Measurement and correlation of isobaric vapor-liquid equilibrium for the binary system of cyclopentane and tetrahydrofuran

Abstract

-Isobaric vapor-liquid equilibrium (VLE) data for the cyclopentane and tetrahydrofuran (THF) system were measured at 101.3 kPa by using an equilibrium still. Thermodynamic consistency of the experimental data was confirmed by means of the Herington method. The experimental data were correlated and calculated by the Margules, Van Laar and Wilson activity-coefficient models, respectively. The Wilson and Van Laar activity-coefficient models are better than the Margules activity-coefficient model based on the average absolute deviations of temperature and the vapor-phase composition. For the Wilson and Van Laar activity-coefficient models the average absolute deviations between the experimental and the calculated values were 0.24 K and 0.23 K for the boiling point, and 0.0040 for vapor-phase composition, respectively. These agree well with the experimental data. Therefore, it was shown that the Wilson and Van Laar activitycoefficient models satisfactorily correlate the experimental results of the cyclopentane and tetrahydrofuran system.

Isobaric Vapor–Liquid Equilibrium of Citronellal + Geraniol and Citronellal + Citronellol Binary Systems at 16.0 and 32.0 kPa

“…The comparison of experimental and calculated data is presented in Table and Figure along with their deviations. The results indicate that the data were in good agreement, giving an average absolute deviation ( AAD ) of not more than 1.0%, calculated using eqs and A D = [ T i s a t e x p − T i s a t c a l c ] italicAAD 0.25em T = 1 n ∑ i = 1 n | T exp − T calc | …”

“…The average absolute deviation ( AAD ) of the temperature and vapor fraction between experimental and correlated data, based on refs , was used to evaluate the accuracy of the results using eqs and , respectively. italicAAD 0.25em T = 1 italicNT ∑ i = 1 NT | T i exp − T i calc | italicAAD 0.25em y = 1 italicNy ∑ i = 1 Ny | y i exp − y i calc | where a ij , a ji , b ij , b ji , u ij , and u ji were the binary parameters of each model (Wilson, NRTL, and UNIQUAC, respectively).…”

MEASUREMENTS AND THERMODYNAMIC MODELING OF VAPOR-LIQUID EQUILIBRIA FOR BINARY SYSTEMS OF ISOPROPYL CHLOROACETATE WITH CYCLOHEXANE, ISOPROPANOL AND BENZENE AT 101.3 kPa

“…To ensure the reliability of the measured VLE data, the thermodynamic consistency test was performed by the Herington and van Ness method. The non-random two-liquid (NRTL) (Renon and Prausnitz, 1968;Liu et al, 2019), Wilson (Wilson, 1964;Li, 2014), and the universal quasi-chemical (UNIQUAC) (Abrams and Prausnitz, 1975) activity coefficient models were used to correlate the experimental VLE data and the binary interaction parameters for the three models were regressed. In addition, the calculation of the excess Gibbs energy for the three systems from the VLE data was listed.…”