Pervaporation with chitosan membranes .2. Blend membranes of chitosan and polyacrylic acid and comparison of homogeneous and composite membrane based on polyelectrolyte complexes of chitosan and polyacrylic acid for the separation of ethanol-water mixtures

被引:104
作者
Shieh, JJ [1 ]
Huang, RYM [1 ]
机构
[1] UNIV WATERLOO,DEPT CHEM ENGN,WATERLOO,ON N2L 3G1,CANADA
基金
加拿大自然科学与工程研究理事会;
关键词
blend membrane; polyelectrolyte complex; pervaporation; temperature dependence; composite membrane;
D O I
10.1016/S0376-7388(96)00279-7
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Three different types of blend membranes based on chitosan and polyacrylic acid were prepared from homogeneous polymer solution and their performance on the pervaporation separation of water-ethanol mixtures was investigated, It was found that all membranes are highly water-selective. The temperature dependence of membrane permselectivity for the feed solutions of higher water content (>30 wt%) was unusual in that both permeability and separation factor increased with increase in temperature. This phenomenon might be explained from the aspect of activation energy and suggested that the sorption contribution to activation energy of permeation should not always be ignored when strong interaction occurs in the pervaporation membrane system. A comparison of pervaporation performance between composite and homogeneous membranes was also studied, Typical pervaporation results at 30 degrees C for a 95 wt% ethanol aqueous solution were: for the homogeneous membrane, permeation flux = 33 g/m(2) h, separation factor = 2216; and for the composite membrane, permeation flux = 132 g/m(2) h, separation factor = 1008. A transport model consisting of dense layer and porous substrate in series was developed to describe the effect of porous substrate on pervaporation performance.
引用
收藏
页码:185 / 202
页数:18
相关论文
共 35 条
[1]  
ABE K, 1977, MAKROMOL CHEM, V178, P2285
[2]  
AGEEV YP, 1995, P 7 INT C PERV PROC, P52
[3]   SEPARATION OF LIQUID MIXTURES BY PERMEATION [J].
BINNING, RC ;
LEE, RJ ;
JENNINGS, JF ;
MARTIN, EC .
INDUSTRIAL AND ENGINEERING CHEMISTRY, 1961, 53 (01) :45-50
[4]   STUDY OF PERMEATION OF ORGANIC-SOLVENTS THROUGH POLYMERIC MEMBRANES BASED ON POLYMERIC ALLOYS OF POLYPHOSPHONATES AND ACETYL CELLULOSE .2. SEPARATION OF BENZENE, CYCLOHEXENE, AND CYCLOHEXANE [J].
CABASSO, I ;
JAGURGRO.J ;
VOFSI, D .
JOURNAL OF APPLIED POLYMER SCIENCE, 1974, 18 (07) :2137-2147
[5]   THE CHARACTERISTICS OF A PAA PSF COMPOSITE MEMBRANE FOR SEPARATION OF WATER ETHANOL MIXTURES THROUGH PERVAPORATION [J].
CHOI, HS ;
HINO, T ;
SHIBATA, M ;
NEGISHI, Y ;
OHYA, H .
JOURNAL OF MEMBRANE SCIENCE, 1992, 72 (03) :259-266
[6]  
GREENLAW FW, 1977, J MEMBRANE SCI, V2, P333, DOI 10.1016/S0376-7388(00)83261-5
[7]   INFLUENCE OF COMPOSITE MEMBRANE-STRUCTURE ON PERVAPORATION [J].
GUDERNATSCH, W ;
MENZEL, T ;
STRATHMANN, H .
JOURNAL OF MEMBRANE SCIENCE, 1991, 61 :19-30
[8]   A GENERALIZED SOLUTION DIFFUSION-MODEL OF THE PERVAPORATION PROCESS THROUGH COMPOSITE MEMBRANES .2. CONCENTRATION POLARIZATION, COUPLED DIFFUSION AND THE INFLUENCE OF THE POROUS SUPPORT LAYER [J].
HEINTZ, A ;
STEPHAN, W .
JOURNAL OF MEMBRANE SCIENCE, 1994, 89 (1-2) :153-169
[9]  
HEINTZ A, 1991, 5TH P INT C PERV PRO, P174
[10]   DEHYDRATION OF ISOPROPANOL BY PERVAPORATION USING AROMATIC POLYETHERIMIDE MEMBRANES [J].
HUANG, RYM ;
FENG, XS .
SEPARATION SCIENCE AND TECHNOLOGY, 1993, 28 (11-12) :2035-2048