title: Chlorobenzene degeradation by non-thermal plasma combined with EG-TiO2/ZnO as a photocatalyst: Effect of photocatalyst on CO2selectivity and byproducts reduction.
abstract: The non-thermal plasma (NTP) technique, which suffers from low selectivity in complete oxidation of volatile organic compounds to CO2and H2O, creates unwanted and harmful byproducts. NTP in concert with photocatalyst can resolve this limitation due to additional oxidation. TiO2and ZnO nanoparticles were coated on the surface of the expanded graphite and placed downstream of the NTP reactor under UV light. In this study, to compare the performance of NTP and the combined system, chlorobenzene removal, selectivity of CO2and byproducts formation were investigated. The results showed that the combined system enhanced both the removal efficiency and CO2selectivity. The output gas of the NTP reactor contained chlorobenzene, phosgene, O3, NO, NO2, CO, CO2, HCL and CL. The bulk of these byproducts was oxidized on the surface of the nanocomposite; as a result, the content of the byproducts in the output gas of the combined system decreased dramatically. The removal efficiency and CO2selectivity increased by rising the applied voltage and residence time because the collision between active species and pollutant molecules increases. Based on these results, the combined system is preferred due to a higher performance and lower formation of harmful byproducts.
authors.affiliation: Center of Excellence for Occupational Health and Research Center for Health Science, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Farshid
authors.initials: F
authors.lastname: Ghorbani Shahna
authors.affiliation: Center of Excellence for Occupational Health and Research Center for Health Science, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Abdulrahman
authors.initials: A
authors.lastname: Bahrami
authors.affiliation: Department of Occupational Health, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Iraj
authors.initials: I
authors.lastname: Alimohammadi
authors.affiliation: Department of Occupational Health, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Rassuol
authors.initials: R
authors.lastname: Yarahmadi
authors.affiliation: Faculty of Science, Physics Department, Bu-Ali Sina University, Hamedan, Iran.
authors.forename: Babak
authors.initials: B
authors.lastname: Jaleh
authors.affiliation: Faculty of Science, Physics Department, Bu-Ali Sina University, Hamedan, Iran.
authors.forename: Mastaneh
authors.initials: M
authors.lastname: Gandomi
authors.affiliation: Department of Occupational Health, School of Public Health, Iran University of Medical Sciences, Tehran, Iran. Electronic address: hossein.ebrahimi@yahoo.com.
authors.forename: Hossein
authors.initials: H
authors.lastname: Ebrahimi
authors.affiliation: Department of Occupational Health Engineering, Faculty of Health, Kurdistan University of Medical sciences, Sanandaj, Iran.
authors.forename: Kamal
authors.initials: K
authors.lastname: Ad-Din Abedi
keywords: Byproducts reduction; Expanded graphite; Non-thermal plasma; Photocatalyst; TiO(2)/ZnO catalysts