Journal of MMIJ
Online ISSN : 1884-0450
Print ISSN : 1881-6118
ISSN-L : 1881-6118
Original Paper - [Special Edition] Special Edition for Recent Research Trends on CO2 Geological Storage -
A Unique Dissolution Behavior of Trapped CO2 into Flowing Water Inside a Porous Medium Compared with Other Gases
Anindityo PATMONOAJIMuhammad NASIRMohammad Azis MAHARDIKAYun SHETetsuya SUEKANE
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JOURNAL OPEN ACCESS

2021 Volume 137 Issue 9 Pages 91-97

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Abstract

Dissolution of gas into flowing water inside a porous medium is important in various hydrogeology processes, such as geological carbon sequestration (GCS). The dissolution rate of CO2 controls the amount of CO2 injection and the safety of the GCS process. In this report, we investigated the dissolution behavior of four gas species, i.e., CO2, O2, N2, and Ar, into flowing water inside a porous medium by using micro-tomography. The trapped gas characteristics can be observed, and thus interfacial area and mass transfer coefficient can be calculated. Compared with the other gases, we found that the dissolution behavior of CO2 gas is unique, and the mass transfer coefficient is one order of magnitude lower than other gases. We believe that the high dissolution ratio of CO2 gas could have generated a layer of the high solute region around the trapped CO2 gas, disrupting the mass transfer process.

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© 2021 The Mining and Materials Processing Institute of Japan

この記事はクリエイティブ・コモンズ [表示 - 非営利 - 改変禁止 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
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