Natural SciencesChemistryEnvironmental SciencesAir PollutionAir Pollution ControlAtmospheric ChemistryAerosol ChemistryAir Pollutant EmissionsAir PollutantsAir QualityAtmospheric Oxidation ProcessesParticulate MatterAtmospheric Particulate Matter ChemistryDiesel Engine CombustionDiesel Engine OperationDiesel EnginesDiesel Exhaust ParticlesParticulate EmissionsParticulate Matter EmissionsVolatilization
Abstract Nonthermal plasma (NTP) can oxidize and decompose particulate matter (PM) of diesel engines at low temperatures (≤200°C), exhibiting good application prospects. PM samples were collected under different diesel engine loads and were oxidized using an NTP method. The volatile fraction (VF) mass fraction of the PM samples decreases under low engine loads (<70%) and increases under high engine loads (≥70%) after the NTP treatment. NTP can remove aldehyde groups in PM and weaken the volatilization of PM. A higher temperature is needed for the VF to reach its maximum volatilization rate after the NTP treatment. The relative content of the small molecules is significantly higher after the NTP treatment.
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