Measurement and modeling of bubble and dew points of the carbon dioxide + tetrahydrofuran + water system

The bubble-and dew-point behavior of the carbon dioxide (1) + tetrahydrofuran (2) + water (3) system has been studied. Pressure-temperature isopleths were measured for the ternary system at x₁) 0.01,0.02,0.03,0.04,0.09, and 0.27 at a constant mole fraction of tetrahydrofuran, x₂) 0.05. The bubble-and dewpoint lines for the ternary systems were also measured at x₂) 0.01,0.03,0.05, and 0.07 for fixed composition of carbon dioxide (x₁) at 0.04 mol fraction and at x₂) 0.01,0.03,0.05,0.06, and 0.09 for a fixed composition of carbon dioxide (x₁) at 0.09, respectively. The pressure and temperature range from (1 to 6) MPa and (280 to 300) K, respectively. The experimental results for the ternary system have been modeled using the predictive Peng-Robinson-Stryjek-Vera (PRSV) equation of state with the Huron-Vidal-Orbey-Sandler (HVOS) mixing rule and the universal quasi-chemical activity coefficient (UNIQUAC) G^Emodel. Excellent agreements have been found between the experimental and the predicted values of the bubble and dew points of the ternary system throughout the composition range studied.