Measurement of activity coefficients at infinite dilution of organic solutes in the ionic liquid 1-ethyl-3-methylimidazolium 2-(2-methoxyethoxy) ethylsulfate at T=(308.15, 313.15, 323.15 and 333.15)K using gas+liquid chromatography

(Vapour+liquid) equilibria, (VLE) excess molar enthalpies and infinite dilution activity coefficients of selected binary systems involving n-hexyl pyridinium bis(trifluoromethylsulphonyl)imide ionic liquid: Experimental and predictions using modified UNIFAC (Dortmund)

“…From figure 7, good agreement is observed between the experimental and literature values reported [22,23] except [21], which show a maximum deviation of ±0.00964 g Á cm À3 . It is also noticeable that there is a maximum deviation of ±0.0127 g Á cm À3 in reported literature values [26]. Figures 8 and 9, present a comparison between modified UNIFAC (Dortmund) predictions with experimental values.…”

Thermodynamic Parameters of a New Synthesized Tricationic Ionic Liquid Stationary Phase by Inverse Gas Chromatography

“…γ 13 ∞ coefficients at infinite dilution of the solute in an involatile solvent such as an ionic liquid is calculated using eq . , In eq , subscripts 1, 2, and 3 refer to the solute, carrier gas, and ionic liquid, respectively. V N is the net retention volume of the solvent, p 0 is the outlet pressure, j 2 3 p 0 is the mean column pressure, n 3 is the amount of liquid solvent on the column, T is the column temperature, p * 1 is the saturated vapor pressure of the solute at temperature T (calculated via Antoine equation,), B 11 is the second virial coefficient of pure solute, V 1 * is the molar volume of the solute as liquid, V 1 ∞ is the partial molar volume of the solute at infinite dilution in the solvent, and B 12 is the mixed second virial coefficient of the solute and carrier gas. The net retention volume V N , may be obtained from eqs , ,and , in which U 0 is the flow rate of the carrier gas (at 298 K), t G and t R are the retention times for an unretained gas (methane) and the solute, respectively, and j 2 3 is the pressure correction. where and Equation is the McGlashan and Potter’s equation to calculate B 11 and B 12 . The values T C and V C are the critical temperature and critical volume of the pure substance, and n is equal to the number of carbon atoms in the molecule. Selectivity at infinite dilution is equal to the ratio of γ i 3 ∞ to γ j 3 ∞ (eq ), where i and j are the components which are being separated in the solvent.…”

Activity Coefficients at Infinite Dilution of Various Solutes in Tetrapropylammonium Bromide + 1,6-Hexanediol Deep Eutectic Solvent

“…These were found using the calculation procedure described by Bahadur and coresearchers. 44 Equations developed by Everett 45 and Cruickshank et al 46 were used to compute γ 13 ∞ values along with other correlations described in the literature. 38 Critical pressures, critical volumes, ionization energies, and constants used in Antoine equation for vapor pressure calculations were taken from the literature.…”