Isothermal vapor-liquid equilibria for binary mixtures of benzene, toluene, m-xylene, and N-methylformamide at 333.15 K and 353.15 K

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Title:	Isothermal vapor-liquid equilibria for binary mixtures of benzene, toluene, m-xylene, and N-methylformamide at 333.15 K and 353.15 K
Authors:	Lee,KJ;Chen,WK;Lee,LS;Chang,CMJ;Ko,JW
Contributors:	化學工程與材料工程學系
Keywords:	SYSTEMS;EXPRESSION;DENSITIES;ENERGY;NRTL
Date:	2009
Issue Date:	2010-06-29 17:27:20 (UTC+8)
Publisher:	中央大學
Abstract:	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.
Relation:	FLUID PHASE EQUILIBRIA
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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