Environmental and Energy Engineering

Permeation through CO2selective glassy polymeric membranes in the presence of hydrogen sulfide

  1. Colin A. Scholes,
  2. Geoff W. Stevens,
  3. Sandra E. Kentish*

Article first published online: 31 MAR 2011

DOI: 10.1002/aic.12610

Issue

AIChE Journal

AIChE Journal

Volume 58, Issue 3, pages 967–973, March 2012

Additional Information

How to Cite

Scholes, C. A., Stevens, G. W. and Kentish, S. E. (2012), Permeation through CO2selective glassy polymeric membranes in the presence of hydrogen sulfide. AIChE J., 58: 967–973. doi: 10.1002/aic.12610

Author Information

  1. Dept. of Chemical and Biomolecular Engineering, Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC), The University of Melbourne, Victoria 3010, Australia

*Dept. of Chemical and Biomolecular Engineering, Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC), The University of Melbourne, Victoria 3010, Australia

Publication History

  1. Issue published online: 6 FEB 2012
  2. Article first published online: 31 MAR 2011
  3. Accepted manuscript online: 7 MAR 2011 12:14PM EST
  4. Manuscript Revised: 18 FEB 2011
  5. Manuscript Received: 28 SEP 2010

Funded by

  • Australian Government through its CRC Program to support this CO2CRC research project

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Keywords:

  • gas separation;
  • polymeric membranes;
  • carbon dioxide;
  • hydrogen sulfide;
  • competitive sorption

Abstract

Minor components present in feed gas streams can have a significant influence on the separation performance of polymeric membranes. Hydrogen sulfide is present in many of the processes where CO2 capture is possible and can therefore undergo competitive sorption with CO2 for transport through the membrane, as well as influence the membrane morphology inducing plasticization. This study investigates the change in CO2 permeability and CO2/N2 selectivity of two glassy polymeric membranes; polysulfone and 6FDA-TMPDA, when 500 ppm H2S is present in the gas mixture. The outcomes of this study reveal that H2S in trace amounts has a strong influence on the separation performance of both membranes. For both membranes, a plasticization partial pressure ∼0.5–0.6 kPa H2S is observed. H2S competitive sorption is also observed and is modeled by competitive dual-sorption theory. Results suggest that mixed gas permeation influences the amount of each gas immobilized within the Langmuir voids in addition to the expected competitive sorption effects. © 2011 American Institute of Chemical Engineers AIChE J, 2012

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