Effect of Allyl and Propargyl Alcohols on the Equilibrium Conditions of Methane Hydrate Formation

This study examined the stability of methane hydrate at a concentration of 20 mass % in aqueous solutions of allyl and propargyl alcohols. The research determined the position of the three-phase equilibrium «alcohol solution - hydrate - gas» in the pressure range of 3.68 to 9.53 MPa. A comparison of the data revealed that the equilibrium conditions for hydrate formation for both alcohols are the same at lower pressures. However, at higher pressures, the curve for allyl alcohol deviates towards lower temperatures by 0.6°C. The study found that these alcohols act as thermodynamic inhibitors of hydrate formation. From a practical viewpoint, these systems can be used in the gas industry to prevent hydrate formation and address issues related to formed hydrates.