利用低温等离子体技术脱除甲醛的研究

Removal of Formaldehyde Using Non-Thermal Plasmas Technology

利用低温等离子体技术对脱除甲醛进行实验研究．设计了介质阻挡放电和电晕放电反应器,并分别加 以高频交流高压和交直流叠加高压．比较了在不同工作参数下甲醛的脱除效果．实验结果表明,用介质阻挡放电 脱除甲醛的脱除率及能量效率都比电晕放电的高,在低体积分数(10-5下)其脱除率可达99％以上,在高体积 分数(2×10-4 左右)其脱除率可达90％以上．这说明在甲醛体积分数相对于室内空气甲醛含量超标100倍内时, 可利用介质阻挡放电脱除甲醛．

Experimental results are presented for removal of formaldehyde using non-thermal plasmas technology. DBD and corona discharge reactors are designed in the research. The high frequency AC high voltage and DC-AC high voltage are applied on the two kinds of reactors respectively, and the removal effects of formaldehyde are compared under different working parameters. The results show that DBD is more feasible than corona discharge for the removal of formaldehyde with a removal rate of more than 99% under low concentration (10-5) and more than 90% under high concentration (≈2×10-4). This indicates that the formaldehyde can be removed to under national standard by DBD if the formaldehyde concentration is not 100 times more than national standard for formaldehyde.