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Communication Dans Un Congrès Année : 2012

Plasma-assisted diesel oxidation catalyst on bench scale: Focus on light-off temperature and NOx behavior

Résumé

The effect of a non-thermal plasma reactor over a commercial Diesel oxidation catalyst (DOC) was investigated. Studies have been focused on the gas treatment efficiency together with lowering light-off temperature when a DOC catalyst was connected downstream to plasma reactor in test bench scale. Experiments have been conducted using multi-DBDs (dielectric barrier discharge) reactor in planar configuration driven by a HV AC generator (11 kV-15 kHz). The specific input energy was set to 57 and 85 J/L. Experiments were performed in gas composition simulating Diesel exhaust. Commercial DOC, monolith-supported Pt-Pd/Al2O3, was used at gas hourly space velocities of about 55,000 and 82,000 h-1. CO and hydrocarbons light-off curves were determined for DOC, plasma, and plasma-DOC systems by temperature programmed surface reaction from 80 to 400 C. Particular attention has been paid to the gas temperature between the plasma reactor and the DOC. Results show that the plasma-catalyst system provides the lowest light-off températures for CO and HCs. Under conditions of this study, light-off temperature improvement by about 57 C was obtained and the plasma reactor totally oxidized NO to NO2 at low temperature.
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Dates et versions

hal-00822475 , version 1 (14-05-2013)

Identifiants

  • HAL Id : hal-00822475 , version 1

Citer

Alexis Leray, Audrey Guy, Maxime Makarov, Karine Lombaert, Jean Marie Cormier, et al.. Plasma-assisted diesel oxidation catalyst on bench scale: Focus on light-off temperature and NOx behavior. 9th International Congress on Catalysis and Automotive Pollution Control (CAPoC 9), Aug 2012, Bruxelles, Belgium. pp.P49. ⟨hal-00822475⟩
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