مسعود مفرحی

Due to the application of glycols or alcohols as hydrate formation inhibitors, the exact knowledge on the phase behavior of both vapor-liquid and solid-liquid equilibria between water and glycols/alcohols is necessary. In the present work, the simplified perturbed-chain statistical association fluid theory (sPC-SAFT) equation of state duo to its capability for predicting the phase behavior of high complex systems are employed to correlate the Solid-Liquid equilibria of water ethylene glycol/methanol Mixtures. Excellent agreement between experimental data and model was observed when this equation of state with one adjustable binary interaction parameter was coupled with the Scatchard-Hildebrand regular solution model to calculate the freezing point of water in the presence of various concentrations of glycol/alcohols.