Empirical Study on Formation and Dissociation of Methane Hydrate

Abstract

In order to confirm the hydrate characteristics the methane hydrate was formed under the conditions in sediments of simulated deep sea floor, at the natural interface of methane gas and water and with the forced stirring of gas and water. Formed hydrate was dissociated under conditions of depressurization and heating. The self preservation effects were tested after freezing to a lower temperature and gas stability in the hydrate was confirmed by burning the dissociated methane gas. As the results some features were obtained. To expedite a quick forming of hydrate heat absorption as well as stirring of gas and water are inevitable. Both of heating or depressurization is effective for dissociation but each presents different phenomena. Self preservation effect could be improved by selecting a suitable freezing temperature.