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標題: Isothermal vapor-liquid equilibria for binary mixtures of benzene, toluene, m-xylene, and N-methylformamide at 333.15 K and 353.15 K
作者: Lee, K.J.
Chen, W.K.
Lee, L.S.
Chang, C.M.J.
Ko, J.W.
關鍵字: Vapor-liquid equilibrium;Density;Activity coefficient;Excess Gibbs;energy;systems;expression;densities;energy;nrtl
Project: Fluid Phase Equilibria
期刊/報告no:: Fluid Phase Equilibria, Volume 280, Issue 1-2, Page(s) 42-48.
Isothermal vapor-liquid equilibrium (VLE) at 333.15 K and 353.15 K for four binary mixtures of benzene+toluene, benzene+N-methylformamide, toluene+m-xylene and toluene+N-methylformamide have been obtained at pressures ranged from 0 kPa to 101.3 kPa. The NRTL, UNIQUAC and Wilson activity coefficient models have been employed to correlate experimental pressures and liquid mole fractions. The non-ideal behavior of the vapor phase has been considered by using the Soave-Redlich-Kwong equation of state in calculating the vapor mole fraction. Liquid and vapor densities were also measured by using two vibrating tube densitometers. The P-x-y diagram and the activity coefficient indicate that two mixtures of benzene + toluene and toluene + m-xylene were close to the ideal solution. However, two mixtures containing N-methylformamide present a large positive deviation from the ideal solution. The excess Gibbs energy in the benzene + toluene mixture is negative indicates that it is an exothermic system. (C) 2009 Elsevier B.V. All rights reserved.
ISSN: 0378-3812
DOI: 10.1016/j.fluid.2009.03.012
Appears in Collections:化學工程學系所

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