Partial molar volumes of acidic gases in physical solvents and prediction of solubilities at high pressures

Abstract

Partial molar volumes at infinite dilution for three acidic gases (carbon dioxide, hydrogen sulfide, and sulfur dioxide) in four physical solvents (propylene carbonate, methyl cyanoacetate, N-formyl morpholine, and Selexol) have been obtained using our new dilatometer. These partial molar volumes, in combination with the Henry's law constants obtained previously, have been used in the Krichevsky–Kasarnovsky equation for predicting the solubilities of acidic gases in physical solvents at high pressures. Keywords: partial molar volume, solubility, physical solvents.

Solubility of Ethane in N-Formyl Morpholine

“…Xu et al , have measured the solubility and the partial molar volume of the acid gases in a number of physical solvents, including N -formyl morpholine.…”

Direct measurement of the heat of solution and solubility of carbon dioxide in 1-hexyl-3-methylimidazolium bis[trifluoromethylsulfonyl]amide and 1-octyl-3-methylimidazolium bis[trifluoromethylsulfonyl]amide

“…From this equation, Henry's law constants for CO 2 in [C 6 mim][NTf 2 ] can be obtained by directly extrapolating for zero concentration of the solute. Carroll and Mather (1992) and Xu et al (1992) have proposed a slightly different method of calculation by plotting ln(f 2 /x 2 ) against (p − p 1 ) which should yield a straight line with an intercept equal to ln (K H /p 0 ) and a slope equal to V ∞ 2 /RT . In Table 7 are listed the Henry's law constants calculated from the present solubility results together with those obtained from the recommended low pressure solubility data (Costa Gomes, 2007) and the data measured by Kumelan et al (2006).…”

Solubility and partial molar volume of carbon dioxide and ethane in crosslinked poly(ethylene oxide) copolymer

“…To take this dependence into account, the PMV of a dissolved gas in different materials, either liquids or polymers, at a given temperature, ought to be compared as a function of the solubility parameter (δ) of the solvents. Therefore, in Figure 10 our values for the PMV of carbon dioxide and ethane in the XLPEO copolymer at 25 °C, computed from eq 15, are compared with literature data for different liquids53–65 and rubbery polymers,47–50, 66–72 all of which plotted as a function of the solubility parameter of the solvent. Solubility parameters were taken from the literature,37, 73, 74 apart from the value related to the XLPEO copolymer, which was estimated by the relation between the solubility parameters and the Flory‐Huggins interaction parameter for a given polymer‐penetrant pair:75 where δ p and δ g are the solubility parameters of the polymer and the gas, respectively.…”

“… Comparison of partial molar volumes of carbon dioxide and ethane in the XLPEO copolymer (PEGMEA70) at 25 °C with literature data for liquids and rubbery polymers as a function of the solubility parameter of the solvent. Data for CO 2 were taken from Horiuti53 (acetone, methyl acetate, benzene, chlorobenzene, carbon tetrachloride), Hildebrand and Scott54 (methanol), Weiss59 (water), Moore et al60 (water), Kamiya et al62 (PDMS), Xu et al63 (propylene carbonate, methyl cyanoacetate, n ‐formyl morpholine), Cibulka and Heintz64 ( n ‐hexane, n ‐heptane, n ‐octane, n ‐decane, n ‐hexadecane, ethanol, 1‐propanol, 1‐butanol, 1‐octanol, 1‐decanol), Ashcroft and Isa65 ( n ‐heptane, n ‐octane, n ‐nonane, n ‐decane, n ‐dodecane, n ‐tetradecane, n ‐hexadecane, cyclohexane, methylcyclohexane, toluene), Hirose et al47 (low‐density polyethylene), Kamiya et al48–50 [poly(1,2‐butadiene), poly(ethylene‐ co ‐vinyl acetate), poly(dimethyl siloxane)], and Wang et al70 [poly(benzyl methacrylate)]. Data for ethane were taken from Horiuti53 (acetone, chlorobenzene, methyl acetate), Gjaldbaek and Hildebrand55 (perfluoroheptane, carbon disulfide, carbon tetrachloride, n ‐hexane, benzene), Hildebrand and Scott54 (acetone, methyl acetate, carbon tetrachloride, benzene, chlorobenzene), Masterton56 (water), Ng and Walkley57 ( n ‐hexane, benzene), Tiepel and Gubbins58 (water), Handa et al61 ( n ‐octane, methanol, ethanol, 1‐butanol, 1‐hexanol, 1‐octanol, 1‐decanol), and Kamiya et al48, 50, 72 [low density polyethylene, poly(1,2‐butadiene), poly(ethylene‐ co ‐vinyl acetate), poly(dimethyl siloxane)].…”