Equilibrium Conditions for Carbon Dioxide Hydrates in the Presence of Aqueous Solutions of Alcohols, Glycols, and Glycerol

Abstract

Equilibrium conditions for carbon dioxide hydrates in the presence of aqueous solutions of methanol, ethanol, ethylene glycol, diethylene glycol, triethylene glycol, and glycerol were experimentally measured at temperatures ranging from (264.1 to 283.1) K and pressures up to 4.54 MPa using an isochoric method. On a mass fraction basis, the inhibiting effect on the carbon dioxide hydrate equilibria decreased in the following order: methanol > ethanol > ethylene glycol > glycerol > diethylene glycol > triethylene glycol. The order is the same as predicted by the Hammerschmidt equation.