Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/41476
標題: Vapor-liquid equilibria and density measurement for binary mixtures of o-xylene plus NMF, m-xylene plus NMF and p-xylene + NMF at 333.15 K, 343.15 K and 353.15 K from 0 kPa to 101.3 kPa
作者: Chen, W.K.
張傑明
Lee, K.J.
Chang, C.M.J.
Ko, J.W.
Lee, L.S.
關鍵字: Isothermal vapor-liquid equilibrium
Xylenes
NMF
Density
Excess Gibbs
energy
n-methylformamide
benzene
systems
water
expression
toluene
energy
期刊/報告no:: Fluid Phase Equilibria, Volume 291, Issue 1, Page(s) 40-47.
摘要: Isothermal vapor-liquid equilibria at 333.15 K, 343.15 K and 353.15 K for three binary mixtures of o-xylene, m-xylene and p-xylene individually mixed with N-methylformamide (NMF), have been obtained at pressures ranged from 0 kPa to 101.3 kPa over the whole composition range. The Wilson, NRTL and UNIQUAC 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 Peng-Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers. The excess molar volumes of the liquid phase were also determined. Three systems of o-xylene + NMF. m-xylene + NMF and p-xylene + NMF mixtures present large positive deviations from the ideal solution and belong to endothermic mixings because their excess Gibbs energies are positive. Temperature dependent intermolecular parameters in the NRTL model correlation were finally obtained in this study. (C) 2009 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/41476
ISSN: 0378-3812
文章連結: http://dx.doi.org/10.1016/j.fluid.2009.12.002
Appears in Collections:化學工程學系所

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