Effect of feed gas composition on the separation of CO2/CH4 mixtures by PES-SAPO 34-HMA mixed matrix membranes


Cakal U., YILMAZ L. , KALIPÇILAR H.

JOURNAL OF MEMBRANE SCIENCE, vol.417, pp.45-51, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 417
  • Publication Date: 2012
  • Doi Number: 10.1016/j.memsci.2012.06.011
  • Title of Journal : JOURNAL OF MEMBRANE SCIENCE
  • Page Numbers: pp.45-51
  • Keywords: Mixed matrix membrane, CO2/CH4 separation, Binary gas mixtures, Polyethersulfone, SAPO-34, CARBON-DIOXIDE, TRANSPORT-PROPERTIES, GLASSY-POLYMERS, SILICONE-RUBBER, PURE, PERMEATION, CO2, ANTIPLASTICIZATION, POLYCARBONATE, PERFORMANCE

Abstract

The performance of zeolite and low molecular weight additive incorporated polyethersulfone (PES) membranes on the separation of CO2/CH4 mixtures at 35 degrees C was investigated. Four types of membranes, pure PES, PES/ 2-hydroxy 5-methyl aniline (HMA), PES/SAPO-34 and PES/SAPO-34/HMA, were prepared by solvent evaporation method. The CO2 concentration in the feed was varied between 5 and 70% by volume. PES/SAPO-34 membranes had a total permeability coefficient of 3 Barrer for an equimolar mixture, which was the highest permeability among all membranes. The highest separation factor, which was approximately 40 for CO2 over CH4, was obtained from PES/SAPO-34/HMA(4%) membrane. The addition of HMA considerably influenced the separation performance of PES/SAPO-34 membrane. The permeabilities increased with increasing concentration of CO2 in the feed whereas the separation factors of membranes were independent of feed composition, which introduces a major advantage from industrial point of view since the membranes can be used with the same performance in the separation of CO2/CH4 mixtures regardless of mixture composition. (C) 2012 Elsevier B.V. All rights reserved.