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EnglishVapour-liquid equilibria (VLE) of binary mixtures of n-perfluorohexane plus a n-alkane (C-5-C-8) and of n-hexane plus a n-perfluoroalkane (C-5-C-8) were determined using a head-space gas-chromatographic technique. Excess molar Gibbs energies, G(E), for the systems investigated have been obtained by a least-square treatment of equilibrium data. Liquid-liquid equilibria (LLE) were determined by turbidimetry for n-perfluorohexane + n-CnH2n+2 (n = 6-8) mixtures and the observed T-x curves compared with those predicted by the temperature dependence of activity coefficients. All mixtures show strong positive deviations from ideality, which increase with the size of the second component. Solute-solvent and solute-solute interactions have been examined by calculating and discussing solvation Gibbs energies and Kirkwood-Buff integrals. Perfluoroalkanes proved to be inert molecules that interact weakly with themselves as well as with alkanes.
| Autori interni: | |
| Autori: | DUCE C; TINE' M; LEPORI L; MATTEOLI M |
| Titolo: | VLE and LLE of perfluoroalkane + alkane mixtures |
| Anno del prodotto: | 2002 |
| Digital Object Identifier (DOI): | 10.1016/S0378-3812(01)00815-9 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11568/204471
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