| 초록 |
In this study, hydrate-based gas separation (HBGS) was adopted to capture SF6 and the kinetic selectivity of SF6 during the hydrate formation and dissociation process was closely examined via experimental and computation approaches. Time-dependent enclathrating and releasing behaviors of SF6 and N2 in the hydrate phase were analyzed using both in-situ Raman spectroscopy and gas chromatography. Furthermore, the kinetic selectivity of SF6 was also investigated using microsecond MD simulations. The SF6 composition in the hydrate phase was consistently higher than that of N2 and remained almost constant throughout the hydrate formation and dissociation, indicating that SF6 was a thermodynamically selective, but not kinetically selective. The results provide a better understanding of formation and dissociation kinetics of SF6 + N2 hydrates and will be helpful for designing and operating the hydrate-based SF6 separation process from SF6 + N2 gas mixtures. |
