High pressure phase behavior of carbon dioxide in 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids
authors Carvalho, PJ; Alvarez, VH; Machado, JJB; Pauly, J; Daridon, JL; Marrucho, IM; Aznar, M; Coutinho, JAP
nationality International
journal JOURNAL OF SUPERCRITICAL FLUIDS
author keywords 1-Ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide 1-Methyl-3-pentyl-imidazolium bis(trifluoromethylsulfonyl)imide; Carbon dioxide; Phase behavior; Supercritical; Experimental; High pressure
keywords GAS SOLUBILITY; THERMODYNAMIC PROPERTIES; MUTUAL SOLUBILITIES; ELEVATED PRESSURES; SURFACE TENSIONS; MOLTEN-SALTS; CO2; SYSTEMS; TEMPERATURE; WATER
abstract New standards concerning environmental and safety issues are creating an increasing interest on ionic liquids as alternative solvents for a wide range of industrial applications. In this work, a new apparatus developed to measure vapor-liquid phase equilibrium in a wide range of pressures and temperatures was used to measure the phase behavior of the binary systems of carbon dioxide (CO(2))+1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide ([C(2) mim][Tf(2)N]) and CO(2)+1-methyl-3-pentyl-imidazolium bis(trifluoromethylsulfonyl)imide ([C(5) mim][Tf(2)N]) at temperatures up to 363 K and pressures up to 50 MPa. A thermodynamic consistency test, developed for systems with incomplete PTxy data and based on the Gibbs-Duhem equation, was applied to the experimental data measured in this work and the Peng-Robinson EoS using the Wong-Sandler mixing rule was used to describe the experimental data with excellent results. (C) 2008 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0896-8446
year published 2009
volume 48
issue 2
beginning page 99
ending page 107
digital object identifier (doi) 10.1016/j.supflu.2008.10.012
web of science category Chemistry, Physical; Engineering, Chemical
subject category Chemistry; Engineering
unique article identifier WOS:000264250800001
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