Modeling and Experimental Study of Trichloroethylene Abatement with a Negative Direct Current Corona Discharge

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. T...

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Bibliographic Details
Published in:Plasma chemistry and plasma processing 2015, Vol.35 (1), p.217-230
Main Authors: Vandenbroucke, Arne M., Aerts, Robby, Van Gaens, Wouter, De Geyter, Nathalie, Leys, Christophe, Morent, Rino, Bogaerts, Annemie
Format: Article
Language:English
Subjects:
Byproducts
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Classical Mechanics
Coronas
Direct current
Humidity
Inorganic Chemistry
Mathematical models
Mechanical Engineering
Original Paper
Plasma chemistry
Relative humidity
Trichloroethylene
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Summary: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 CHCl 2 . Finally, the by-products and energy cost of TCE abatement are discussed.
ISSN:0272-4324
1572-8986
DOI:10.1007/s11090-014-9584-7