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

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