Abstract
The purpose of this study was to measure and model isothermal binary vapour-liquid equilibrium (VLE) data for the water + butane-1,4-diol/butane-2, system to aid in the design of separation processes. P-T-x-y phase equilibrium measurements were determined at three temperatures from approximately 353 to 373 K, utilizing a apparatus. The phase equilibrium data were modelled using the γ – Φ approach with the Non-Random Two-Liquid and UNIQUAC activity coefficient models and the virial equation of state with the Hayden O'Connell correlation for the vapour correction. Thermodynamic consistency testing was performed using the point and area tests for the measured experimental VLE data. The experimental data sets passed both tests where the point and area test employed a tolerance of 0.01 and 10% respectively.
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