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A photocatalytic impeller reactor for gas phase heterogeneous photocatalysis.

Tokode, Oluwatosin; Prabhu, Radhakrishna; Lawton, Linda A.; Robertson, Peter K.J.

Authors

Oluwatosin Tokode

Peter K.J. Robertson



Abstract

A novel photocatalytic reactor based on a stirred tank configuration has been described. This reactor employs the use of photocatalytic impellers to aid the mass transport of gaseous organic compounds during photocatalytic reactions. Experiments involving toluene vapour photo-oxidation showed the reactor configuration is susceptible to catalyst deactivation even at low concentrations if treated for prolonged periods. For this reactor, the reactive time scale exceeds the diffusive time scale hence, toluene photo-oxidation was reaction limited. The dependency of photonic efficiency of the reaction on mass transfer and catalyst deactivation was observed when correlated with the Damköhler number and deactivation induced reduction reaction rates respectively. The results show an inverse variation with Damköhler number and proportionality to reaction rates.

Citation

TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2017. A photocatalytic impeller reactor for gas phase heterogeneous photocatalysis. Journal of environmental chemical engineering [online], 5(4), pages 3942-3948. Available from: https://doi.org/10.1016/j.jece.2017.07.068

Journal Article Type Article
Acceptance Date Jul 27, 2017
Online Publication Date Jul 29, 2017
Publication Date Aug 31, 2017
Deposit Date Aug 17, 2017
Publicly Available Date Jul 30, 2018
Journal Journal of environmental chemical engineering
Print ISSN 2213-3437
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 5
Issue 4
Pages 3942-3948
DOI https://doi.org/10.1016/j.jece.2017.07.068
Keywords Titanium dioxide; Thin film; Reactor engineering; Photocatalysis; Catalyst deactivation
Public URL http://hdl.handle.net/10059/2451

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