کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
641501 | 1457001 | 2013 | 57 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Estimation of extraction properties of new imidazolide anion based ionic liquids on the basis of activity coefficient at infinite dilution measurements
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Estimation of extraction properties of new imidazolide anion based ionic liquids on the basis of activity coefficient at infinite dilution measurements Estimation of extraction properties of new imidazolide anion based ionic liquids on the basis of activity coefficient at infinite dilution measurements](/preview/png/641501.png)
چکیده انگلیسی
New ionic liquids, based on the 4,5-dicyano-2-(trifluoromethyl)imidazolide [TDI] anion proposed as a new electrolyte in Li-ion batteries, 1-butyl-3-methylimidazolium 4,5-dicyano-2-(trifluoromethyl)imidazolide, [BMIM][TDI] and the 1-butyl-3-methylpyridinium 4,5-dicyano-2-(trifluoromethyl)imidazolide, [BM3PY][TDI], were synthesized and purified. The basic thermal properties of the pure [BMIM][TDI] and [BM3PY][TDI] ionic liquids i.e. glass-transition temperatures, and the heat capacity change at glass transition have been measured using a differential scanning microcalorimetry (DSC). The densities, viscosities and surface tensions of [BMIM][TDI] and [BM3PY][TDI] in temperature range from 283.15 K to 363.15 K were measured. The density and viscosity correlation for these systems was tested by an empirical second-order polynomial and by the Vogel-Fucher-Tammann equation. The surface tensions of pure ionic liquid were measured at atmospheric pressure at five temperatures (298.15, 308.15, 318.15, 328.15 and 338.15) K. The surface thermodynamic functions such as surface entropy and enthalpy were derived from the temperature dependence of the surface tension values. The critical temperature, parachor and speed of sound for pure ionic liquids were described and compared with other ILs with the same cation. The activity coefficients at infinite dilution, γ13â were determined at the temperature range from 318.15 K to 368.15 K by gas-liquid chromatography in the ionic liquid [BMIM][TDI] and [BM3PY][TDI] for 67 solutes: alkanes, cycloalkanes, alkenes, alkynes, aromatic hydrocarbons, alcohols, water, thiophene, ethers, ketones and pyridine. The interaction of these 66 organic compounds and water with the ILs were described with the partial excess molar Gibbs energies, ÎG1E,â, enthalpies ÎH1E,â, and entropies TrefÎS1E,â at infinite dilution, calculated from the experimental γ13â values, obtained over the temperature range. The gas-liquid partition coefficients, KL were calculated for all solutes. The selectivities for different separation problems were calculated from γ13â and compared to literature values for N-methyl-2-pyrrolidinone (NMP), sulfolane, and other 1-butyl-3-methylimidazolium, or 1-butyl-3-methylpyridinium-based ionic liquids. Obtained values were compared to the literature values for the other ionic liquids, NMP and sulfolane. The selectivities in proposed extraction processes were not attractive in comparison with previously measured ILs, with exception of water/1-butanol system. However, in contrast with the former measured ILs, [BMIM][TDI] and [BM3PY][TDI] posses higher capacity for benzene and thiophene. The gas-liquid partition coefficients, KL were calculated for all solutes and the Abraham solvation parameter model was discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 118, 30 October 2013, Pages 242-254
Journal: Separation and Purification Technology - Volume 118, 30 October 2013, Pages 242-254
نویسندگان
Maciej Zawadzki, Leszek Niedzicki, WÅadysÅaw Wieczorek, Urszula DomaÅska,