Liquid membranes for flue gas desulfurization

A. Sengupta, B. Raghuraman, K. K. Sirkar

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


A number of aqueous liquid membranes were tested to study their efficacy in flue gas desulfurization. A simulated flue gas containing SO2, CO2, O2, N2 and moisture was used as the feed gas. The candidate membrane liquids were immobilized in microporous polypropylene Celgard® 2400 films. Permeabilities of the above species through the liquid membranes and the selectivities were determined using a sweep gas technique at 25°C. The feed and sweep gases were kept at essentially atmospheric pressure. The liquids tested as membranes included water, and aqueous solutions of NaHSO3, Na2SO3, sulfolane, sulfolene, Fe2+ EDTA, and Fe3+ EDTA. Very favorable SO2 permeabilities, and SO2/CO2 and SO2/N2 selectivities were obtained using some of these immobilized liquid membranes. Experimental permeabilities of SO2 have been compared with predictions from equilibrium approximation as well as from non-equilibrium boundary layer approximation.

Original languageEnglish (US)
Pages (from-to)105-126
Number of pages22
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Jul 15 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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