alexa Investigation on Nanocomposite Membranes for High Press
ISSN: 2155-9589

Journal of Membrane Science & Technology
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Research Article

Investigation on Nanocomposite Membranes for High Pressure CO2/CH4 Separation

Xuezhong He and May-Britt Hägg

Department of Chemical Engineering, Faculty of Natural Sciences, Trondheim, Norway

*Corresponding Author:
Xuezhong He
Department of Chemical Engineering, Faculty of Natural Sciences
Norwegian University of Science and Technology, NO-7491
Trondheim, Norway
Tel: +47 73593942
Fax: +47 73594080
E-mail: xuezhong.he@ntnu.no

Received date: May 25, 2017; Accepted date: June 5, 2017; Published date: June 6, 2017

Citation: He X, Hägg MB (2017) Investigation on Nanocomposite Membranes for High Pressure CO2/CH4Separation. J Membr Sci Technol 7:169. doi:10.4172/2155-9589.1000169

Copyright: © 2017 He X, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

The novel nanocomposite membranes were prepared for CO2/CH4 separation, and a good selectivity >30 at high pressure >30bar was obtained by testing a plate-and-frame module with a membrane area 110 cm2. The Joule- Thomson effect was found to have negligible influence on the temperature drop inside the membrane module due to the very high heat transfer coefficient for the membrane materials, which is different from the HYSYS simulation results. The water permeance was determined to be higher compared to CO2 permenace especially at high pressure, which indicated high water vapor content should be achieved in the feed gas to avoid the drying of the membrane and maintain high membrane separation performance in a real process. A two-stage membrane system was designed to purify CH4 from a 50% CO2/50% CH4 gas mixture, and the CH4 purity of 70% can be achieved in the 2nd stage. Process simulation using HYSYS integrated with ChemBrane indicated that a multi-stage membrane system is needed to achieve the industrial requirement on the production of sweet natural gas.

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