Hydrate Formation Conditions of Methane + Ethylene + Tetrahydrofuran + Water Systems

Hydrate formation conditions of (CH4 + C2H4) binary gas mixtures in the presence of tetrahydrofuran (THF) in water were measured in a sapphire cell using the “pressure search” method. The experimental temperature ranged from 277.7 K to 288.2 K, and the pressure ranged from 0.16 MPa to 4.08 MPa. The mole fraction of ethylene in the gas mixtures varied from 6.28 % to 100 %. The mole fraction of THF in the aqueous solution ranged from 4 % to 20 %. The experimental results demonstrated that, in contrast with the case of pure water, the hydrate formation pressures increase with the increase of ethylene composition in the gas mixture in the presence of THF in water.