Abstract: The existing purification and treatment devices of diesel engines can’t meet the increasingly stringent emission regulations. Non-thermal plasma has the characteristics of good purification effect and no secondary pollution, and has increasingly become the focus of diesel engine exhaust research. Focusing on the plasma dominated by hydroxyl radical generated by liquid-like method, this paper expounds its advantages and specific implementation methods, and discusses the technical route of the cooperation between non-thermal plasma, selective catalytic reduction and diesel particulate filter. The research shows that non thermal plasma has remarkable results in improving diesel engine exhaust emission.

Key words: Non-thermal plasma; Purification technology; Diesel engine exhaust; Hydroxyl radical; Select the catalytic reduction method; Diesel particulate filter

摘要： 现有的柴油机尾气净化处理装置已经无法满足日益严格的排放法规，低温等离子技术 凭借其净化效果好、无二次污染的特点，日益成为柴油机废气研究的热点。重点介绍了以羟 基自由基为主的类液相法产生的等离子体，阐述了其优点和具体实现方法，探讨了低温等离 子技术与选择催化还原法、颗粒捕捉器之间协调的技术路线。研究表明，低温等离子技术对 改善柴油机废气排放有显著作用。

关键词: 低温等离子体；净化技术；柴油机尾气；羟基自由基；选择催化还原法；颗粒捕捉器