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Plasma Chemistry and Plasma Processing, 2015, Volume 35, Issue 1, pp 217-230.
Arne M. Vandenbroucke 1, Robby Aerts2, Wouter Van Gaens 2, Nathalie De Geyter 1, Christophe Leys1, Rino Morent1, Annemie Bogaerts2.
- Department of Applied Physics, Research Unit Plasma Technology, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, 9000, Ghent, Belgium
- Department of Chemistry, Research Group PLASMANT, University of Antwerp, Universiteitsplein 1, 2160, Antwerp, Belgium
Abstract
In this work, we study the abatement of dilute trichloroethylene (TCE) in air with a negative direct current corona discharge. A numerical model is used to theoretically investigate the underlying plasma chemistry for the removal of TCE, and a reaction pathway for the abatement of TCE is proposed. The Cl atom, mainly produced by dissociation of COCl, is one of the controlling species in the TCE destruction chemistry and contributes to the production of chlorine containing by-products. The effect of humidity on the removal efficiency is studied and a good agreement is found between experiments and the model for both dry (5 % relative humidity (RH)) and humid air (50 % RH). An increase of the relative humidity from 5 % to 50 % has a negative effect on the removal efficiency, decreasing by ±15 % in humid air. The main loss reactions for TCE are with ClO·, O· and CHCl2. Finally, the by-products and energy cost of TCE abatement are discussed.
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