Clathrate hydrates stability conditions in the presence of aqueous solutions of environmentally friendly sugar-derived compounds: A precise thermodynamic approach

Such a significant standpoint is the development of environmentally safe materials that any improvement in this regard is currently state of the art. Accordingly, this study aims to develop a precise calculation procedure based on solution thermodynamic regulations to determine hydrate dissociation conditions in the complex systems comprised of gaseous hydrate formers and sugar-derived materials aqueous solutions. The developed methodology employs free-volume modification of the Flory-Huggins model for water activity calculation and then modified van der Waals-Platteeuw approach for hydrate dissociation conditions modeling in the intended systems. To this end, 29 systems of 11 hydrate formers, 11 sugar-derived compounds, and 528 data points are appraised, the results of which indicate the AARDs (%) of 0.13 (AAD = 0.35 K) and 4.66 (AAD = 0.15 MPa) in predicting hydrate dissociation conditions when the best strategy is employed to determine interaction parameters. The impressive performance of the method in representing the experimental data of the hydrate systems is reflected in the accomplishment of accurate water activity calculation. Green hydrate inhibition strategy and enriching sugar-derived products are the systems that can benefit from the achievements of this study.