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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received March 30, 2015
Accepted April 17, 2015

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Characteristics of Gas-liquid Mass Transfer and Interfacial Area in a Bubble Column

Dae Ho Lim Dong Jun Yoo Yong Kang^†

Department of Chemical Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Korea

Korean Chemical Engineering Research, June 2015, 53(3), 315-320(6), 10.9713/kcer.2015.53.3.315 Epub 2 June 2015

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Abstract

Characteristics of gas-liquid mass transfer and interfacial area were investigated in a bubble column of diameter and height of 0.102 m and 2.5 m, respectively. Effects of gas and liquid velocities on the volumetric gas-liquid mass transfer coefficient (kLa), interfacial area (a) and liquid side true mass transfer coefficient (kL) were examined. The interfacial area and volumetric gas-liquid mass transfer coefficient were determined directly by adopting the simultaneous physical desorption of O2 and chemical absorption of CO2 in the column. The values of kLa and a increased with increasing gas velocity but decreased with increasing liquid velocity in the bubble column which was operated in the churn turbulent flow regime. The value of kL increased with increasing gas velocity but did not change considerably with increasing liquid velocity. The liquid side mass transfer was found to be related closely to the liquid circulation as well as the effective contacting frequency between the bubbles and liquid phases.

Keywords

Bubble Column Volume Mass Transfer Coefficient Interfacial Area Liquid Side Mass Transfer Coefficient Liquid Circulation

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