Density Change of CO_2-Dissolved Water in Hydrate Forming Region

摘要

The density changes of CO_2 dissolved seawater in hydrate forming region, which determines the diffusion process of dissolved CO_2 around storage site, is one of the properties that influence on the ecosystems. In order to obtain density changes, the authors attempt directly to measure the density of CO_2 dissolved water by using a high-pressure loop that can simulate the pressure up to 3000 meters depth (30 MPa). As a result, the density increase of CO_2 dissolved water was obtained as 2.99, 2.55 and 2.84 kg/m~3/wt% for 5, 12 and 20 Celsius, respectively.