Isobaric vapor-liquid equilibria and densities for the system ethyl 1,1-dimethylethyl ether + 2-propanol

Hugo Segura, Andrés Mejía, Ricardo Reich, Jaime Wisniak, Sonia Loras

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5 Scopus citations

Abstract

Vapor-liquid equilibrium (VLE) data at 50, 75, and 94 kPa have been determined for the binary system ethyl 1,1-dimethylethyl ether + 2-propanol, in the temperature range 323-344 K. The measurements were made in an equilibrium still with circulation of both the vapor and liquid phases. Excess volumes have been also determined from density measurements at 298.15 K. The system exhibits positive deviation from ideal behavior and azeotropic behavior in the range of experimental pressures. The excess volume of the system is negative over the whole mole fraction range. The activity coefficients and boiling points of the solutions were well correlated with the mole fraction by the Wohl, Wilson, UNIQUAC, NRTL equations and predicted by the UNIFAC group contribution method. Excess volume data were correlated using the Redlich-Kister expansion.

Original languageEnglish
Pages (from-to)685-702
Number of pages18
JournalPhysics and Chemistry of Liquids
Volume40
Issue number6
DOIs
StatePublished - 1 Dec 2002

Keywords

  • ETBE
  • Ether
  • Fuel oxygenating additive
  • Unleaded gasoline
  • Vapor-liquid equilibrium

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