In most of the bubble column design, it is assumed that liquid phase is well mixed and spatial distributions of molar concentrations for all components are uniform. However, there is liquid mixing in actual bubble column reactors. The performance of a bubble column strongly depends on the liquid mixing induced by bubbles in the column. Those assumptions therefore cause some errors in column optimum design. Only a few quantitative investigations have been carried out on two-phase turbulence and liquid mixing. In this study, numerical simulations for liquid mixing in a bubble column have been carried out and compared with experiments. The transient behavior of tracer concentration was measured for test columns of 0.3 m in diameter. The height of the columns was 1 m. Bubbles were supplied by using two types of spargers: ring spargers and a perforated plate. A hybrid method, NP2-3D, which is based on the combination of multi-fluid and interface tracking methods, was used to simulate the flow. In a two-phase turbulence model, linear superposition of bubble-induced turbulence and shear-induced turbulence was assumed. Numerical prediction could qualitatively describe the effects of column diameter and gas inlet on the liquid mixing in a column.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Liquid Mixing in a Bubble Column
Naoki Shimada,
Naoki Shimada
Sumitomo Chemical Co. Ltd., Niihana, Ehime, Japan
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Rina Saiki,
Rina Saiki
Sumitomo Chemical Co. Ltd., Niihana, Ehime, Japan
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Abhinav Dhar,
Abhinav Dhar
Sumitomo Chemical Co. Ltd., Niihana, Ehime, Japan
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Akio Tomiyama
Akio Tomiyama
Kobe University, Nada, Kobe, Japan
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Naoki Shimada
Sumitomo Chemical Co. Ltd., Niihana, Ehime, Japan
Rina Saiki
Sumitomo Chemical Co. Ltd., Niihana, Ehime, Japan
Abhinav Dhar
Sumitomo Chemical Co. Ltd., Niihana, Ehime, Japan
Akio Tomiyama
Kobe University, Nada, Kobe, Japan
Paper No:
AJK2011-04006, pp. 1585-1592; 8 pages
Published Online:
May 25, 2012
Citation
Shimada, N, Saiki, R, Dhar, A, & Tomiyama, A. "Liquid Mixing in a Bubble Column." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 1585-1592. ASME. https://doi.org/10.1115/AJK2011-04006
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