Computation of equilibrium hydrate formation temperature for CO2 and hydrocarbon gases containing CO2 in the presence of an alcohol, electrolytes andtheir mixtures

This work presents the applicability of a unified model to predict the CO2- rich gas and pure CO2 hydrate formation conditions in aqueous solutions con taining glycerol, methanol, ethylene glycol, electrolytes and their mixture s. A water activity model is introduced that combines the effect of the sol uble gases, an alcohol and electrolytes. Then this model is used together w ith the model of Holder et al. [Holder, G.D., Corbin, G., Papadopoulos, K.D ., 1980. Thermodynamic and molecular properties of gas hydrates from mixtur es containing methane, argon and krypton. Ind. Eng. Chem. Fundam. 19 (3) 28 2] to predict CO2-rich gas and CO2 hydrate formation conditions. The predic tions are in excellent agreement with experimental data. (C) 2000 Elsevier Science B.V. All rights reserved.