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Mass transfer studies in shallow bubble column reactors

Lau, R, Lee, PHV and Chen, T (2012) Mass transfer studies in shallow bubble column reactors Chemical Engineering and Processing: Process Intensification, 62. pp. 18-25.

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Mass transfer studies are carried out in a bubble column with an internal diameter of 14. cm and various static liquid heights. The mass transfer coefficient is evaluated by using an oxygen sorption method. A model considering the gas holdup flushing and the sensor response is used. The interfacial mass transfer area is determined according to the measured bubble size distribution. The liquid-side mass transfer coefficient is also estimated from the volumetric mass transfer coefficient and the interfacial mass transfer area found. Results show that the effect of static liquid height on gas-liquid mass transfer is primarily on the interfacial mass transfer area. The mass transfer process is also governed by the type of gas distributor used. A single nozzle distributor is not suitable for shallow bubble column operations due to the large initial bubbles and the large volume of dead zone generated. It is also found that the different dependence of the liquid-side mass transfer coefficient on the superficial gas velocity observed in the literatures is due to the different bubble rising regimes. © 2012 Elsevier B.V.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Date : December 2012
Identification Number : 10.1016/j.cep.2012.10.003
Additional Information : NOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering and Processing: Process Intensification. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering and Processing: Process Intensification, 62, December 2012, DOI 10.1016/j.cep.2012.10.003.
Depositing User : Symplectic Elements
Date Deposited : 14 May 2013 18:12
Last Modified : 23 Sep 2013 20:07

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