Liquid-liquid equilibrium of (1H,1H,7H-perfluoroheptan-1-ol + perfluoroalkane) binary mixtures

J. R. Trindade, A. M. A. Dias, M. Blesic, N. Pedrosa, L. P. N. Rebelo, L. F. Vega, J. A. P. Coutinho, I. M. Marrucho

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This work presents new liquid-liquid equilibrium data for mixtures of 1H,1H,7H-perfluoroheptan-1-ol and linear perfluoroalkanes from C6 to C9. Data were measured at atmospheric pressure by turbidimetry and at pressures up to 5 MPa using a laser light scattering technique. The coexistence curves have been fitted to renormalization group extended-scaling expressions with the critical temperature and molar fraction obtained from the fit. The soft-SAFT equation of state (EoS) was also used to describe the experimental data at both low and high pressures. A good description of the immiscibility gap was obtained with this approach although results seem to deteriorate at high pressures showing that the model cannot simultaneously describe the equilibrium and excess thermodynamic properties.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalFluid Phase Equilibria
Volume251
Issue number1
DOIs
Publication statusPublished - 15 Jan 2007

    Fingerprint

Keywords

  • 1H,1H,7H-perfluoroheptan-1-ol
  • Linear perfluoroalkanes
  • Liquid-liquid equilibrium
  • Renormalization group theory
  • soft-SAFT EoS

Cite this

Trindade, J. R., Dias, A. M. A., Blesic, M., Pedrosa, N., Rebelo, L. P. N., Vega, L. F., ... Marrucho, I. M. (2007). Liquid-liquid equilibrium of (1H,1H,7H-perfluoroheptan-1-ol + perfluoroalkane) binary mixtures. Fluid Phase Equilibria, 251(1), 33-40. https://doi.org/10.1016/j.fluid.2006.10.025