Thermodynamic behaviour of ethanol+methanol+2-ethoxy-2-methylpropane system. Physical properties and phase equilibria |
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| Institution: | 1. ARC Training Centre for Advanced Technologies in Food Manufacture, School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia;2. Commonwealth Scientific and Industrial Research Organisation (CSIRO), 11 Julius Avenue, North Ryde, NSW 2113, Australia;1. State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China;2. Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of Minnesota, 1390 Eckles Ave., St. Paul, United States;3. Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China;1. Center of Innovative and Applied Bioprocessing (CIAB), Sector-81, Mohali 140306, India;2. Dr S S Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, India;3. National Agri-Food Biotechnology Institute (NABI), Sector-81, Mohali 140306, India;1. Department of Food Technology, School of Food Engineering, State University of Campinas (Unicamp), 13083-862 Campinas, SP, Brazil;2. Department of Food Science and Nutrition, School of Food Engineering, State University of Campinas (Unicamp), 13083-862 Campinas, SP, Brazil;3. Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil |
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| Abstract: | The densities, refractive indices and speeds of sound of ternary ethanol+methanol+2-ethoxy-2-methylpropane (ETBE) mixtures were determined at 298.15 K and atmospheric pressure, and were used to calculate the corresponding excess molar volumes and the deviations of the molar refractive index and isentropic compressibility from linear dependence on concentration. These excess and deviational quantities were best predicted by the equations of Radojkovic, Kohler and Jacob and Fitzner. Vapour–liquid equilibrium (VLE) data were obtained for the ternary system at 101.32 kPa, shown to pass thermodynamic consistency tests, correlated by means of the equations Wilson, NRTL and UNIQUAC, and compared with the results predicted by the ASOG-KT and original and modified UNIFAC methods and by the equations of Wilson, NRTL and UNIQUAC with interaction parameters obtained from data for the relevant binary systems. The agreement between the experimental data and the latter predictions was as good as was achieved by ASOG-KT and UNIFAC-Dortmund, which were the best of the group contribution methods. |
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