主催: 一般社団法人 日本エネルギー学会
後援: 国立研究開発法人 新エネルギー・産業技術総合開発機構
会議名: 第24回日本エネルギー学会大会
開催地: 北海道 札幌コンベンションセンター
開催日: 2015/08/03 - 2015/08/04
In this study, the crystal structure of gas hydrates formed from methane-butane mixtures was characterized in order to clarify the relationship between its guest composition and hydrate crystal structure. ^<13>C NMR spectroscopic analyses revealed that the guest butane molecules preferentially occupy the large cages of structure II hydrate framework. The small cage occupancies of methane in the structure II hydrate lattice decreased with increasing butane concentration. The hydrate lattice parameters were determined by a powder X-ray diffraction (PXRD) technique. The PXRD patterns showed that the hydrate lattice tends to expand with increasing butane composition.
