CO₂ハイドレート膜厚に及ぼす周囲流速の影響

抄録

In order to realize CO₂ ocean sequestration, it is important to reveal the knowledge of CO₂ hydrate film thickness which forms on the interface between CO₂ and water. However, knowledge of CO₂ hydrate film thickness under various parameter conditions such as temperature, surrounding fluid velocity on the film, and elapsed time from hydrate formation is little. The objective of the present study is to investigate the influence of elapsed time from CO₂ hydrate formation. CO₂ hydrate film thickness is measured under differential fluid velocity conditions by laser interference method in time series. And CO₂ hydrate film thickness is estimated based on hydrate film formation and decomposition model. As the result, the measured CO₂ hydrate film thickness increase under no fluid velocity condition in time series and CO₂ hydrate film thickness is maintained constant under fluid velocity condition in time series. The estimated CO₂ hydrate film thickness show the same tendency of measured CO₂ hydrate film thickness.