Photodegradation of Gaseous Toluene by Vacuum Ultraviolet Light: Performance and Mechanism
Hao Yuan, He Peng, Jie Guan, Yong Liu, Jue Dai, Ruijing Su, Zhanhu Guo, Yun Chen, Qian Hu, Bingnan Yuan, Hongcheng Wu, Dan Kilula and Ilwoo Seok
1 School of Environmental and Materials Engineering, Shanghai Second Polytechnic University, Shanghai, 201209, China
2 Research Center of Resource Recycling Science and Engineering, School of Environmental and Materials Engineering, Shanghai Second Polytechnic University, Shanghai, 201209, China
3 Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA
4 College of Engineering and Computer Sciences, Arkansas State University, Jonesboro, AR, 72467, USA
Abstract
The degradation of volatile organic compounds using short wavelengths of ultraviolet is attractive to reduce chemical pollutants. This research focuses on the the photo-degradation of toluene, one of common volatile organic compounds that widely distributed in the environment, by experimental process using the irradiation of vacuum ultraviolet light. The performance and mechanism of the degradation process were systematically evaluated by changing core factors in experimental conditions: residence time, initial concentration, relative humidity, and degradation intermediates. Major finding was that the photo-degradation rate of toluene is inversely proportional to the concentration of toluene, on the other hand, proportional to the light intensity and relative humidity. This study also investigated the bond-dissociation energy of toluene under 185nm wavelength of irradiation and its molar absorption coefficients. Finally, the pathway for photodegradation of toluene was developed with a diagram of the chemical flow. The results are useful toward the air pollution research and its management applications.
Publication details
Received: 02 Feb 2020
Revised: 16 Feb 2020
Accepted: 17 Feb 2020
Published online: 22 Feb 2020
Article type:
Research Paper
DOI:
10.30919/es8d910
Volume:
9
Page:
68-76
Citation:
Engineered Science, 2020, 9, 68-76
Permissions:
Copyright
Number of downloads:
7065
Citation Information:
17
Description:
The role of UV light on the decomposites of toluene was investigated and the intermediates were anal....
The role of UV light on the decomposites of toluene was investigated and the intermediates were analyszed to discloe the decomposition mechanism.
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