Ice-Clathrate Hydrate-Gas Phase Equilibria for Argon plus Water and Carbon Dioxide plus Water Systems

In this communication, we report ice clathrate hydrate gas equilibrium data (dissociation data) for the argon + water and carbon dioxide + water systems in the temperature ranges of (264.3-271.2) and (260.2-270.7) K, respectively. The equilibrium data were generated using an isothermal pressure-search method. The new equilibrium data for carbon dioxide clathrate hydrates are compared with the equilibrium data reported in the literature to demonstrate the reliability of the experimental technique used in this work. The equilibrium data generated for argon clathrate hydrates are compared with a few sets of experimental data reported in the literature. It is found that such data for the latter clathrate hydrate are indeed scarce in the temperature range studied in our work. A comparison is finally made on the equilibrium conditions of argon, air, oxygen, nitrogen, and carbon monoxide clathrate hydrates.