Pervaporation of binary and ternary mixtures of acetone, isopropyl alcohol and water using polymeric membranes: Experimental characterisation and modelling
Pervaporation of binary and ternary mixtures of acetone, isopropyl alcohol and water using polymeric membranes: Experimental characterisation and modelling
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DOI：
10.1016/j.ces.2014.02.009
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发表时间：
2014-08-01
影响因子：
4.7
通讯作者：
Gorak, Andrzej
中科院分区：
文献类型：
--
作者：
Koch, Katharina;Gorak, Andrzej
本文讨论了使用亲水性高分子膜PERVAP（TM）1210渗透汽化分离丙酮、异丙醇和水的二元和三元混合物的实验研究和数学模型。实验结果表明，水和有机物的渗透性的强烈增加与水的质量分数在饲料中的增加，而选择性下降。有机物渗透性的增加是由于水和有机物分子在通过膜传输过程中的耦合作用所致。然而，没有耦合之间的有机渗透可以确定的三元系统。进料温度对渗透率和选择性的影响相对较小。实验结果被用来确定合适的跨膜渗透蒸发传质模型，并确定各自的模型参数。传质模型集成在一个详细的速率为基础的渗透蒸发模型和模拟分离特性与实验数据吻合良好。在膜辅助分离过程中的适用性的调查膜和使用各自的质量传递模型在基于优化的工艺设计的适用性进行评估的三元系统。(C)2014爱思唯尔有限公司版权所有。
This paper discusses experimental investigations and mathematical modelling of pervaporation for binary and ternary mixtures of acetone, isopropyl alcohol and water using the hydrophilic polymeric membrane PERVAP (TM) 1210. The experimental results show a strong increase of water and organic permeances with increasing water mass fractions in the feed while selectivities are decreasing. The increasing organic permeances result from coupling effects between water and organic molecules during the transport through the membrane. However, no coupling between both organic permeances could be identified for the ternary system. The influence of the feed temperature on permeances and selectivities is comparatively smaller. The experimental results are used to identify appropriate trans-membrane mass transfer models for pervaporation and to determine the respective model parameters. The mass transfer models are integrated in a detailed rate-based model for pervaporation and simulated separation characteristics agreed well with experimental data. The applicability of the investigated membrane in a membrane-assisted separation process and the suitability for using the respective mass transfer models in an optimisation-based process design are assessed for the ternary system. (C) 2014 Elsevier Ltd. All rights reserved.