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Characterization and optimization of an oscillatory baffled reactor (OBR) for ozone-water mass transfer

Lookup NU author(s): Abdullah Al-Abduly, Professor Paul ChristensenORCiD, Professor Adam Harvey, Dr Kui Zhang

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Abstract

Ozone-water mass transfer was investigated using an oscillatory baffled reactor (OBR) operated as a semi-batch and as a co-current up flow continuous reactor. The effects of input ozone concentration, input gas and water flow rates, and oscillation conditions on gas hold up, volumetric mass transfer coefficient and mass transfer efficiency were determined. The same reactor was operated as a baffled column (without oscillation) and as a bubble column to assess the effect of the reactor arrangement on the mass transfer. The results show that the OBR was 5 and 3 times more efficient for ozone-water mass transfer than the baffled and bubble columns, respectively. The enhancement obtained with OBR over the baffled column reactor was found to decrease with gas flow rate due to changes in bubble flow pattern from homogenous to heterogeneous. Under continuous flow conditions, the performance of the baffled reactor and the OBR were found to be twice efficient for ozone-water mass transfer than when operating under semi-batch conditions. The mass transfer effeciency (MTE) was found to increase from 57% using the baffled reactor to 92% with OBR under continuous flow at water and gas superficial velocities of 0.3 and 3.4 cm s(-1), respectively. (C) 2014 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Al-Abduly A, Christensen P, Harvey A, Zahng K

Publication type: Article

Publication status: Published

Journal: Chemical Engineering and Processing: Process Intensification

Year: 2014

Volume: 84

Pages: 82-89

Print publication date: 01/10/2014

Online publication date: 08/04/2014

Acceptance date: 31/03/2014

Date deposited: 09/02/2016

ISSN (print): 0255-2701

ISSN (electronic): 1873-3204

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.cep.2014.03.015

DOI: 10.1016/j.cep.2014.03.015

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