title: Degradation of gaseous dioxin-like compounds with dielectric barrier discharges.
abstract: Developing effective technologies to reduce dioxin emissions has become an important issue in the research and industrial fields. In this study, a dioxin-containing gas stream generating system was applied to evaluate the effectiveness of dielectric barrier discharge (DBD) plasma technology for the destruction of dioxin-like compounds. The results indicate that the destruction efficiencies of dioxin-like compounds achieved with DBD plasma strongly depend on the composition of the simulated gas stream. As the DBD plasma is operated with the simulated gas stream containing 20% water vapor, around 74% PCDDs and 89% PCDFs can be destroyed by DBD plasma. UV, electrons, and OH radicals are generated via the DBD plasma process and react with the dioxin-like compounds in the gas stream. Dechlorination via UV and electrons and decomposition via OH radicals occur at the same time and significantly increase the destruction efficiency of PCDD/Fs in the presence of oxygen and water vapor. Additionally, the total toxicity destruction of dioxin-like compounds with the input energy of 1 kJ increases from 1.47 to 3.06 ng-TEQ(WHO) as the water vapor is incorporated into the gas stream.
authors.affiliation: Graduate Institute of Environmental Engineering, National Central University, Chungli 320, Taiwan.
authors.forename: Pao Chen
authors.initials: PC
authors.lastname: Hung
authors.forename: Shu Hao
authors.initials: SH
authors.lastname: Chang
authors.forename: Kai Hsien
authors.initials: KH
authors.lastname: Chi
authors.forename: Moo Been
authors.initials: MB
authors.lastname: Chang
mesh_terms: D004147:Dioxins / Q000737:chemistry*; D004560:Electricity; D058626:Plasma Gases
chemical_list: D004147:Dioxins; D058626:Plasma Gases