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Dissolution Process Observation of Methane Bubbles in the Deep Ocean Simulator Facility

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Title: Dissolution Process Observation of Methane Bubbles in the Deep Ocean Simulator Facility
Authors: Uchida, Tsutomu Browse this author →KAKEN DB
Nagamine, Ike Browse this author
Yabe, Itsuka Browse this author
Fukumaki, Tatsunori Browse this author
Oyama, Ai Browse this author
Yoza, Brandon Browse this author
Tenma, Norio Browse this author
Masutani, Stephen M. Browse this author
Keywords: bubble dissolution
non-hydrate condition
temperature dependence
salinity
Issue Date: Aug-2020
Publisher: MDPI
Journal Title: Energies
Volume: 13
Issue: 15
Start Page: 3938
Publisher DOI: 10.3390/en13153938
Abstract: To investigate the temperature dependency of the methane bubble dissolution rate, buoyant single methane bubbles were held stationary in a countercurrent water flow at a pressure of 6.9 MPa and temperatures ranging from 288 K to 303 K. The 1 to 3 mm diameter bubbles were analyzed by observation through the pressure chamber viewport using a bi-telecentric CCD camera. The dissolution rate in artificial seawater was approximately two times smaller than that in pure water. Furthermore, it was observed that the methane bubble dissolution rate increased with temperature, suggesting that bubble dissolution is a thermal activation process (the activation energy is estimated to be 9.0 kJ/mol). The results were different from the expected values calculated using the governing equation for methane dissolution in water. The dissolution modeling of methane bubbles in the mid-to-shallow depth of seawater was revised based on the current results.
Rights: © [2020] by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
http://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/79243
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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