Effect of Oxygen Percentage on the Removal of Acetaldehyde by Dielectric Barrier Discharges
O. Koeta1, 2, N. Blin-Simiand1, S. Pasquiers1, F. Jorand1, and A. Bary2
1Laboratoire de Physique des Gaz et des Plasmas, CNRS et Université Paris Sud, France
2Laboratoire de Chimie Analytique de Radiochimie et d’Electrochimie, Université de Ouagadougou, Burkina Faso
Abstract— This work focuses on the effect of oxygen percentage on the conversion of acetaldehyde by dielectric barrier discharges in N2/O2/CH3CHO (below 1000 ppm) mixtures, at atmospheric pressure, at 20ﾂｰC and 300ﾂｰC. For energy values below 50 J/L the acetaldehyde conversion follows an exponential decrease, for higher values the removal is more efficient. The conversion is efficient in nitrogen but the efficiency increases since 1% of oxygen is added in the mixture and then appears to be independent of oxygen percentage. The conversion increases with the temperature. By-products issued from the conversion are identified. Experimental results emphasize that dissociation of CH3CHO by quenchings of N2 metastable states are important processes, even in mixtures containing oxygen.
Keywords— Acetaldehyde, dielectric barrier discharge, dissociation, VOC