Incipient Equilibrium Gas Hydrate Formation Conditions for The CO₂-CH₄-Neohexane-NaCl-H₂O and CH₄-Polypropylene Glycol-NaCl-H₂0 Systems

Abstract

Incipient equilibrium hydrate formation pressures for the methane-carbon dioxide-neohexane-sodium chloride-water system were measured between 274.1 and 276.2K. In addition, similar data were obtained for the methane-polypropylene glycol-sodium chloride-water system at temperatures ranging from 274.2 to 282.7K. The isothermal pressure search method was employed to locate the minimum pressure at a constant temperature. The concentration of methane on a water-free basis was 50% in the methane-carbon dioxide gas mixture.