A STUDY ON TERNARY VAPOR-LIQUID EQUILIBRIA FOR THE SYSTEM HEPTANE/METHYLCYCLOHEXANE/TOLUENE AT 101.325kPa

Authors : A A ÖZALP

Pages : 0-0

Doi:10.1501/Commub_0000000382

View : 35 | Download : 5

Publication Date : 1999-01-01

Article Type : Research Paper

Abstract :The isobaric separation of multicomponent mixtures by distillation require reliable vapor-liquid equilibrium data. Since the experimental determination of multicomponent vapor-liquid equilibrium data is laborious and time consuming there is a need to use a predictive method for the liquid phase activity coefficients. The estimated vapor-phase compositions are dependent on the predictive thermodynamic method used. The ternary vapor-liquid equilibrium data for the system, heptane/ methylcyclohexane/ toluene at 101.325 kPa have been chosen to compare the abilities of the three-suffix Margules and the UNIQUAC Equations in the prediction of isobaric ternary vapor-liquid equilibria with parameters estimated from the corresponding binary vapor-liquid equilibria compositions taken from the literature. The predictions with the three-suffix Margules equations was found to be little superior with overall root mean square deviations of ±0.0047 whereas the UNIQUAC equations could predict the ternary vapor compositions with overall root mean square deviations of ± 0.0061.
Keywords : VAPOR LIQUID, HEPTANE, METHYLCYCLOHEXANE

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