Thermodynamic study of molecular interaction-selectivity in separation processes based on limiting activity coefficients
Domanska, U; Karpinska, M; Wlazlo, M
| HERO ID | 4868370 |
|---|---|
| In Press | No |
| Year | 2018 |
| Title | Thermodynamic study of molecular interaction-selectivity in separation processes based on limiting activity coefficients |
| Authors | Domanska, U; Karpinska, M; Wlazlo, M |
| Journal | Journal of Chemical Thermodynamics |
| Volume | 121 |
| Issue | Elsevier |
| Page Numbers | 112-120 |
| Abstract | The effect of interactions between organic solvents and water on the interfacial and bulk properties of N-ethyl-N-methylmorpholinium dicyanamide, [EMMor][DCA] were discussed on the base of the limiting activity coefficients gamma(infinity)(13) values. The experimental gamma(infinity)(13) values were determined by gas-liquid chromatography at temperatures from (298.15 to 368.15) K for 61 assorted solutes-among them, alkanes (linear, branched, or cyclic), alkenes, alkynes, aromatic hydrocarbons, alcohols, water, thiophene, tetrahydrofuran, 1,4-dioxane, ethers, acetone, ketones, acetonitrile, pyridine, and 1-nitropropane. The partial molar excess Gibbs free energy Delta G(1)(E,infinity), the partial molar excess enthalpy Delta G(1)(E,infinity), and entropy at reference temperature T-ref Delta S-1(E,infinity) at infinite dilution were calculated from the experimental gamma(infinity)(13) values obtained over this temperature range. The gas-liquid partition coefficient K-L was calculated for each solute and discussed in light of the Abraham solvation parameter model. The density and viscosity of the [EMMor][DCA] as a function of temperature were also measured. The selectivity and capacity for six separation problems were calculated from gamma(infinity)(13) and compared to literature values for selected ionic liquids. These separation problems are central to the petroleum and organic chemistry industry. The data presented here shows that [EMMor][DCA] reveals large selectivity equal 140, 273, 538, 73.1, 87.5 and 10.2 in heptane/benzene, heptane/thiophene, heptane/ethanol, hexane/ethyl acetate, ethyl-tert-butyl ether, ETBE/ethanol and THF/water separation problems at T = 328.15 K. The capacities were 0.22, 0.42, 0.83, 0.17 and 2.97 for benzene, thiophene, ethanol, ethyl acetate, and water at the same temperature. (C) 2018 Elsevier Ltd. |
| Doi | 10.1016/j.jct.2018.02.014 |
| Wosid | WOS:000428715000013 |
| Url | https://linkinghub.elsevier.com/retrieve/pii/S0021961418300831 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Ionic liquid; [EMMor][DCA]; Experimental limiting activity coefficients; Thermodynamics; The Abraham solvation parameter model; Separation of binary mixtures |