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Hydrodynamic Insights on Floating Bubbling Fluidized Beds: Dynamic Solutions for Mitigating Gas Maldistribution

Author

Listed:
  • Ali Akbar Sarbanha

    (Department of Chemical Engineering, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada)

  • Faïçal Larachi

    (Department of Chemical Engineering, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada)

  • Seyed Mohammad Taghavi

    (Department of Chemical Engineering, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada)

Abstract

This study examined bubbling fluidized beds as an alternative to fixed-bed dry scrubbers on ships for reducing pollutants from marine fuels. It focused on overcoming the challenges of gas maldistribution/slug formation, especially under rough sea conditions. This research departed from traditional methods by introducing mobile internal elements into the bed emulsion phase and investigating their effectiveness in various settings, such as vertical, inclined, and rolling beds. A specialized hexapod-driven bubbling fluidized bed was developed to mimic marine operating conditions and to study the behavior of shipboard fluidized beds. Techniques such as digital image analysis (DIA) and particle image velocimetry (PIV) were used to observe bubble dynamics and granular phases, measuring local void fractions and particle velocities. A key finding is the effectiveness of moving internals in preventing bubble coalescence, which is critical for avoiding wall slugs, at different inclinations. Three types of packing were used as mobile internals: Super Raschig, Pall, and square rings. Super Raschig rings, which are characterized by high porosity, were the most efficient in reducing bubble coalescence, making them a preferred choice for offshore fluidized bed applications. This research contributes to the advancement of fluidized bed technology in marine applications and provides insight for future improvements.

Suggested Citation

  • Ali Akbar Sarbanha & Faïçal Larachi & Seyed Mohammad Taghavi, 2024. "Hydrodynamic Insights on Floating Bubbling Fluidized Beds: Dynamic Solutions for Mitigating Gas Maldistribution," Energies, MDPI, vol. 17(3), pages 1-17, January.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:3:p:672-:d:1330153
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    References listed on IDEAS

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    1. Liang, Jyun-De & Hsu, Chien-Yeh & Hung, Tai-Chih & Chiang, Yuan-Ching & Chen, Sih-Li, 2018. "Geometrical parameters analysis of improved circulating inclined fluidized beds for general HVAC duct systems," Applied Energy, Elsevier, vol. 230(C), pages 784-793.
    2. Chiang, Yuan-Ching & Chen, Chih-Hao & Chiang, Yi-Chin & Chen, Sih-Li, 2016. "Circulating inclined fluidized beds with application for desiccant dehumidification systems," Applied Energy, Elsevier, vol. 175(C), pages 199-211.
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