海水および堆積物間隙水中のメタンハイドレートの相平衡条件の統計熱力学的推定

概要

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Equilibrium conditions of methane hydrate in saline waters such as seawater and pore waters were predicted by statistical thermodynamic method based on the clathrate model proposed by van der Waals and Platteeuw (1959). In this study, equilibrium conditions of methane hydrate in saline waters were calculated by thermodynamic parameters proposed by Avlonitis (1994), with the evaluation of water activity by Englezos and Bishnoi (1988). It is found that equilibrium conditions of methane hydrate in saline waters predicted by this study are in good agreement with those determined by laboratory experiments. The present results indicate that the predicted equilibrium temperatures of methane hydrates in seawater and pore waters are about 1.2℃ lower than that in pure water.
日本地球化学会の論文
2000-12-18