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

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

Research output: Contribution to journalArticle

Abstract

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 x 10(5) and 3.5 x 10(5) Pa) 1.5 and 3.5 bar and permeate outlet near 1 x 105 Pa (I bar). The permeabilities of the grafted membranes generally decreased by about two to three orders of magnitude compared with the untreated membranes. The CO2/N-2 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 N-2 separation and CO2 to hydrocarbon separation. (c) 2005 Elsevier B.V. Al
Original languageEnglish
Pages (from-to)101-107
JournalJournal of Membrane Science
StatePublished - 2006

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    Abidi, N., Sivade, A., Bourret, D., Larbot, A., Boutevin, B., Guida-Pietrasanta, F., & Ratsimihety, A. (2006). Surface modification of mesoporous membranes by fluoro-silane coupling reagent for CO2 separation. Journal of Membrane Science, 101-107.