Gas Holdup in Bubble Columns at Elevated Pressure Via Computed Tomography
Gas Holdup in a Pressurized Bubble Column (Pressure from 0.1 to 0.7 MPa) Was Studied in a Laboratory Scale Vessel (Diameter 0.162m) with Air-Water System over a Range of Superficial Gas Velocities (0.02-0.18 M/s) using Non-Invasive Γ-Ray based Computed Tomography (CT). It Was Found that the Cross-Sectional Average Gas Holdup Increases with Pressure, as Well as with Superficial Gas Velocity. at All Operating Conditions, the Azimuthally Averaged Radial Gas Holdup Profiles Exhibit a Characteristic Shape with Greater Gas Holdup in the Column Center Than by the Walls. It is Also Observed that with an Increase in Pressure, the Transition to Churn-Turbulent Regime Characterized by the Change of the Radial Gas Holdup Profile from Relatively Flat to Almost Parabolic, is Delayed to Higher Superficial Gas Velocities. the Average Cross-Sectional Gas Holdup at Each Operating Condition Was Compared with Predictions of Existing Correlations and Large Discrepancies in Predictions (As High as 300%) Were Found. © 2001 Elsevier Science Ltd. All Rights Reserved.
A. Kemoun et al., "Gas Holdup in Bubble Columns at Elevated Pressure Via Computed Tomography," International Journal of Multiphase Flow, vol. 27, no. 5, pp. 929 - 946, Elsevier, May 2001.
The definitive version is available at https://doi.org/10.1016/S0301-9322(00)00037-9
Chemical and Biochemical Engineering
Keywords and Phrases
Bubble column; Computed tomography; Gas-liquid flow; High pressure; Superficial gas velocity
International Standard Serial Number (ISSN)
Article - Journal
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01 May 2001