Journal
PHYSICS AND CHEMISTRY OF LIQUIDS
Volume 56, Issue 1, Pages 80-90Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00319104.2017.1292514
Keywords
Surface tension; UNIFAC model; CPA EOS; chemical potential; density
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The present modelling study has been dedicated to determining the interfacial properties of binary and ternary liquid mixtures made up of tetrahydrofuran, 2-propanol and 2,2,4-trimethylpentane. The variation of the temperature is from 288 to 308 K. By using both UNIFAC activity model and the fugacity model based on the cubic plus association (CPA) equation of state (EOS), a model based on the equality of chemical potentials in the liquid and the surface layer is utilised to describe the liquid-vapour interface of these liquid mixtures. The surface tension, composition and density are simultaneously predicted. The results of this model show that experimental surface tension data are in a good agreement with the predicted ones. The model using CPA EOS and molar volume has a better performance than the one uses the UNIFAC activity model.
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