Water cavities of structure H clathrate hydrate stabilized by molecular hydrogen: Phase equilibrium measurements

A.R.C DUARTE; A. SHARIATI; L.J. ROVETTO; C.J. PETERS

JOURNAL OF PHYSICAL CHEMISTRY B

ACS Publications

Año: 2008 vol. 112 p. 1888 - 1889

1089-5647

In this experimental phase equilibrium study, we show for the first time that it is possible to stabilize structure sH of hydrogen clathrate hydrate with the help of some selected promoters. It was established that the formation pressures of these systems are significantly higher than that of structure sII of hydrogen clathrate hydrate when tetrahydrofuran (THF) is used as a promoter. Although no experimental evidence is available yet, it is estimated that the hydrogen storage capacity of structure sH can be as high as 1.4 wt % of H2, which is about 40% higher compared to the hydrogen storage capacity in structure sII.