| abstract |
An object of the present invention is to store and transport hydrogen easily and safely using a conventionally used technique. A hydrogen hydrate is formed in water by maintaining a three-phase mixture X in which water 1, ice 2, and hydrogen 3 are mixed at a pressure of about 2000 atm and a temperature of about -25 ° C. Then, the water 1 is removed from the hydrogen hydrate mixed water 6 to separate the hydrogen hydrate 8, and the hydrogen hydrate 8 is stored under a storage condition of about atmospheric pressure and about -125 ° C. [Selection diagram] Fig. 1 |