Gas hydra 亡 e is the material which contains molecules ef gas in the molecules of H20 having structure iike cages . Natural Gas Hydrate (NGH)is equilibrium state at about − 80℃ under atmospheric pressure and NGH is expected to be stowed arld transpor 亡 ed in higher temperature due to its property so cal ! ed " Self − Preservation Effect " . When NGH can be transported under self − preservation condition , NGH can be used as more econornical medium for transporting natural gas than LNG . The purpose of the research is tQ examine the self − preservation property of methane hydrate , which is supposed to have similar properties to those of NGH , in the form of pellet . We carried out experiments using Methane Hydrate Pellets(MHP)and confirmed that MHP can be stowed at − 20℃ under atmospheric pressure containing acertain amount of gas .
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