不同低温等离子体反应器降解VOCs的研究进展

Research Progress on Degradation of VOCs by Non-Thermal Plasma Under Different Reactors

挥发性有机物(VOCs)可对人体及自然环境造成严重危害,低温等离子体技术适用范围广且能在常温常压下分解VOCs.对不同类型的低温等离子体反应器进行分类,并关注其对降解效果的影响,结果表明:在配电参数和配气参数不变的情况下,线-筒式电晕放电反应器和电极的直径、线-板式电晕放电反应器的线线间距和线板间距对降解效率影响较大;圆筒式介质阻挡放电反应器在性能上优于平板式介电阻挡放电反应器;等离子体内催化反应器降解VOCs的能力优于等离子体后催化反应器,但在副产物控制方面不如等离子体后催化反应器;催化剂的选择在VOCs的降解中有重要影响.最后,对等离子体反应器的发展进行了展望.

Volatile organic compounds(VOCs)can do great harm to human body and natural environment.Non-thermal plasma technology has a wide scope of application and can remove VOCs under normal temperature and pressure.Different types of non-thermal plasma reactor are classified in this review and their effect on degradation is also concerning.The results show that while keeping the distribution parameters and gas distribution parameters constant,the diameter of the wire-cylinder corona discharge reactor and electrode,the distance between the wires and wires of the wire plate corona discharge reactor,and the spacing between wire boards has a significant impact on degradation efficiency.In the dielectric barrier discharge reactor,the cylindrical type is superior to the flat type in performance.In-plasma catalysis reactor is superior to post-plasma catalysis reactor in the ability of VOCs removal,but inferior to post plasma catalysis reactor in by-products control.It is very significant to choose suitable catalyst when removing VOCs.The future development is prospected according to the advantages and disadvantages of different plasma reactors in the end of this review.