Disengagement of the gas phase in bubble columns

Deshpande, N. S. ; Dinkar, M. ; Joshi, J. B. (1995) Disengagement of the gas phase in bubble columns International Journal of Multiphase Flow, 21 (6). pp. 1191-1201. ISSN 0301-9322

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0301-9322(95)00033-T


The technique of gas disengagement is popularly used to assess the bubble size distribution in bubble columns. The technique involves the dynamic measurement of dispersion height when the gas supply is stopped. In this paper a mathematical model has been proposed for the process of dynamic gas disengagement. It has been shown that the initial faster disengagement is due to the presence of internal liquid circulation and not due to the presence of very large bubbles. Further, slower disengagement has been attributed to the transition from heterogeneous dispersion to homogeneous dispersion. The new model also explains the effects of superficial gas velocity, column diameter, column height and liquid phase physical properties on the gas disengagement.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Dynamic Gas Disengagement; Bubble Columns; Two Bubble Class Model; Bubble Rise Velocity; Liquid Circulation Velocity
ID Code:61131
Deposited On:13 Sep 2011 10:56
Last Modified:13 Sep 2011 10:56

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