Application of a generalized van der Waals equation of state to several nonpolar mixtures |
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| Institution: | 1. Institute of Materials, China Academy of Engineering Physics, P. O. Box 9071-12, Mianyang 621907, China;2. Science and Technology on Surface Physics and Chemistry Laboratory, P. O. Box 9072-35, Mianyang 621908, China;1. School of Basic Sciences, Indian Institute of Technology, Bhubaneswar, 751007, India;2. Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute Troy, NY, 12180, United States;1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China |
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| Abstract: | A generalized van der Waals equation of state, applied recently (Nguyen Van Nhu and Kohler, 1995) to the calculation of excess properties and phase equilibria for the mixture methane + ethane, is now extended to several nonpolar binary mixtures.Improved mixing rules for the van der Waals attractive term and for the correction term are proposed. With these mixing rules, the equation gives good agreement for vapour-liquid and liquid-liquid equilibria over a large temperature range for 29 binary mixtures. The agreement of mixture volumes and cross second virial coefficients is also satisfactory. |
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