The effects of temperature and hydrate quantity on the dissociation kinetics of methane hydrate were studied in a 10 L quiescent reactor.A self-preservation phenomenon of methane hydrates was observed at a temperature below 273.15 K，and the dissociation rate was the least at 268.05 K during the experimental runs.The experimental results indicated that the pressure of the storage and transportation system depended on the hydrate quantity in the vessel.When the volume of the vessel was constant，the pressure of the system increased but dissociation percentage of the hydrate decreased with increasing hydrate quantity.The experimental results were useful for gas storage in the form of methane hydrate in large-scale industrial application.