Thermodynamics and limiting activity coefficients measurements for organic solutes and water in the ionic liquid 1-dodecyl-3-methylimidzolium bis(trifluoromethylsulfonyl) imide
Urszula Domańska-Żelazna , Michał Wlazło
AbstractBio-fuels like alcohols, including butan-1-ol are produced from biomass by fermentation, and distillation. Ionic liquids (ILs) are novel attractive solvents, which can be used for removing butan-1-ol from the aqueous fermentation broth. In this work, the 1-dodecyl-3-methylimidazolium bis(trifluoromethyl)sulfonylimide, [DoMIM][NTf2] is proposed as an extractive solvent. The temperature of fusion and the enthalpy of fusion, obtained with DSC, the density and viscosity of [DoMIM][NTf2] as a function of temperature have been measured over a temperature range (298.15–368.15) K. The limiting activity coefficients γ 13 ∞ , for 65 solutes including alkanes, cycloalkanes, alkenes, alkynes, aromatic hydrocarbons, alcohols, water, thiophene, tetrahydrofuran, ethers, and ketones in the [DoMIM][NTf2] were determined by gas–liquid chromatography at six temperatures from 318.15 K to 368.15 K. The partial molar excess Gibbs energies Δ G 1 E, ∞ , enthalpies Δ H 1 E, ∞ , and entropies Δ S 1 E, ∞ at infinite dilution were calculated from the experimental γ 13 ∞ values obtained over the temperature range. The gas-liquid partition coefficients, K L were calculated for all solutes and the Abraham solvation parameter model was discussed. The selectivity and capacity for butan-1-ol/water separation problem were calculated from γ 13 ∞ and compared to literature values for bis(trifluomethyl)sulfonylimide-based ILs with different cations and with all available data for ILs.
|Journal series||Journal of Chemical Thermodynamics, ISSN 0021-9614|
|Publication size in sheets||0.5|
|Keywords in English||[DoMIM][NTf2]; Limiting activity coefficients; Thermodynamics; Density, Viscosity; The Abraham solvation parameter model|
|Score|| = 30.0, 28-11-2017, ArticleFromJournal|
= 35.0, 28-11-2017, ArticleFromJournal
|Publication indicators||: 2016 = 2.726 (2) - 2016=2.784 (5)|
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