CO2 clathrate formation and its properties in a simulated deep ocean

Abstract The following two topics were examined: 1. 1)The conduciveness of conditions for the formation of CO 2 clathrate hydrate at ocean depths of 700m and 1,000m with assumption of corresponding depth-temperature profile of the ocean near Japan. 2. 2)The effect of liquid CO 2 on an ocean environment at a depth of 3,000m in ambient sea water. Test results concluded that: • ∗ While the CO 2 clathrate hydrate would form easily at the depths of 700m and 1,000m in the Tsushima ocean current and Oyashio region, it would be difficult in the Kuroshio region due to a slightly higher water temperature. • ∗ The amount of CO 2 dissolved into sea water at a depth of 3,000m is proportional to its velocity of injection. • ∗ The conditions required for the formation of CO 2 clathrate hydrate were clarified.