title: Effect of diesel oxidation catalysts on the diesel particulate filter regeneration process.
abstract: A Diesel Particulate Filter (DPF) regeneration process was investigated during aftertreatment exhaust of a simulated diesel engine under the influence of a Diesel Oxidation Catalyst (DOC). Aerosol mass spectrometry analysis showed that the presence of the DOC decreases the Organic Carbon (OC) fraction adsorbed to soot particles. The activation energy values determined for soot nanoparticles oxidation were 97 ± 5 and 101 ± 8 kJ mol(-1) with and without the DOC, respectively; suggesting that the DOC does not facilitate elementary carbon oxidation. The minimum temperature necessary for DPF regeneration was strongly affected by the presence of the DOC in the aftertreatment. The conversion of NO to NO(2) inside the DOC induced the DPF regeneration process at a lower temperature than O(2) (ΔT = 30 K). Also, it was verified that the OC fraction, which decreases in the presence of the DOC, plays an important role to ignite soot combustion.
authors: Université de Lyon, Institut de Recherches sur la Catalyse et l'Environnement de Lyon, UMR 5256, CNRS, Université Claude Bernard Lyon 1, 2 Avenue A. Einstein, 69626 Villeurbanne, France. leonardo.lizarraga@ircelyon.univ-lyon1.fr
authors: Leonardo
authors: L
authors: Lizarraga
authors: Stamatios
authors: S
authors: Souentie
authors: Antoinette
authors: A
authors: Boreave
authors: Christian
authors: C
authors: George
authors: Barbara
authors: B
authors: D'Anna
authors: Philippe
authors: P
authors: Vernoux
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control; D002384:Catalysis; D010084:Oxidation-Reduction; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D001335:Vehicle Emissions