Dreher, A. J. ; Krishna, R. (2001) Liquid-phase backmixing in bubble columns, structured by introduction of partition plates Catalysis Today, 69 (1-4). pp. 165-170. ISSN 0920-5861
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0920-5861(01)00365-0
Abstract
Installation of perforated sieve plates into a bubble column has the effect of introducing structure into an otherwise chaotic hydrodynamic behaviour. In this study, we focus on the reduction of backmixing of the liquid phase in compartmentalised bubble columns. Liquid-phase residence time distribution (RTD) measurements were carried out in bubble columns with diameters DT=0.10, 0.15 and 0.38 m with air-water system operating at superficial gas velocities of UG = 0.05-0.04m/s. Partition sieve plates with open areas of 18.6 and 30.7% were used in the studies. The measured data on RTD were interpreted in terms of an axial dispersion model extended to allow for liquid interchange between compartments. The interchange velocity was found to be strongly dependent on the free area of the plates but practically independent of the column diameter.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
Keywords: | Bubble Columns; Churn-turbulent Flow Regime; Partition; Backmixing; Liquid Exchange |
ID Code: | 65475 |
Deposited On: | 17 Oct 2011 03:13 |
Last Modified: | 17 Oct 2011 03:13 |
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