Experimental study on the formation and phase equilibria of methane hydrate in quartz sand media

In order to study the thermodynamic and kinetic characteristics of the formation of methane hydrate in quartz sand media at a small temperature range, the methane hydrate formation experiments were carried out at 273.75 K, 273.85 K and 273.95 K constant temperature water baths in a constant volume reactor.The results showed that:(1) the reaction temperature was lower, the reaction heat released faster during the formation of methane hydrate in the reactor.Compared with the 273.95 K, the first temperature rise was 0.9 K in the reactor of 273.75 K system, about 6 times that of the 273.95 K system; (2) with the increase of reaction temperature, the production and conversion rate of hydrate decreased gradually; (3) the reaction temperature was lower, the rate of formation was higher at the early stage.The hydrate film formed on the gas-liquid interface and the quartz sand surface hindered the further transfer between methane gas and water, so the consumption of methane gradually decreased as the reaction progressed.The production of methane hydrate in quartz sand media was expected to provide reference for the synthesis, storage and transportation of gas hydrates in industry.