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Experimental vapour-liquid equilibrium data and modeling for binary mixtures of 1-butene with 1,1,2,3,3,3-hexafluoro-1-propene, 2,2,3-trifluoro-3-(trifluoromethyl)oxirane, or difluoromethane

Abstract : Novel isothermal (P-x-y) vapour-liquid equilibrium data are reported at three temperatures for each of the (1,1,2,3,3,3-hexafluoro-1-propene + 1-butene), (2,2,3-trifluoro-3-(trifluoromethyl)oxirane + 1-butene), and (difluoromethane + 1-butene) binary systems. The experimental values were measured on a "static-analytic" type apparatus which utilized two electromagnetic ROLSITM capillary samplers for repeatable and reliable equilibrium phase sampling and handling. The VLE results are correlated with in-house thermodynamic software based on the "PR-MC-WS-NRTL" model which comprises the Mathias-Copeman alpha function, Wong-Sandler mixing rule, and non-random two-liquid local composition activity model introduced in the Peng-Robinson equation of state. A maximum pressure azeotrope is observed at all temperatures studied for the (2,2,3-trifluoro-3-(trifluoromethyl)oxirane + 1-butene), and (difluoromethane + 1-butene systems), but not for the 1,1,2,3,3,3-hexafluoro-1-propene system. Liquid-liquid immiscibility is not observed for any of the systems studied over the range of temperatures investigated.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00876963
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Soumis le : vendredi 25 octobre 2013 - 14:54:17
Dernière modification le : mercredi 23 septembre 2020 - 04:26:37

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Shalendra C. Subramoney, Alain Valtz, Christophe Coquelet, Dominique Richon, Paramespri Naidoo, et al.. Experimental vapour-liquid equilibrium data and modeling for binary mixtures of 1-butene with 1,1,2,3,3,3-hexafluoro-1-propene, 2,2,3-trifluoro-3-(trifluoromethyl)oxirane, or difluoromethane. Journal of Chemical Thermodynamics, Elsevier, 2013, 61, pp.18-26. ⟨10.1016/j.jct.2013.01.017⟩. ⟨hal-00876963⟩

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