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
Résumé
The density and isobaric phase equilibria of the
binary system methylcyclopentane + ethyl acetate were investigated
for the first time in this work. The density of the system was
measured at 101 kPa from 288.15 to 308.15 K for the entire
composition range thanks to a vibrating tube densimeter. Positive
excess molar volumes were observed and correlated by using a
Redlich−Kister equation. New isobaric vapor−liquid equilibrium
data for the system methylcyclopentane + ethyl acetate were
measured by means of a recirculation ebulliometer. The phase
equilibrium was measured at 25, 50, and 101.3 kPa. Equilibrium
compositions were determined indirectly from density measurements
of the liquid and condensed vapor phases. Some additional density and vapor−liquid equilibrium data measurements for the
binary system ethyl acetate + methylcyclohexane were performed for comparison with previously published results and validation of
the experimental protocol. The methylcyclopentane + ethyl acetate binary mixture displays pronounced positive deviations from
ideality and a positive azeotrope. Three thermodynamic consistency tests were employed to validate the produced data set. The
reported 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).
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manuscript_methylcyclopentane_EA_R3_Last version.pdf (1.34 Mo)
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Supporting_information_mC5_EA_R3.pdf (523.61 Ko)
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