Abstract
Isothermal vapor–liquid equilibrium data were measured for the binary system 1,1,2,3,3,3-hexafluoro-1-propene +2,2,3-trifluoro-3-(trifluoromethyl)oxirane from (268 to 308) K using an apparatus based on the “static-analytic” method. The expanded uncertainties in the measurements were evaluated as 0.05 K, 0.6 kPa, 0.002, and 0.003 for the temperature, pressure, and liquid and vapor mole fractions, respectively. The experimental data were correlated with the Peng–Robinson equation of state using the classical mixing rule and the Mathias–Copeman alpha function. No azeotropes were observed within the temperature and pressure range studied; however, the binary mixture had relative volatilities close to unity, indicating that separation of the mixture via standard distillation is not feasible.
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