Post-Plasma Catalysis for Trichloroethylene Abatement with Ce-Doped Birnessite Downstream DC Corona Discharge Reactor

Catalysts

Rino Morent¹  Rim Bitar¹  Nathalie De Geyter¹  Grêce Abdallah²  Jean-Marc Giraudon²  Jean-François Lamonier² 

[1] Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 (B4), 9000 Ghent, Belgium;Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France;

关键词: post-plasma catalysis;    non-thermal plasma;    trichloroethylene;    ozone decomposition;    Ce-doped birnessite;   

DOI  :  10.3390/catal11080946

来源: DOAJ

【 摘 要 】

Trichloroethylene (TCE) removal was investigated in a post-plasma catalysis (PPC) configuration in nearly dry air (RH = 0.7%) and moist air (RH = 15%), using, for non-thermal plasma (NTP), a 10-pin-to-plate negative DC corona discharge and, for PPC, Ce_0.01Mn as a catalyst, calcined at 400 °C (Ce_0.01Mn-400) or treated with nitric acid (Ce_0.01Mn-AT). One of the key points was to take advantage of the ozone emitted from NTP as a potential source of active oxygen species for further oxidation, at a very low temperature (100 °C), of untreated TCE and of potential gaseous hazardous by-products from the NTP. The plasma-assisted Ce_0.01Mn-AT catalyst presented the best CO₂ yield in dry air, with minimization of the formation of gaseous chlorinated by-products. This result was attributed to the high level of oxygen vacancies with a higher amount of Mn³⁺, improved specific surface area and strong surface acidity. These features also allow the promotion of ozone decomposition efficiency. Both catalysts exhibited good stability towards chlorine. Ce_0.01Mn-AT tested in moist air (RH = 15%) showed good stability as a function of time, indicating good water tolerance also.

【 授权许可】

Unknown