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Received November 8, 2010
Accepted December 31, 2010
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A modification of Wong-Sandler mixing rule for the prediction of vapor-liquid equilibria in binary asymmetric systems
Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran 1Department of Chemical Engineering, Faculty of Engineering, Islamic Azad University of Tabriz, Tabriz, Iran
Korean Journal of Chemical Engineering, July 2011, 28(7), 1613-1618(6), 10.1007/s11814-010-0534-7
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Abstract
Systems consisting of light components and heavy hydrocarbons are highly asymmetric and industrially important. Design and control of facilities for separation and purification of such mixtures require vapor-liquid equilibrium data. Coupling of the cubic equation of state (EOS) with excess Gibbs energy models (EOS/Gex models) failed to represent the vapor-liquid equilibria (VLE) of such systems accurately. The main purpose of this work is to present a modification of Wong-Sandler mixing rule with using the composition dependent binary interaction parameter. Vaporliquid equilibria for 30 binary systems are calculated using the SRK equation of state with proposed model and Wong-Sandler mixing rule. Calculated pressures and mole fractions of vapor phase are compared with experimental data. The average absolute percentage deviation indicates that error involved in the application of modified Wong-Sandler model is less than Wong-Sandler model in most cases.
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Kalra H, Kubota H, Robinson DB, Ng HJ, J. Chem. Eng. Data., 23, 317 (1978)
Weng WL, Lee MJ, J. Chem. Eng. Data., 37, 213 (1992)
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Wiese HC, Jacobs J, Sage BH, J. Chem. Eng. Data., 15, 82 (1970)
Prodany NW, Williams B, J. Chem. Eng. Data., 16, 1 (1971)
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Kohn JP, Bradish WF, J. Chem. Eng. Data., 9, 5 (1964)
Shipman LM, Kohn JP, J. Chem. Eng. Data., 11, 176 (1966)
Lin HM, Sebastian HM, Simnick JJ, Chao KC, J. Chem. Eng. Data., 24, 146 (1979)
Djordjevich L, Budenholzer RA, J. Chem. Eng. Data., 15, 10 (1970)
Clark AQ, Stead K, J. Chem. Thermodyn., 20, 413 (1988)
Ohgaki K, Sano F, J. Chem. Eng. Data., 21, 55 (1976)
Mehra VS, Thodos G, J. Chem. Eng. Data., 10, 211 (1965)
Rodrigues ABJ, Mccaffrey DS Jr. Kohn JP, J. Chem. Eng. Data., 13, 164 (1968)
Bufkin BA, Robinson RL Jr, J. Chem. Eng. Data., 31, 421 (1986)
Joung SN, Yoo CW, Shin HY, Kim SY, Yoo KP, Lee CS, Huh WS, Fluid Phase Equilib., 185(1-2), 219 (2001)
Silva-Oliver G, Galicia-Luna LA, Fluid Phase Equilib., 182(1-2), 145 (2001)
Silva-Oliver G, Galicia-Luna LA, Sandler SI, Fluid Phase Equilib., 200(1), 161 (2002)
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