PLASMA-ASSISTED DIESEL OXIDATION CATALYST: IMPROVEMENT OF LIGHT-OFF TEMPERATURE FOR CO AND UNBURNED HYDROCARBONS - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2014

PLASMA-ASSISTED DIESEL OXIDATION CATALYST: IMPROVEMENT OF LIGHT-OFF TEMPERATURE FOR CO AND UNBURNED HYDROCARBONS

Résumé

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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Dates et versions

hal-01059355 , version 1 (29-08-2014)

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  • HAL Id : hal-01059355 , version 1

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Alexis Leray, Maxime Makarov, Jean Marie Cormier, Ahmed Khacef. PLASMA-ASSISTED DIESEL OXIDATION CATALYST: IMPROVEMENT OF LIGHT-OFF TEMPERATURE FOR CO AND UNBURNED HYDROCARBONS. XXth International Conference on Gas Discharges and their Applications, Jul 2014, Orléans, France. pp.582-585. ⟨hal-01059355⟩
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