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Isobaric Vapor-Liquid Equilibrium of Toluene and Cresol Systems  

Kang, Dong-Yuk (Department of Advanced Chemicals and Engineering, Chonnam National University)
Jang, Hoi-Gu (Department of Applied Chemical Engineering, Chonnam National University)
Han, Chang-Nam (Department of Advanced Chemicals and Engineering, Chonnam National University)
Rho, Seon-Gyun (Department of Applied Chemical Engineering, Chonnam National University)
Cho, Dong Lyun (Department of Advanced Chemicals and Engineering, Chonnam National University)
Kang, Choon-Hyoung (Department of Applied Chemical Engineering, Chonnam National University)
Publication Information
Korean Chemical Engineering Research / v.47, no.6, 2009 , pp. 755-761 More about this Journal
Abstract
To a first approximation, phase behavior of a system becomes increasingly skew in proportion to the boiling point difference of system-forming constituents. Therefore, phase behavior data of a system of a large boiling point difference are to be experimentally measured for thorough understanding of the thermodynamic characteristics of such system. In this work, isobaric vapor-liquid equilibrium of a mixture consisting of toluene and cresol, which shows a large boiling point difference of nearly $100^{\circ}C$ and is consequently expected to be considerably nonideal, was measured by using a recirculating equilibrium cell at various subatmospheric pressures ranging from 10 kPa to 60 kPa. The measured VLE data were correlated with NRTL and UNIQUAC models in a satisfactory manner and the accompanying thermodynamic consistency test represented soundness of the measurements. In addition, the excess molar volume of the mixture was also measured with a vibrating densitometer and correlated with a Redlich-Kister polynomial. A negative excess volume prevailed over the whole concentration range, which indicates a favorable attraction between toluene and cresol isomers and results in an extensive miscibility.
Keywords
Isobaric VLE; Toluene; Cresol; Thermodynamic Models; Thermodynamic Consistency Test; Excess Molar Volume;
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Times Cited By KSCI : 1  (Citation Analysis)
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