低温等离子体-催化协同空气净化技术研究进展

Advances in Researches on Catalysis-Assisted Non-Thermal Plasma Technology for Air Pollution Control

低温等离子体协同催化剂净化技术是一种先进的空气污染控制技术,它结合了低温等离子体技术和催化氧化技术的优点,具有能耗低、能源利用率高、副产物少等优势,在环境治理领域有着广阔的应用前景。结合国内外关于低温等离子体与催化剂物化性质的相互影响,以及等离子体驱动光催化方面的研究成果,分析了低温等离子体协同催化技术净化空气的原理,概述了国内外利用该技术处理挥发性有机污染物和氮氧化物的情况,并提出了研究展望,指出国内工作应在深入开展理论研究的基础上,尽早实现该项技术的实际工业应用。

Catalysis-assisted non-thermal plasma is an advanced technology for air pollution control, which combines the advantage of non-thermal plasma with that of catalyzed oxidation. This technology enjoys low energy consumption, high energy efficiency and low by-product formation, and has a promising future in the area of environmental protection. The heterogeneous catalysts can be combined with non-thermal plasma in two configurations： in-plasma catalysis and post plasma catalysis. In this paper, the synergetic effect of the catalysis-assisted non-thermal plasma and the interaction of plasma with catalyst are discussed. It is shown that the changes of plasma properties due to the introduction of catalyst material may be related with changes of discharge types and an enhanced production of new actives species. The plasma discharges will also lead to a change in catalyst properties and an enhanced catalyst adsorption. In addition, the plasma light emission will trigger photocatalysis and is an important factor in the synergy that combines plasma with catalysts. The studies on decomposition of volatile organic compounds and nitrogen oxides using catalysisassisted non-thermal plasma technology are also reviewed in this paper.