Experimental Vapor–Liquid Phase Equilibrium Analysis of the Binary Systems of Aniline with Xylene Isomers at 93.13 kPa

Abstract

In the present work, vapor−liquid phase equilibrium (VLE) analyses of binary systems of aniline with four isomers of xylene, comprising pxylene, m-xylene, o-xylene, and ethylbenzene, are reported at 93.13 kPa. The experimental VLE data was generated in a dynamic circulating vapor−liquid, and the data was found thermodynamically consistent using the Van Ness point-to-point consistency test. The experimental VLE data was regressed with the Wilson, NRTL, and UNIQUAC activity coefficient models to obtain the binary interaction parameters. No azeotropic or close-boiling behavior was observed in any of the binary pair, and these pairs were found suitable for separation through a conventional distillation method.

Experimental Study and Modeling of the Isothermal VLE Properties of the Supercritical C3H8 + Aniline Mixture at High Temperatures and High Pressures

“…Experimental activity coefficient γ i of components have been calculated using the measured VLE data ( PTxy ) as , γ i = y i P x i P i s a t where P i sat is the vapor-pressure of pure component , (aniline), x i and y i are the liquid and vapor phase mole fraction of component i in equilibrium state, P is the measured total pressure of the mixture (Table S1), γ i is the activity coefficient of component i in the liquid phase. Antoine type equation for aniline has been used to calculate of the vapor-pressure P i sat ln ⁡ P S false( normalkPa false) = 14.6574 − 3857.52 T false( normalK false) − 73.13 Derived values of the activity coefficient of aniline γ i in the liquid phase as a function of temperature at selected isobars are depicted in Figure .…”

“…The measured data were fitted to Wilson, NRTL, and UNIQUAC activity coefficient models to estimate the binary interaction parameters. Yadav et al reported VLE properties of binary systems of aniline with four isomers of xylene (xylene, m -xylene, o -xylene, and ethylbenzene) at 93.13 kPa. Maher et al studied VLE properties of aniline with acetone, acetonitrile, chlorobenzene, methanol, and 1-pentene at four isotherms between (277.35 and 393.15) K. Antoine type vapor–pressure equation of pure aniline has been reported by two authors. , …”

“…As one can see, the rate of the solubility of CH 4 in aniline considerable higher than C 3 H 8 .Activity Coefficients. Experimental activity coefficient γ i of components have been calculated using the measured VLE data (PTxy) as12,13…”