| 초록 |
CHF3 (fluoroform, HFC-23), one of the most common F-gases, is primarily used as a useful refrigerant or used in the semiconductor industry. However, because of its significant global warming potential that is 11700 times higher than that of CO2, the effective method to prevent the release of CHF3 into the atmosphere should be established. To solve this problem, gas hydrate-based CHF3 capture was suggested as one of the solutions. In this study, the thermodynamic and structural properties of the mixed CHF3 + N2 gas hydrates were investigated with a primary focus on macroscopic phase behaviors and microscopic analyses. The three-phase (gas hydrate (H) – liquid water (LW) – vapor (V)) equilibria of the mixed CHF3 + N2 gas hydrates were measured at different CHF3 concentrations (10 , 20, 40, 60, 80, and 100 %). As the concentration of CHF3 decreases, the three-phase equilibriua were inhibited. The accurate structures of the mixed CHF3 + N2 gas hydrates were identified through powder X-ray diffraction, and further verified using 13C NMR and 19F NMR. The results from this study are expected to be helpful in understanding and developing a CHF3 capture process using gas hydrate formation. |
