Phase Equilibria of Clathrate Hydrates of Ethane in the Presence of Silica Nanoparticles and Tetrahydrofuran Aqueous Solution

• Published in: Journal of chemical and engineering data 2024-01, Vol.69 (1), p.185-193
• Main Authors: Pahlavanzadeh, Hassan, Eslamimanesh, Ali, Zalani, Bahareh
• Format: Article
• Language: English
• Subjects: Vapor-Liquid Equilibria and Supercritical Fluid Equilibria
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/acs.jced.3c00430

Since the data for ethane gas hydrate are more limited compared to other gases, obtaining new equilibrium points in the presence of thermodynamic and kinetic additives can cover a wider range of ethane gas hydrate phase equilibria. In the present work, clathrate hydrate dissociation conditions have been measured for the systems containing C2H6 + pure water, C2H6 + THF aqueous solutions with concentrations of 0.3, 0.5, 1.0, 4.5, and 6.0 mass %, C2H6 + SiO2 nanofluids with concentrations of 0.003, 0.010, 0.015, and 0.030 mass %, and C2H6 + THF + SiO2 nanoparticles with concentrations of 0.3 and 0.5 mass % for THF and 0.010 mass % for SiO2. Pursuing an isochoric pressure search method, the equilibrium data have been obtained at temperatures between 271.5 and 294 K and at pressures up to 12.6 bar. Acceptable agreement of data for the pure water system in this experiment with those reported in the literature demonstrates the accuracy of the experimental method and good performance of the used apparatus. The results of this study can complement the previous studies in the field of ethane gas hydrate formation and provide sufficient data for tuning the parameters of the relevant thermodynamic model.