Makarov Maxime

Tuesday 8
F. Environmental and Medical Applications
Chair: S. Starikoskaia - Each talk is 10'+2' duration
› 17:00 - 17:10 (10min)
› Blaise
Plasma-Assisted Diesel Oxidation Catalyst: Improvement of Light-Off Temperature for CO and Unburned Hydrocarbons
Alexis Leray  1  , Maxime Makarov  2  , Jean-Marie Cormier  3@  , Ahmed Khacef  1, *@  
1 : 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
2 : RENAULT SA
RENAULT SA
RENAULT S.A.S, FR TCR RUC T 62, 1 avenue du Golf, 78288 Guyancourt -  France
3 : 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
* : Corresponding author

Low temperature oxidation of high levels of CO and gas phase hydrocarbons (HCs) emissions, as created by HCCI-like combustion engines, has been investigated. Performances of commercial Euro5 Diesel oxidation catalyst (DOC, Pt-Pd/Al2O3) were evaluated by determining its light-off temperature when it is placed downstream of a pilot-scale multi-DBDs reactor powered by an AC generator delivering an average power in the range 50-300 W. DOC performances with and without plasma have been systematically compared under various operating conditions (input energy density, space velocity, flow rate, temperature). Results demonstrate the capability of the plasma to lower the DOC light-off temperature (T50) for CO and HCs. Improvement of T50 by about 60°C was obtained and could explained through chemical exothermic mechanisms involving the plasma species over the active catalytic sites. This approach show that DOC and plasma work synergistically to promote selectively HCs oxidation at low temperature. C3H6 exhibit the high oxidation rate followed by C7H8, C10H22, and CH4.

 


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