Abstract
AbstractPhase equilibria studies are of great significance for the development of hydrate-based techniques. In our previous work, a prediction method based on water activity measurement (WAM) has been developed for the efficient prediction of hydrate phase equilibria conditions. In this study, aiming at further testifying its universality and effectiveness, the water activity of NaCl/KCl/CaCl2 solutions was measured. The hydrate-water-vapor phase equilibria conditions of CH4/C2H6/C3H8/CO2 hydrate in different aqueous salt solutions were predicted by WAM method. The validity of the prediction method was subsequently evaluated by using related literature data. It was shown that the predicted result and literature data are in good agreement. This study further demonstrates the reliability and wide applicability of the WAM method for predicting hydrate phase equilibria conditions.KeywordsHydratePhase equilibriaWater activityChen-Guo model
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