圧縮荷重がメタンハイドレートペレットの分解に及ぼす影響

概要

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Gas hydrate is the material which contains molecules of gas in the molecules of H_2O having structure like cages. Natural Gas Hydrate (NGH) is equilibrium state at about -80 C under atmospheric pressure and NGH is expected to be stowed and transported in higher temperature due to its property so called "Self-Preservation Effect". When NGH can be transported under self-preservation condition, NGH can be used as more economical medium for transporting natural gas than LNG. We already confirmed that Methane Hydrate Pellets (MHPs), which is supposed to have similar properties to those of NGH pellets (NGHPs), can be transported at -20 C in view of self preservation property. On the other hand, cargoes are compressed in cargo holds due to acceleration including gravity and such compressive loading may affect on the self-preservation property of NGHPs. The purpose of this research is to examine the effect of compressive loading on self-preservation property of MHPs. We carried out experiments using MHPs under static compressive loading conditions at -20 C and concluded that static compressive loading is not the dominant factor on the dissociation rate of MHPs.
2004-03-25