Photocatalytic Degradation of Toluene in Air Using a Fluidized Bed Photoreactor

Prieto, O.; Fermoso, J.; Irusta, R.

doi:https://doi.org/10.1155/2007/32859

International Journal of Photoenergy

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Research Article | Open Access

Volume 2007 | Article ID 032859 | https://doi.org/10.1155/2007/32859

Photocatalytic Degradation of Toluene in Air Using a Fluidized Bed Photoreactor

O. Prieto,¹J. Fermoso,¹and R. Irusta^1,2

Academic Editor: Sabry Abdel-Mottaleb

Received16 Feb 2006

Revised09 Jan 2007

Accepted09 Jan 2007

Published21 Feb 2007

Abstract

The photocatalytic degradation of toluene in air was carried out on particles of TiO2 in a photocatalytic reactor that had been developed to study the treatment of organic pollutants in a gaseous phase. Hypothetically, the fluidized bed technology of this reactor could make it possible to increase the mass transfer coefficients in comparison with those of conventional photoreactors. The photocatalytic particles used were prepared by mixing TiO2 (Degussa P25) and starch in a methanol solution. The XRD and SEM results of these aggregates confirm the titanium dioxide (Degussa P25) characteristics, such as the presence of anatase on the particle surface and spongy and wrinkled morphology. Toluene concentrations varied from 0.9 to 199 ppmv, and all the experiments were carried out with a flow rate of 300 NL/h. Toluene conversions from 77% to 100% were obtained in the range studied. In this work, the regeneration processes of deactivated TiO2 photocatalysts have been investigated using FT-IR and GC/MS techniques. Benzoic acid, benzaldehyde, and benzyl alcohol were the three major intermediate products identified.

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Copyright © 2007 O. Prieto et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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