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

Author

Listed:
  • Tsutomu Uchida

    (Division of Applied Physics, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
    Research Institute of Energy Frontier, Department of Energy and Environment, AIST, Tsukuba 305-8569, Japan)

  • Ike Nagamine

    (Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI 96822, USA)

  • Itsuka Yabe

    (Japan NUS Co., Ltd., Tokyo 160-0023, Japan
    Department of Physical Oceanography, Atmosphere and Ocean Research Institute, the University of Tokyo, Kashiwa 277-8564, Japan)

  • Tatsunori Fukumaki

    (Japan NUS Co., Ltd., Tokyo 160-0023, Japan)

  • Ai Oyama

    (Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI 96822, USA)

  • Brandon Yoza

    (Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI 96822, USA)

  • Norio Tenma

    (Research Institute of Energy Frontier, Department of Energy and Environment, AIST, Tsukuba 305-8569, Japan)

  • Stephen M. Masutani

    (Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI 96822, USA)

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.

Suggested Citation

  • Tsutomu Uchida & Ike Nagamine & Itsuka Yabe & Tatsunori Fukumaki & Ai Oyama & Brandon Yoza & Norio Tenma & Stephen M. Masutani, 2020. "Dissolution Process Observation of Methane Bubbles in the Deep Ocean Simulator Facility," Energies, MDPI, vol. 13(15), pages 1-11, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3938-:d:393154
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