%0 Journal Article %T Estimation of CO<sub>2</sub> Storage Capacity in the Real Sub-Seabed Sediments by Gas Hydrate %A Tao Yu %A Toru Sato %A Abuliti Abudula %J Journal of Flow Control, Measurement & Visualization %P 82-94 %@ 2329-3330 %D 2018 %I Scientific Research Publishing %R 10.4236/jfcmv.2018.62008 %X Beyond conventional methods for CO₂ capture and storage, a promising technology of sub-seabed CO₂ storage in the form of gas hydrate has come into the limelight nowadays. In order to estimate CO₂ storage capacity in the real sub-seabed sediments by gas hydrate, a large-scale geological model with the radius of 100 m and the thickness of 160 m was built in this study, and the processes of CO₂ injection and CO₂ hydrate formation in the sediments with two-phase flow were simulated numerically at three different injection rates of 10 ton/day, 50 ton/day, and 100 ton/day for an injection period of 150 days. Then, the evolutions of CO₂ reaction, free CO₂, and hydrate formation over time were analyzed quantitatively, and the spatial distributions of the physical properties in the sediments were presented to investigate the behaviors of CO₂ hydrate formation in the sediments with two-phase flow. For CO₂ storage capacity, a total amount of 15,000-ton CO₂ can be stored safely in the sediments at the injection rate of 100 ton/day for 150 days, and a maximum amount of 36,500-ton CO