Tuesday 8
F. Environmental and Medical Applications
Chair: S. Starikoskaia - Each talk is 10'+2' duration
› 17:10 - 17:25 (15min)
› Blaise
Pulsed DBD-Catalyst Hybrid Reactor for Environmental Clean-Up: VOCs Oxidation in Air at Low Temperature
Thien Pham Huu  1  , Malgorzata Adamowska  2  , Patrick Da Costa  3  , Jean-Marie Cormier  4@  , Ahmed Khacef  5@  
1 : Groupe de Recherches sur l'Energétique des Milieux Ionisés  (GREMI)
GREMI
UMR 7344, CNRS-Université d'Orléans PolyTech'Orléans, 14 rue d'Issoudun, BP 6744, 45067 Orléans Cedex 02, France -  France
2 : IJLRA
IJLRA
UPMC, 2 place de la gare de ceinture, 78210 Saint Cyr l'École -  France
3 : IJLRA
IJLRA
UPMC, 2 place de la gare de ceinture, 78210 Saint Cyr l'École, France. -  France
4 : Groupe de recherches sur l'énergétique des milieux ionisés  (GREMI)  -  Website
CNRS : UMR7344, Université d'Orléans
14 Rue d'Issoudun - BP 6744 45067 ORLEANS CEDEX 2 -  France
5 : Groupe de Recherches sur l'Energétique des Milieux Ionisés  (GREMI)
GREMI
UMR 7344, CNRS-Université d'Orléans 14 rue d'Issoudun, BP 6744, 45067 Orléans Cedex 02 -  France

The combination of pulsed dielectric barrier discharge with palladium supported on alumina catalysts (0.5 and 1 wt%Pd) was investigated for the oxidation of volatile organic compounds (CH4, C3H6, and C7H8) in air at atmospheric pressure, temperature up to 500°C, and input plasma energy up to 145 J/L. The plasma-catalysis interaction revealed the benefit effect of the plasma on the CH4, C3H6, and C7H8 oxidation even at low temperature leading to high selectivity in CO2 than only-plasma reaction. At room temperature, the plasma could activate both alumina and Pd/Al2O3 catalysts. For such systems, the light-off curves were shifted toward lower temperatures as the plasma input energy increased. At a given energy, the plasma-catalyst was helpful in minimizing the by-products formation. At low temperature, these mechanisms could be explained by the plasma-induced interactions between reactive species and catalyst active sites whereas at higher temperature the thermal processes become predominant overtaking the contribution of the plasma-activated processes.

 


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