Effect of fabrication and process parameters on the morphology and performance of a PAN-based zeolite-filled pervaporation membrane
Effect of fabrication and process parameters on the morphology and performance of a PAN-based zeolite-filled pervaporation membrane
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DOI：
10.1016/s0376-7388(03)00287-4
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发表时间：
2003-09-15
影响因子：
9.5
通讯作者：
Yilmaz, L
中科院分区：
文献类型：
--
作者：
Okumus, E;Gürkan, T;Yilmaz, L
本研究的目的是开发一种新型的渗透汽化膜，用于共沸乙醇-水混合物的脱水，并考察膜制备和工艺参数对膜性能的影响。将沸石（3A、4A和13 X）作为填料添加到基础聚合物聚丙烯腈（PAN）中。据观察，流延溶剂的挥发性和退火温度强烈影响所制造的膜的性能和形态。扫描电子显微镜（SEM）显示，采用膜制备程序形成三层。它们是无沸石聚合物层、沸石填充聚合物层和表层。研究了进料组成、渗透侧压力、沸石种类及含量对膜性能的影响。得出的结论是，沸石含量决定膜的形态和控制传输机制的主导层。在约32重量%沸石，通量增加约9倍，选择性损失约7倍，相对于均质PAN膜。(C)2003 Elsevier B. V.保留所有权利。
The aim of this study is to develop a novel pervaporation membrane for dehydration of azeotropic ethanol-water mixture and to investigate the effect of membrane preparation and process parameters on the membrane performance. Zeolites (3A, 4A and 13X) are added as fillers to the base polymer poly [acrylonitrile] (PAN). It is observed that the volatility of the casting solvent and the annealing temperature strongly affect the performance and morphology of the manufactured membranes. Scanning electron micrographs (SEM) shows that with the membrane preparation procedure adopted three layers are formed. These are zeolite-free polymer layer, zeolite-filled polymer layer and a skin layer. The effect on the membrane performance of the feed composition, permeate side pressure, zeolite type and content are studied. It is concluded that the zeolite content determines the membrane morphology and the dominant layer controlling the transport mechanism. At about 32 wt.% zeolite, flux is increased about nine-fold with a loss of selectivity about seven-fold relative to homogeneous PAN membranes. (C) 2003 Elsevier B.V. All rights reserved.