Transport phenomena in bubble colunm reactor II: Pressure drop

Gharat, S. D. ; Joshi, J. B. (1992) Transport phenomena in bubble colunm reactor II: Pressure drop The Chemical Engineering Journal, 48 (3). pp. 153-166. ISSN 0300-9467

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

Related URL: http://dx.doi.org/10.1016/0300-9467(92)80031-5

Abstract

The two-phase frictional pressure drop was measured in a 0.15 m internal diameter bubble column operated in a continuous co-current manner. The fractional gas hold-up was measured using the gamma-ray absorption technique and the pressure drop using modified differential manometry. The superficial gas and liquid velocities were varied in the ranges 0.127-0.451 m s−1 and 0.047-0.236 m s−1 respectively. The effects of liquid viscosity, non-Newtonian behaviour, and the presence of electrolyte were investigated. A coherent model was developed to predict the pressure drop in homogeneous (bubbly flow) and heterogeneous (churn-turbulent) regimes. For this purpose, knowledge of the liquid phase flow pattern was used. A comparison between model predictions and experimental observations is presented. On the basis of the pressure drop, a criterion was developed to predict the transition from the homogeneous to the heterogeneous regime. A favourable comparison is shown between model predictions and experimental observations.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:61052
Deposited On:13 Sep 2011 10:54
Last Modified:13 Sep 2011 10:54

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