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Environmental Science and Pollution Research

, Volume 26, Issue 5, pp 4234–4241 | Cite as

Photodegradation of cyclohexane and toluene using TiO2/UV/O3 in gas phase

  • Luís Antonio MarchioriEmail author
  • Úrsula Luana Rochetto Doubek
  • Bárbara Maria Borges Ribeiro
  • Tânia Miyoko Fujimoto
  • Edson TomazEmail author
Advanced Oxidation Technologies: State-of-the-Art in Ibero-American Countries
  • 98 Downloads

Abstract

Volatile organic compounds (VOC) are air pollutants usually found in urban and industrial areas. Heterogeneous photocatalysis is an interesting technique used to degrade these compounds. Several approaches may enhance this process; some studies have shown higher VOC conversions by adding ozone to the experimental system, once ozone increases the number of reactive radicals in the reaction. In this context, this work studied the conversion of cyclohexane and toluene by heterogeneous photocatalysis in gas phase, in the presence of titanium dioxide (TiO2), UV light, and different concentrations of ozone. For fixed space times from 13.1 to 48.8 s, an average increase of 9% was reached in cyclohexane conversion when comparing the system with maximum concentration of ozone (0.8%) and the system without it. In addition, difference of less than 2% in the conversion of cyclohexane with different moisture fractions was observed. Toluene photodegradation was also analyzed in the presence of ozone and although the conversion was only about 40% for the space time of 25 s, this result was maintained during 4 h of experiment, with no catalyst deactivation as usually reported in the literature for aromatic compounds. Based on the results, ozone addition is an advantageous technique to improve the photodegradation of VOC.

Keywords

Heterogeneous photocatalysis VOC degradation Cyclohexane Toluene Ozone TiO2/UV 

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Luís Antonio Marchiori
    • 1
    Email author
  • Úrsula Luana Rochetto Doubek
    • 1
  • Bárbara Maria Borges Ribeiro
    • 1
  • Tânia Miyoko Fujimoto
    • 1
  • Edson Tomaz
    • 1
    Email author
  1. 1.School of Chemical EngineeringUNICAMP - University of CampinasCampinasBrazil

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