Isobaric vapor-liquid equilibria for binary and ternary systems composed of ethanol, acetone, and 2-butanol at atmospheric pressure

The isobaric vapor-liquid equilibrium (VLE) data for three binary systems of ethanol + 2-butanol, acetone + 2-butanol, and ethanol + acetone and for one ternary system of ethanol + acetone + 2-butanol were measured at atmospheric pressure. The VLE data were obtained in various compositions of the systems by using an ebulliometer. The system was heated until the equilibrium state was reached that indicated by steady temperature. The liquid samples for these systems were analyzed by using a Gas Chromatography to obtain the compositions of the liquid phase. The ebulliometer was validated by measuring the equilibrium temperatures of binary system of ethanol + water and comparing the result with literature data. All the experimental data were correlated using the Wilson, NRTL, and UNIQUAC models to get interaction parameters. The reliability of the models was tested by comparing the temperature result of correlation with that of experimental data in terms of Average Absolute Deviation (AAD). The AAD T of the Wilson, NRTL, and UNIQUAC models were 0.2008, 0.1660, 0.1483, for the system ethanol + 2-butanol, 0.2001, 0.1886, 0.1830, for the system acetone + 2-butanol, 0.1584, 0.1697, 0.1540, for the system ethanol + acetone, 0.3566, 0.3485, 03587, for the system ethanol + acetone + 2-butanol, respectively.