低温等离子净化挥发性有机废气研究进展 精灵论文.doc

低温等离子净化挥发性有机废气研究进展 章旭明，闫克平 （浙江大学化工系，杭州 310028） 5 摘要：低温等离子体系统被认为是复合污染物控制的有效途径。等离子体过程中产生的离子 可用于静电收尘，产生的 O 和 OH 自由基则用于有机废气的氧化。尽管等离子治理有机废 气技术的基本过程仍需详解，然而这并不阻碍其商业应用。本文从电源和等离子体处理工艺 研究进展出发，围绕有机废气处理过程中的两个核心问题：能效研究和副产物控制进行讨论。 对于电源来说，交直流叠加和短脉冲供电方式是相对性价比最高的，可以轻易达到 90%以 10 上的能量传输效率。对于等离子体处理工艺来说，最近提出的等离子体与传统治理工艺（如 催化、吸附和吸收）相结合的方式可明显提高处理效率和抑制副产物，具有广阔的应用前景， 进一步的需要对其使用寿命作深入研究。 关键词：大气污染控制，等离子技术；挥发性有机气体；治理 中图分类号：X511 15 Application of Non-thermal Plasma for VOCs Removal Zhang Xuming, Yan keping (Zhejiang university, Hangzhou 310028) Abstract: Non-thermal plasma technology has been considered as a potential tool for multi-pollutant 20 emission control. In non-thermal plasma space, the generation of ions and chemical active species (such as O and OH radicals) are useful for electrostatic precipitation and air pollutants oxidation. As fundamental mechanism of plasma generation and processes are still under investigation, some of techniques have already been developed in pilot scale tests. This paper discusses two critical issues related to applications of Non-thermal plasma for VOCs abatement: energy efficiency enhancement 25 and secondary pollutant emission control. The power source and plasma processing techniques are considered as important factors. With regard to power source, AC/DC and Nano-second pulsed power source shows very high potential. More than 90% of electrical energy conversion efficiency can be easily obtained with such source. With regard to plasma processing technique, the combination of plasma with catalysis and other traditional after treatment methods (e.g. liquid sorption and activated 30 carbon fiber adsorption) is consider as the next generation of processing techniques. These processing techniques not only aim to promote energy efficiency but also aim to restrain by-products formation. More investigations are called for enhancing their long-term operation performance to bridge the gap between fundamental studies and industrial applications. Key words: Air pollu