Isothermal Phase Equilibria and Cage Occupancies for CH4 + CHF3 Mixed-Gas Hydrate System

Abstract

Isothermal phase equilibria for the CH 4 + CHF 3 mixed-gas hydrate system were investigated under three-phase equilibrium states at 291.1 K by using gas chromatography. In addition, the single-crystals of mixed-gas hydrate were analyzed by means of Raman spectroscopy. One of the most important findings in the present study is that there is no hy- drate-structural transition, as the composition of mixed gas was varied at 291.1 K in the CH 4 + CHF 3 mixed-gas hydrate system.