Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

Solubilities of 1,1-difluoroethane (R152a), pentafluoroethane (R125), fluoroethane (R161), 1,1,1-trifluoroethane (R143a) and 1,1,1,2-tetrafluoroethane (R134a) in trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate ([P(14)666][TMPP]) from 302.2 K to 343.6 K and up to 1.14 MPa are presented in this work. Effects of fluorine atoms of fluorinated ethanes, the cations and anions of ionic liquids on the solubility behaviors are investigated by comparing the solubilities of fluorinated ethanes and ethane in different ionic liquids. Moreover, the partial molar enthalpies and partial molar entropies of solutions at infinite dilution limit for R161, R143a, R125, R134a and R152a in [P(14)666][TMPP] are obtained. The experimental results are successfully correlated with a modified Krichevsky-Kasarnovsky equation.