci. 2009,113(5):3313-3321.
[18]. Ghosh U K, Pradhan N C, Adhikari B. Separation of furfural from aqueous solution by pervaporation using HTPB based hydrophobic polyurethaneurea membranes. Desalination. 2007,208:156-158
[19]. T Kataoka at al. Journal of Chemical Engineering of Japan. 1991,24(3);330

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