| 초록 |
Hydrate-based desalination method has been suggested as an attractive desalination method for high-concentrated waste water because the unique characteristics of hydrate formation makes impurities excluded. HFC-125a can be a promising hydrate-forming substance due to its advantages of operable P-T conditions for hydrate formation and low solubility in water. In this study, to verify the influence of NaCl on the thermodynamic stability of the HFC-125a hydrate, three-phase (H-Lw-V) equilibria in the presence of NaCl (0, 3.5, and 8.0 wt%) were determined. In addition, the gas consumption and conversion ratio of solutions to hydrates were also investigated to identify the influence of NaCl on hydrate formation. The inhibition effects on the hydrate stability and hydrate conversion ratio were increased with an increase in NaCl concentrations. As revealed by the quantitative analysis using in-situ powder X-ray diffraction, the kinetic retardation in the hydrate dissociation was observed in the presence of NaCl. |
