Equilibrium Conditions and Structure Investigation for Methane Hydrate in the Presence of Propylene Oxide as a Thermodynamic Promoter

In this research, equilibrium conditions for methane gas hydrate and its structure were investigated in the presence of propylene oxide as a thermodynamic promoter. Research was based on a statistical thermodynamic method known as van der Waals-Platteeuw. By carrying out necessary modifications, a model was developed for calculations of activity and fugacity coefficients for prediction of equilibrium conditions for hydrate formation in the presence of hydrate promoter agents. Prediction of equilibrium conditions for methane hydrate in the presence of propylene oxide, based on SII and SH structures gave different results. Only results based on SH structure were in good agreement with experimental data.