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 improve-ment in this regard is currently state of the art. Accordingly, this study aims to develop a precise calcu-lation 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 con-ditions when the best strategy is employed to determine interaction parameters. The impressive perfor-mance 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.(c) 2022 Elsevier Ltd. All rights reserved.