Mass transfer studies in shallow bubble column reactors

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 m...

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Main Authors: Lau, Raymond, Lee, Pei Hui Venus, Chen, Tao
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/99520
http://hdl.handle.net/10220/12853
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-995202020-03-07T11:35:39Z Mass transfer studies in shallow bubble column reactors Lau, Raymond Lee, Pei Hui Venus Chen, Tao School of Chemical and Biomedical Engineering 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. 2013-08-02T03:31:39Z 2019-12-06T20:08:19Z 2013-08-02T03:31:39Z 2019-12-06T20:08:19Z 2012 2012 Journal Article Lau, R., Lee, P. H. V.,& Chen, T. (2012). Mass transfer studies in shallow bubble column reactors. Chemical Engineering and Processing: Process Intensification, 62, 18-25. 0255-2701 https://hdl.handle.net/10356/99520 http://hdl.handle.net/10220/12853 10.1016/j.cep.2012.10.003 en Chemical engineering and processing : process intensification
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description 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.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Lau, Raymond
Lee, Pei Hui Venus
Chen, Tao
format Article
author Lau, Raymond
Lee, Pei Hui Venus
Chen, Tao
spellingShingle Lau, Raymond
Lee, Pei Hui Venus
Chen, Tao
Mass transfer studies in shallow bubble column reactors
author_sort Lau, Raymond
title Mass transfer studies in shallow bubble column reactors
title_short Mass transfer studies in shallow bubble column reactors
title_full Mass transfer studies in shallow bubble column reactors
title_fullStr Mass transfer studies in shallow bubble column reactors
title_full_unstemmed Mass transfer studies in shallow bubble column reactors
title_sort mass transfer studies in shallow bubble column reactors
publishDate 2013
url https://hdl.handle.net/10356/99520
http://hdl.handle.net/10220/12853
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