Modeling the water-R134a partition coefficients of organic solutes using a linear solvation energy relationship

Article Abstract:

The partitioning from water into 1,1,1,2-tetrafluoroethane (R134a) has been measured. R134a is a widely used refrigerant used in automobiles and household appliances. Its critical temperature of 101.1 C is higher than that of CO2 while its critical pressure is lower than that for CO2. A linear solvation energy relationship is used in modeling the water-R134a partition coefficients of a set of organic solutes. Results show the partition coefficients can be predicted with an AARD of 30% by using a separate term for the tunable dipolarity/polarizability of the solvent.

Models, Analysis, Measurement, Dissociation, Dissociation reactions

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Measurement and modeling of the water-R143A partition coefficients of organic solutes using a linear solvation energy relationship

Article Abstract:

High-pressure spectroscopy was used to measure the water-R143a partition coefficients for a set of 13 organic solutes. The measurements of the water partition coefficients of the organic solutes were made in the gas and supercritical phases of 1,1,1-trifluoroethane (R-143a). To predict the measured water-R143a partition coefficients, a linear solvation energy relationship (LSER)O was developed using the Abraham descriptors of the solute and an additional solvent descriptor as independent variables.

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Kamlet-Taft solvatochromic parameters of the sub- and supercritical fluorinated ethane solvents

Article Abstract:

A study was conducted to determine the Kamlet-Taft parameters characterizing the dipolarity-polarizability and hydrogen bond acceptor liability for ethane and six fluorinated ethane solvents in the sub and supercritical areas of the phase diagram. Solvatochromic probe molecules were utilized to determine the parameters. Results indicated that the solubility parameter of supercritical fluids was linearly related to the fluid density.

Fluid dynamics, Molecules, Solvents, Ethanes, Ethane

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