A formula dependent on two parameters has been proposed for the approximation of typical phase-equilibrium functions. This formula can be used for analysis of a number of mass-transfer processes, in particular, distillation, rectification, adsorption, etc. Using the dependence proposed, a mathematical model of periodic distillation of a binary mixture in the presence of a dephlegmator has been analyzed; in the dephlegmator, partial condensation of the separated mixture occurs in a nonstationary mode under certain supplementary conditions. Analytical expressions describing this process and convenient for calculations have been obtained.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 85, No. 4, pp. 843–850, July–August, 2012.
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Moshinskii, A.I. Use of the approximation formula for the phase-equilibrium function in the analysis of periodic dephlegmation distillation in the separation of a binary mixture. J Eng Phys Thermophy 85, 917–925 (2012). https://doi.org/10.1007/s10891-012-0730-x
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DOI: https://doi.org/10.1007/s10891-012-0730-x