High-Temperature, High-Pressure Volumetric Properties
of Propane, Squalane, and Their Mixtures: Measurement and PC-SAFT
Modeling
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Abstract
This study reports the high-temperature,
high-pressure density
data for propane, squalane, and their binary mixtures for five compositions
at temperatures to 520 K and pressures to 260 MPa. The density measurements
are obtained with a floating-piston, variable-volume, high-pressure
view cell. From the density data, the isothermal and isobaric excess
molar volumes upon mixing are computed. For the mixture compositions
studied here, the excess volume is mostly negative, showing a minimum
at 0.6550 mole fraction of propane and becomes less negative as the
propane concentration increases. The perturbed-chain statistical associating
fluid theory (PC-SAFT) equation of state (EoS) provides good representation
for the experimental data. A mean absolute percent deviation (δ)
of 1.4% is obtained with the PC-SAFT EoS when using propane and squalane
pure component parameters fit to density data at high-temperature,
high-pressure conditions