Improving Mass Transfer Coefficient Prediction in Bubbling Columns via Sphericity Measurements

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• 作者：J. Enrique Botello-&Aacute ; lvarez ; J. Luis Navarrete-Bolañ ; os ; Hugo Jimé ; nez-Islas ; Alejandro Estrada-Baltazar ; and Ramiro Rico-Martí ; nez
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2004
• 出版时间：September 29, 2004
• 年：2004
• 卷：43
• 期：20
• 页码：6527 - 6533
• 全文大小：137K
• 年卷期：v.43,no.20(September 29, 2004)
• ISSN：1520-5045

文摘

The prediction of the oxygen transfer coefficients (k_L) in bubbling columns is studied. Bubblingcolumns have important applications as bioreactors. It is found that the coefficient is stronglyinfluenced by the motion and geometric characteristics of the bubbles. In the experiments, it isobserved that the maximum transfer coefficient is achieved when a measure of the bubblesphericity reaches a minimum and the slip velocity a maximum. The introduction of characteristicparameters to account for the bubble deformation is proposed. Their use greatly improves theprediction of the oxygen transfer coefficient using standard correlations.