Surface modification of mesoporous membranes by fluoro-silane coupling reagent for CO2 separation

N. Abidi, A. Sivade, D. Bourret, A. Larbot, B. Boutevin, F. Guida-Pietrasanta, A. Ratsimihety

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


The potential of hybrid organic-inorganic membranes for separating organic molecules from air, based on solubility selective mechanism, was evaluated. Alumina and titana membranes with average pore size near 4 nm were surface modified using trimethoxysilane fluorinated coupling reagent. The permeabilities to helium, nitrogen, methane, ethane, propane, butane and carbon dioxide were evaluated at feed pressures lying between (1.5 × 105 and 3.5 × 105 Pa) 1.5 and 3.5 bar and permeate outlet near 1 × 105 Pa (1 bar). The permeabilities of the grafted membranes generally decreased by about two to three orders of magnitude compared with the untreated membranes. The CO2/N2 permselectivity increased significantly in the case of the TiO2 grafted membrane. The membranes performances were compared and the TiO2 grafted membrane exhibits higher permselectivity and permeability, so that, it is a good candidate for CO2 to N2 separation and CO2 to hydrocarbon separation.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Feb 15 2006


  • Ceramic membrane
  • Fluorosilane
  • Gas permeation
  • Grafted membranes
  • Surface modification


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