Abstract
In order to realize of CO_2 ocean sequestration, it is important to reveal the knowledge of CO_2 hydrate film thickness which forms on the interface between liquid CO_2 and sea water. However, knowledge of CO_2 hydrate film thickness under various parameter conditions such as temperature, pressure, convective motion of surrounding fluid, and elapsed time from hydrate formation is little. The objective of the present study is to investigate the influence of the elapsed time from CO_2 hydrate formation on the CO_2 hydrate film thickness. In this study, CO_2 hydrate film thickness is measured with laser interference method in time series. As the result, CO_2 hydrate film thickness of about 21μm was kept at 7.0〜9.6℃ and 6MPa during 3 hours.
