Decomposition of methane hydrates up to 15 kbar

The decomposition curve of methane hydrate under pressure shows a break at 6.2 kbar indicating the formation of a second hydrate; at 5 to 6 kbar the decomposition temperature of the first hydrate reaches a maximum at 47.7°C and the decomposition temperature of the denser hydrate increases to 57.3°C at 15 kbar.