<i>P</i>, ρ, <i>T</i> Measurements and Isobaric Vapor−Liquid−Equilibria of the 1,3,3-Trimethyl-2-oxabicycle[2,2,2]octane + Propan-1-ol Mixture: Cubic and Statistical Associating Fluid Theory-Based Equation of State Analysis

Abstract

Densities measured at pressures from (20 to 40) MPa and the temperatures (283.15, 298.15, 313.15, and 328.15) K and isobaric (vapor + liquid) equilibrium (VLE) at pressures of (33.33, 66.66, and 101.33) kPa are reported for the mixture {1,8-cineole(1,3,3-trimethyl-2-oxabicycle[2,2,2]octane) + propan-1-ol} in the whole composition range. Excess molar volumes, isobaric thermal expansions, and isothermal compressibilities were calculated from the density data. VLE data were correlated by means of three activity coefficient models [Wilson, nonrandom two-liquid (NRTL), and universal quasichemical activity coefficient (UNIQUAC)], and their thermodynamic consistency was determined. Four equations of state (EOS), namely, the Peng−Robinson, the Patel−Teja, statistical associating fluid theory (SAFT), and perturbed-chain statistical associating fluid theory (PC-SAFT), were used first to predict (interaction parameters, k ij, equal to zero) both the density and the VLE behavior of the system and second to correlate the VLE by adjustment of the interaction parameters for each EOS.