Use of the approximation formula for the phase-equilibrium function in the analysis of periodic dephlegmation distillation in the separation of a binary mixture

被引:0
作者
A. I. Moshinskii
机构
[1] St. Petersburg Chemical-Pharmaceutical Academy,
关键词
mass transfer; equilibrium function; approximation; distillation;
D O I
10.1007/s10891-012-0730-x
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学科分类号
摘要
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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页码:917 / 925
页数:8
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