Thermophysical properties of {R-fenchone + ethanol} at several temperatures and pressures

• HmE,ρ, and related properties of the system R-fenchone + ethanol were studied.
• UNIFAC and COSMO-RS were tested to predict HmE. UNIFAC provides the best results with a maximum ΔAAD of 6.2%.
• Peng–Robinson, Peng–Robinson–Stryjek–Vera, SAFT and PC-SAFT were tested as predictive PρT models.
• Peng–Robinson–Stryjek–Vera predicts best the PρT (20–40 MPa) with maximum ΔAAD of 0.9% and average ΔAAD of 0.6%.

In this paper, experimental excess enthalpy and density values for the binary mixture {R-fenchone + ethanol} are reported at four temperatures (283.15, 298.15, 313.15 and 328.15) K and atmospheric pressure (virtually 0.1 MPa). Densities have been also measured at the same temperatures and pressures ranging from 20 MPa to 40 MPa. In all cases the whole composition range has been considered. Excess molar volumes, isothermal compressibilities and isobaric thermal expansions have been calculated from the volumetric data at the four working temperatures. Excess enthalpies have been predicted using the UNIFAC (Dortmund) method and the Quantum Continuum Method COSMO-RS: UNIFAC shows the best performance. Four equations of state (Peng–Robinson, Peng–Robinson–Stryjek–Vera with volume translation, SAFT, PC-SAFT) have been tested as predictive models of the P-ρ-T behavior. Stryjek–Vera EOS lead to the best results with an average in the percentage absolute average deviation of 0.6% and a maximum percentage absolute average deviation of 0.9%.

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