Thermodynamic and Kinetic Effects of Methanol in the Formation of Tetrahydrofuran Hydrate

The formation of hydrate for laboratory study requires difficult conditions such as highpressure (about 50 bar), for this purpose tetrahydrofuran (THF), which can easily form structureII hydrate under atmospheric pressure, is often used as a model for study of hydrate formation. Inthis study, the experiments were conducted in a batch reactor under atmospheric pressure atinitial temperature of 2 °C. Methanol was added to the stoichiometric solution of water and THFat varying concentrations (0.5-2 wt%) as a hydrate inhibitor. The results indicate that methanolreduces the equilibrium temperature and acts as a thermodynamic inhibitor and also it can beused as a kinetics inhibitor by delaying nucleation and increasing the induction time. Therefore,the solution with concentration of 2 wt% methanol has the highest induction time and the lowestequilibrium temperature in the formation of THF hydrate.

کلیدواژه ها:

Hydrate ، Tetrahydrofuran ، Methanol ، Thermodynamic Inhibitor ، Induction Time