Department of Process Engineering, School of Chemical Engineering, University of Campinas, Av. Albert Einstein, 500, Campinas, SP, CEP 13083-852, Brazil.
Environ Sci Pollut Res Int. 2021 May;28(19):24216-24223. doi: 10.1007/s11356-021-13574-6. Epub 2021 Mar 22.
Volatile organic compounds (VOCs) are atmospheric pollutants that can affect human healthy and intensify some environmental problems. Among different techniques to degrade VOCs, heterogeneous photocatalysis has been highlighted. The aim of this research was to obtain high toluene degradation using heterogeneous photocatalysis in the ozone presence (TiO/O/UV) and analyze VOC degradation over the reactor length comparing with ozone concentration also over the reactor length. Ozone concentration has influence on toluene degradation; 75% of VOC degradation was reached with 69.0 mgL of O meanwhile a degradation of 91% was obtained with 96.2 mgL of O. Toluene degradation reached a plateau over reactor length at flowrate of 565 mL min, which indicates the reactor was oversized in this case. However, it was not observed at 1425 mL min. In addition, it was evaluated that O concentration and toluene reaction rate decreased over the reactor length.
挥发性有机化合物（VOCs）是一种大气污染物，会影响人类健康并加剧一些环境问题。在降解 VOCs 的不同技术中，多相光催化技术备受关注。本研究的目的是在臭氧存在下（TiO/O/UV）通过多相光催化获得高浓度的甲苯降解，并分析随着反应器长度的变化，VOC 降解与臭氧浓度的变化关系。臭氧浓度对甲苯降解有影响；当臭氧浓度为 69.0mg/L 时，75%的 VOC 被降解，当臭氧浓度为 96.2mg/L 时，91%的 VOC 被降解。在 565mL/min 的流速下，甲苯在反应器长度上达到降解平台，这表明在这种情况下，反应器过大。然而，在 1425mL/min 的流速下并未观察到这种情况。此外，还评估了随着反应器长度的增加，O 浓度和甲苯的反应速率降低。
