Abstract
Coupling Non-thermal plasma (dielectric barrier discharge) with photocatalysis (TiO2-/UV) can be a promising technique to improve indoor air quality. In this study, Butane-2,3-dione and Heptan-2-one, usually found in food industry, were used as target compounds. Firstly, each pollutant was studied alone by photocatalytic treatment under experimental parameter effects like gases flow rate, VOCs inlet concentration, and humidity levels. Otherwise, in order to understand pollutants reaction mechanisms, a complex composition mixture was then studied and discussed. Experiments with dry and wet air showed good Heptan-2-one removal but negatively affected Butane-2,3-dione elimination rate. The Butane-2,3-dione/Heptan-2-one oxidation study was carried out by cold plasma-photocatalysis combination in the same pilot reactor. Excellent treatment yields were observed in terms of pollutant removal efficiency, mineralization and Ozone decomposition. Additionally, intermediate by-product exhausts from three technologies e.g. TiO2/UV-light system, DBD-plasma and their combination are identified.
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