Separation of biohydrogen by supported ionic liquid membranes

L. A. Neves, N. Nemestóthy, V. D. Alves, P. Cserjési, K. Bélafi-Bakó, I. M. Coelhoso

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

This work studied the use of room temperature ionic liquids (RTILs) based on the 1-n-alkyl-3-methylimidazolium cation, in supported liquid membranes (SLMs), in order to use them as membrane materials for separation and enrichment of hydrogen from a gaseous mixture containing H2, CO2, and N2. Different RTILs, with different chain length of alkyl substituents on the imidazolium cation and different anions, were incorporated in a PVDF hydrophobic membrane in order to study its effect on the permeability and on the selectivity towards the gases present in the fermentation process. Experiments were conducted in a constant pressure system and temperature (30°C), and pure gas permeability/selectivity data were reported. Supported ionic liquid membranes (SILMs) have been found to be stable at the pressure studied. The highest permeability value (30.70 × 10-11 m2/s) was obtained for the PVDF membrane immobilized with the RTIL [OMIM][PF6]. The high slectivity values towards CO2, between 22 (for [OMIM][PF6]) and 35 (for [BMIM][BF4]), obtained indicates that these SILMs could be used for this process.

Original languageEnglish
Pages (from-to)311-315
Number of pages5
JournalDesalination
Volume240
Issue number1-3
DOIs
Publication statusPublished - May 15 2009

Fingerprint

Ionic Liquids
Liquid membranes
Ionic liquids
membrane
Membranes
permeability
Cations
Positive ions
cation
temperature
Temperature
Gas permeability
Chain length
Fermentation
Anions
Hydrogen
gas
Negative ions
Gases
fermentation

Keywords

  • Biohydrogen
  • Gas separation
  • Room temperature ionic liquids
  • Supported ionic liquid membranes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

Separation of biohydrogen by supported ionic liquid membranes. / Neves, L. A.; Nemestóthy, N.; Alves, V. D.; Cserjési, P.; Bélafi-Bakó, K.; Coelhoso, I. M.

In: Desalination, Vol. 240, No. 1-3, 15.05.2009, p. 311-315.

Research output: Contribution to journalArticle

Neves, L. A. ; Nemestóthy, N. ; Alves, V. D. ; Cserjési, P. ; Bélafi-Bakó, K. ; Coelhoso, I. M. / Separation of biohydrogen by supported ionic liquid membranes. In: Desalination. 2009 ; Vol. 240, No. 1-3. pp. 311-315.
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