2021 Fiscal Year Final Research Report
Development of a scienctific basis of CO2 geological storage with pore-scale measurement
| Project/Area Number |
17H00790
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental engineering and reduction of environmental burden
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2022-03-31
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| Keywords | 二酸化炭素地下貯留 / 多孔質 / 混相流 |
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| Outline of Final Research Achievements |
By visualizing the flow in porous media at the pore-scale, we have elucidated the trapping mechanism necessary for evaluating the safety of carbon dioxide capture and storage (CCS), and established scientific knowledge that contributes to fostering the social acceptance of CCS. Flow patterns in porous media were summarized as flow pattern diagrams for three-dimensional porous media. The effect of the initial interface thickness on the onset time of density driven natural convection was elucidated. This model contributes to estimate the time required for transition to a dissolution trapping. A simple percolation model was developed to estimate the saturation from the porous pore structure.
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| Free Research Field |
環境流体力学
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| Academic Significance and Societal Importance of the Research Achievements |
二酸化炭素(CO2)地下貯留技術(CCS)の安全性の評価に必要不可欠となる岩石多孔質内部でのCO2の移動・溶解・対流などのトラップメカニズムに関する物質移動現象を解明し，CCSの社会的受容性を醸成するのに資する科学的知見を確立した．CCSの長期安定性について釈迦にとコミュニケーションする上での基礎となる学術基盤が整備された．CO2は注入後，構造性トラップ，毛管圧トラップ，溶解トラップと移行するが，移行時間に要する時間を定量的に評価出るようになった．
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