Use of pervaporation for separating azeotropic mixtures using two different hollow fiber membranes |
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| Institution: | 1. Department of Applied Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran;2. Department of Mathematics, VNIT, Nagpur, Maharashtra, 440010, India;1. Institut de Chimie et des Matériaux Paris-Est (ICMPE), UMR 7182 CNRS – Université Paris-Est Créteil, 2 Rue Henri Dunant, 94320 Thiais, France;2. Laboratoire de Sciences des Matériaux et de l′Environnement (MESLAB), Université de Sfax pour le Sud, Route de la Soukra km 4 – BP no. 802, 3038 Sfax, Tunisia;3. Membrane Institute, Kuban State University, 149 Stavropolskaya Street, 350040 Krasnodar, Russia;1. Department of Mathematics, University of Rajasthan, Jaipur 302004, India;2. Department of Higher Mathematics, Gubkin Russian State University of Oil and Gas, Leninsky prospect, 65-1, Moscow 119991, Russia;1. Department of Chemistry, College of Natural Science, Arba Minch University, P.O.Box 21, Arba Minch, Ethiopia;2. Department of Analytical Chemistry, Faculty of Сhemistry, Voronezh State University, Universitetskaya Sq. 1, 394006 Voronezh, Russia |
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| Abstract: | The performance of a “two-membrane column” was demonstrated for the separation of water-ethanol and water-isopropanol azeotropic mixtures. The cellulose acetate and silicone rubber membranes which were employed for the strippers showed opposite permselectivity towards each component of the mixtures. The two strippers were connected together with liquid pumps installed between them. A great increase in overall separation factor (over 100) was obtained. The degree of separation was dependent upon the ratio of feed to reject rate. Azeotropic mixtures were successfully separated by using the two-membrane column. This column is expected to provide us with an energy-saving, high purity separation process |
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