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A review of prospects and challenges of photocatalytic decomposition of volatile organic compounds (VOCs) under humid environment |
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| Authors: | Girma Masresha S Anuradha Jabasingh Shimelis Kebede David Doo-Arhin Mekdim Assefa |
| Affiliation: | 1. Process Engineering, School of Chemical and Bio-Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia;2. Process Engineering, School of Chemical and Bio-Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia
Contribution: Conceptualization, Supervision, Writing - review & editing;3. Environmental Engineering, School of Chemical and Bio-Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia Contribution: Conceptualization, Supervision, Writing - review & editing;4. Department of Materials Science and Engineering, School of Engineering Sciences, University of Ghana, Legon-Accra, Ghana Contribution: Conceptualization, Supervision;5. Process Engineering, School of Chemical and Bio-Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia Contribution: Conceptualization, Writing - original draft, Writing - review & editing |
| Abstract: | Volatile organic compounds (VOCs) are harmful for humans and the surrounding ecosystem. Emissions from these pollutants have caused a significant reduction in air quality, which has an effect on people's health. Alkanes, alkenes, alcohols, aromatics, and other VOC pollutants have all been broken down by TiO2 photocatalytic processes. Due to several operating inefficiencies and deactivation issues in humid environments, the practical application of photocatalysis has not been realized on a broader scale. The effectiveness of photo-oxidation of VOCs is impacted by a variety of environmental conditions. In the photocatalytic oxidation of the VOCs, relative humidity (RH) is critical. Therefore, it is important to review the recent findings on how humidity affects the photocatalytic breakdown of VOCs in air. To satisfy this need, this work provides a critical review of the related literature with focus on the fundamentals of photocatalysis, photocatalytic degradation of air pollutants, and the influence of humidity on the photocatalytic process degradation for selected air pollutants. It also highlights the kinetic models and typical photocatalytic reactor and supports for VOC removal. |
| Keywords: | air quality photocatalysis pollutants titanium dioxide volatile organic compounds |