In view of the defect of traditional regeneration method for diesel particulate filter(DPF)

the DPF regeneration at low temperature using non thermal plasma(NTP) technology was explored based on the NTP discharge theory. The chemical reaction mechanism of DPF generation with NTP technology was discussed from the point of view of chemical reaction kinetics

and the effect of NTP on the particle size distribution

micro morphology

carbon structure and surface functional group of particulate matter(PM) were researched with modern testing and analysis technologies. Then an experimental system for DPF regeneration with NTP technology was established

and the regeneration of DPF which had captured PM was experimentally carried out. The oxidation decomposition and regeneration characteristics of DPF at different initial temperatures were studied

and the safety of DPF regeneration with NTP technology was investigated by monitoring the volume fractions of CO and CO2

the internal temperature of DPF

and the change of DPF back pressure. The research results indicate that the NTP technology can effectively decompose PM from diesel engine exhaust gas

and significantly reduce the regeneration temperature of DPF without catalyst. This provides a new research approach for DPF regeneration.