Henry's Law Constants and Infinite Dilution Activity Coefficients of Propane, Propene, Butane, 2-Methylpropane, 1-Butene, 2-Methylpropene, trans-2-Butene, cis-2-Butene, 1,3-Butadiene, Dimethyl Ether, Chloroethane, and 1,1-Difluoroethane in Benzene, Toluene, o-Xylene, m-Xylene, p-Xylene, and Styrene

Abstract

Henry's law constants and infinite dilution activity coefficients of propane, propene, butane, 2-methylpropane, 1-butene, 2-methylpropene, trans-2-butene, cis-2-butene, 1,3-butadiene, dimethyl ether, chloroethane, and 1,1-difluoroethane in benzene, toluene, o-xylene, m-xylene, p-xylene, and styrene in the temperature range of (250 to 330) K were measured by a gas stripping method, and partial molar excess enthalpies and entropies were evaluated from the activity coefficients. A rigorous formula for evaluating the Henry's law constants from the gas stripping measurements was used for the data reduction of these highly volatile mixtures. The estimated uncertainties are about 2 % for the Henry's law constants and 3 % for the infinite dilution activity coefficients. The Henry's law constants followed the order of increasing Henry's law constant with decreases in the normal boiling point temperature of the liquefied gas except polar gases. In general, the partial molar excess enthalpies and entropies of gases in the aromatics increase with decreases of the polarities of the gases and increasing molecular size of the gases.

Absorption of pressurized methane in normal and supercooled p-xylene revealed via high-resolution neutron imaging

“…Henry’s constant of methane in o -xylene ( o -C 8 D 10 ) was by about 59 bar higher than that in p -xylene ( p -C 8 D 10 ). A similar dependence of the Henry’s constant on the xylene isomerism was reported in the literature 62 for several hydrocarbon gases dissolved in o -xylene ( o -C 8 H 10 ) and in p -xylene ( p -C 8 H 10 ).…”

“…similar dependence of the Henry's constant on the xylene isomerism was reported in the literature62 for several hydrocarbon gases dissolved in o-xylene (o-C 8 H 10 ) and in p-xylene (p-C 8 H 10 ).…”

Henry's Law Constants and Infinite Dilution Activity Coefficients of Propane, Propene, Butane, 2-Methylpropane, 1-Butene, 2-Methylpropene, trans-2-Butene, cis-2-Butene, 1,3-Butadiene, Dimethylether, Chloroethane, 1,1-Difluoroethane, and Hexane in Tetrahydropyran

“…In Figures and , the Δ S E,∞ / R and Δ H E,∞ / RT 300 values of the hydrocarbons in THP are, respectively, plotted vs the carbon number of the solutes. These figures also include the excess properties of the same solutes in benzene . Figure shows that the Δ S E,∞ / R values of alkanes in benzene are positive and larger than those in THP, implying that a solute molecule introduced into benzene destroys the parallel planar structures formed in benzene.…”

Infinite Dilution Activity Coefficients as Constraints for Force Field Parametrization and Method Development

“…Measurement of IDAC can be conducted via a variety of techniques. IDACs are related to the slope of isothermal pressure–composition phase diagrams when the mole fraction tends to zero and are proportional to the Henry’s Law constant; thus, their measurement of depends on factors such as the volatility of solvent and solute . Techniques such as gas–liquid chromatography, , high-performance liquid chromatography, and differential ebulliometry ,, are traditionally used to measure activities in extremely dilute systems at varying concentrations, leading to the IDAC by extrapolation .…”