Thermodynamic Behavior of the (Methylcyclopentane + Ethyl Acetate) Binary Liquid Mixture: Density at Several Temperatures and Vapor–Liquid Equilibrium at 25, 50, and 101.3 kPa

International audience ; The density and isobaric phase equilibria of thebinary system methylcyclopentane + ethyl acetate were investigatedfor the first time in this work. The density of the system wasmeasured at 101 kPa from 288.15 to 308.15 K for the entirecomposition range thanks to a vibrating tube densimeter. Positiveexcess molar volumes were observed and correlated by using aRedlich−Kister equation. New isobaric vapor−liquid equilibriumdata for the system methylcyclopentane + ethyl acetate weremeasured by means of a recirculation ebulliometer. The phaseequilibrium was measured at 25, 50, and 101.3 kPa. Equilibriumcompositions were determined indirectly from density measurementsof the liquid and condensed vapor phases. Some additional density and vapor−liquid equilibrium data measurements for thebinary system ethyl acetate + methylcyclohexane were performed for comparison with previously published results and validation ofthe experimental protocol. The methylcyclopentane + ethyl acetate binary mixture displays pronounced positive deviations fromideality and a positive azeotrope. Three thermodynamic consistency tests were employed to validate the produced data set. Thereported data were successfully correlated by the NRTL model, and the modified UNIFAC predictive model was also used.UNIFAC provides a very good description of the phase behavior at 101.3 kPa, whereas predictions are less accurate at low pressures(25 and 50 kPa).