resumo
Despite the increasing amount of research in the ionic liquids field, there are still quite unexplored themes. That is the case of the fluorinated ionic liquids (FILs) family, here defined as ionic liquids with fluorine tags longer than four carbon atoms. In this work, gas permeation properties of two fluorinated ionic liquids, tetrabutylammonium heptadecafluorooctanesulfonate and 1-ethyl-3-methylpyridinium perfluorobutanesulfonate, were studied. For that purpose, supported liquid membranes of the fluorinated ionic liquids were prepared using a polymeric porous membrane as supporting material, and their gas permeation properties for 10 different gases at 294 K were measured using a time-lag apparatus. The results show that the gas solubility of these FILs is of the same order of magnitude as gas solubilities for previously tested fluorinated ionic liquids and that solute size plays a more important role on gas diffusivity than viscosity. The perfluorocarbons and carbon dioxide separation performances were evaluated, and the results show that 1-ethyl-3-methylpyridinium perfluorobutanesulfonate is a better candidate than tetrabutylammonium heptadecafluorooctanesulfonate for the gas separation processes tested in this work.
palavras-chave
CARBON-DIOXIDE; SEPARATION PERFORMANCE; CO2/N-2 SEPARATION; BLOOD SUBSTITUTES; OXYGEN CARRIERS; CO2 CAPTURE; SOLUBILITY; MEMBRANES; DIFFUSIVITY; BIS(TRIFLUOROMETHYLSULFONYL)AMIDE
categoria
Engineering
autores
Pereiro, AB; Tome, LC; Martinho, S; Rebelo, LPN; Marrucho, IM
nossos autores
Isabel Maria Delgado Jana Marrucho Ferreira
Professor Catedrático
Liliana C. Tomé
Estudante de doutoramentoGrupos
Projectos
Development of New Oxygen Therapeutics using Fluorinated Ionic Liquids (PTDC/EQU-FTT/118800/2010)
agradecimentos
A. B. Pereiro would like to acknowledge Marie Curie Actions Intra-European Fellowships (IEF) for a contract under FP7-PEOPLE-2009-IEF-252355-HALOGENILS as well as for financial support of FCT/MCTES (Portugal) by way of Post-Doc Grant SFRH/BPD/84433/2012. L. C. Tome would like to thank the FCT (Fundacao para a Ciencia e a Tecnologia) for her Ph.D. grant (SFRH/BD/72830/2010). I. M. Marrucho acknowledges FCT/MCTES (Portugal) for a contract under Programa Ciencia 2007. The authors also wish to thank FCT (Fundacao para a Ciencia e Tecnologia) through Project PTDC/EQU-FTT/118800/2010. In addition, the authors are also grateful to Catarina Duarte for supplying the perfluoropropane.