窄前沿高压脉冲放电等离子体降解水中苯胺

采用高压电极在气相、接地极在液相的针-板式放电装置,考察了窄前沿高压脉冲放电等离子体降解水中苯胺的效果。比较了窄前沿高压脉冲放电(上升沿为25 μs)和常规高压脉冲放电(上升沿为5 μs)的脉冲波形、单脉冲能量、脉冲功率、对苯胺的降解效果、能量利用率以及发射光谱的差异。实验结果表明,窄前沿高压脉冲和常规高压脉冲放电的单脉冲能量分别为0.0078 J和0.016 J,脉冲功率分别为1.02 W和1.285 W,放电60 min后对苯胺的降解率分别为90%和55%,前者的能量利用率是后者的 2.06倍。利用多通道光纤光谱仪在气相放电中检测到5种活性物质,分别是O、O+、N2、N和·OH,且窄前沿脉冲产生活性物质的信号强度高于常规脉冲。

Degradation of aniline in water by quick rising time pulsed plasma

Degradation of aniline in water by quick rising time pulsed plasma was investigated with a needle-plate discharge apparatus in which the anode in the gas and the cathode in the liquid. Performance differences between the quick rising pulsed discharge (rising time is 25 ns) and the normal pulsed discharge (rising time is 5 μs), such as pulse waveforms, single pulse energy, pulse power input, effects on the aniline degradation, energy efficiency and the emission spectra, were compared. Experimental results indicated that as for quick rising pulsed discharge and normal pulsed discharge, the single pulse energies were 0.0078 J and 0.016 J, the pulse powers were 1.02 W and 1.285 W, the degradation rates of aniline were 90% and 55% when being operated for 60 minutes, respectively. Energy efficiency of quick rising pulsed discharge is higher than that of the normal pulsed discharge by the factor of 2.06. Five active species, O, O +, N2, N and ·OH were detected in gas phase by multi-channel fiber optic spectrometer during the discharging, and the emission intensity of the quick rising pulsed discharge were stronger than that of the normal pulsed discharge.