Prediction of phase equilibria for refrigerant mixtures of difluoromethane (HCF-32), 1,1,1,2-tetrafluoroethane (HCF-134a), and pentafluoroethane (HCF-125a) using SAFT-VR

Article Abstract:

The predictive power of the statistical associating fluid theory for chain molecules with attractive potentials of variable range (SAFT-VR) was found to be superior to the mean field versions of SAFT. This was shown in the application of the model for studying the phase equilibria for three binary mixtures formed by difluoromethane, 1,1,1,2-tetrafluoroethane and pentafluoroethane. Optimized parameters for the number and diameters of the spherical segments and strengths and ranges of the potentials of the site-site interactions were fitted to experimental data.

Models, Fluid dynamics, Vapor-liquid equilibrium, Hydrofluorocarbons, Refrigerants

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Predicting the high-pressure phase equilibria of methane + n-hexane using the SAFT-VR approach

Article Abstract:

The statistical associating fluid theory for chain molecules with attractive potentials for variable range was used to investigate the fluid-phase equilibria of the methane + n-hexane system. The system was found to exhibit a type V phase behavior, in which the two components display partial miscibility. The region of liquid-liquid immiscibility was accurately predicted by using the Lorentz-Berthelot mixing rules.

Methane, Hexane, Complex compounds, Coordination compounds

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SAFT-VRE: phase behavior of electrolyte solutions with the statistical associating fluid theory for potentials of variable range

Article Abstract:

A study is presented extending the authors' previous research into statistical associating fluid theory, the modelling of non-conformal fluids with attractive potentials of variable range, with focus on the use of strong-electrolyte solutions.

Electrolyte solutions, Thermodynamic potentials

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