Hydrodynamic studies in both bi-dimensional and three-dimensional bubble columns with a single sparger
Gas holdup in highly viscous fluid in two-phase bubble column with a single sparger operated continuously with respect to the gas flow and batch wise with respect to the liquid was investigated using bed expansion technique. Two- and three-dimensional columns of the same effective cross-sectional ar...
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Published in | Chemical engineering and processing Vol. 42; no. 5; pp. 403 - 408 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
2003
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Gas holdup in highly viscous fluid in two-phase bubble column with a single sparger operated continuously with respect to the gas flow and batch wise with respect to the liquid was investigated using bed expansion technique. Two- and three-dimensional columns of the same effective cross-sectional area were investigated. Liquid viscosity varied between 0.063 and 0.320 Pa s, static bed heights between 0.12 and 0.60 m, surface tension between 0.0248 and 0.035 N m
−1 and density between 906 and 928 kg m
−3. Columns were injected with air at superficial gas velocities between 0.0018 and 0.290 m s
−1. A single nozzle sparger of 0.01 m diameter was used. The behavior of bubbles in two-dimensional bubble column was found to fall into the bubble flow regime, whereas the behavior in three-dimensional column was found to fall into the churn turbulent regime. Two correlations for gas holdup in the two- and three-dimensional bubble columns were proposed and compared with correlations listed in the literature. |
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ISSN: | 0255-2701 1873-3204 |
DOI: | 10.1016/S0255-2701(02)00061-2 |