Effect of regeneration method and ash deposition on diesel particulate filter performance: a review

As countries around the world pay more attention to environmental protection, the corresponding emission regulations have become more stringent. Exhaust pollutants cause great harm to the environment and people, and diesel engines are one of the most important sources of pollution. Diesel particulate filter (DPF) technology has proven to be the most effective way to control and treat soot. In this paper, we review the latest research progress on DPF regeneration and ash. Passive regeneration, active regeneration, non-thermal plasma-assisted DPF regeneration and regeneration mechanism, DPF regeneration control assisted by engine management, and uncontrolled DPF regeneration and its control strategy are mainly introduced. In addition, the source, composition, and deposition of ash are described in detail, as well as the effect of ash on the DPF pressure drop and catalytic performance. Finally, the issues that need to be further addressed in DPF regeneration research are presented, along with challenges and future work in ash research. Over all, composite regeneration is still the mainstream regeneration method. The formation of ash is complex and there are still many unanswered questions that require further in-depth research.

Automated summary

With the increasing attention to environmental protection, emission regulations have become stricter worldwide. Diesel engines are a major source of pollution, and the exhaust pollutants cause significant harm to the environment and human health. Diesel particulate filter (DPF) technology has been proven to be the most effective way to control and treat soot. This paper provides a comprehensive review of the latest research progress on DPF regeneration and ash, including different regeneration methods, ash composition and deposition, and the impact of ash on DPF performance.