| 초록 |
A recently reported clathrate hydrate of hydrogen, requiring only water and gas, indeed does meet the storage and cost requirements, however, the extreme pressures (~2kbar) required to produce the material make it impractical. While pure ethane is known to form structure I hydrate, pure hydrogen is known to from structure II hydrate. Recently tetrahydrofuran (THF) has been received growing attention as a novel promoter for hydrogen storage. However, THF is volatile organic solvent used in process as well as structure II hydrate former by itself with water. In this work, C2H6 was studied as a new promoter for hydrogen storage. Raman spectroscopy, 1H NMR, X-ray diffraction and direct measurements of gas content have shown that structure I gas hydrates, with the large cage occupied by C2H6 molecule, can form easily at ~100 bars and near- ambient temperatures in the small cavities. |
