多孔質中における液体CO2の流動挙動に及ぼすハイドレートの影響

概要

論文の詳細を見る
In the sea around Japan, there is the region of sufficient environment of CO2 hydrate generation. When liquid CO2 is injected in those regions, choking of liquid CO2 flow is expected to occur due to CO2 hydrate generation in pipe arrangement or seabed. The purpose of the present study is to evaluate the influence of CO2 hydrate on the flow of liquid CO2 when liquid CO2 injected in a porous media as simulating seabed. In order to reveal the influence of CO2 hydrate, differential pressure is measured under both condition of CO2 hydrate generated and not generated. As the results, in the case of the hydrate generation environment, it is identified that differential pressure became large compared with the case of no-hydrate generation. In the upstream part, the differential pressure became large compared with the downstream region. It is suggested that flow resistance occurred due to choking of CO2 hydrate membrane on the porous media. Friction factor is also compared with the Erguns equation which is proposed for single-phase flow in a porous media. The measured friction factor is larger than the value from Erguns equation.