Reliable evaluation of temperature-independent parameters in correlation of vapour–liquid equilibrium data |
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Authors: | Jan Pavlí?ek Ivan Wichterle |
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Institution: | Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojova 2, 165 02 Praha, Czech Republic |
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Abstract: | A new algorithm/program has been elaborated for simultaneous processing of different sets of vapour–liquid equilibrium data. The program was tested with six binary hexane + isomeric pentanol systems, each of them measured at three different isobaric conditions and one isothermal system of tert-butyl-methyl-ether + 2-methyl-2-propanol measured at three different temperatures. The correlation uses the maximum likelihood method, taking into account real behaviour of vapour phase. The parameters obtained are valid within the whole temperature range of the data, and are consistent in comparison with those obtained from individual correlations of isobars or isotherms. Results are presented for the Wilson and NRTL equations. |
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Keywords: | Correlation Low-pressure vapour&ndash liquid equilibrium Temperature dependence of parameters Hexane Isomeric pentanols |
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