Effect of electrode shape in dielectric barrier discharge plasma reactor for NOx removal
Effect of electrode shape in dielectric barrier discharge plasma reactor for NOx removal
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DOI：
10.1109/tps.2004.823973
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发表时间：
2003-06
影响因子：
1.5
通讯作者：
K. Takaki;M. Shimizu;S. Mukaigawa;T. Fujiwara
中科院分区：
文献类型：
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作者：
K. Takaki;M. Shimizu;S. Mukaigawa;T. Fujiwara
为提高介质阻挡放电反应器的氮氧化物（NOx）去除效率，对不同电极形状的介质阻挡放电反应器进行了模拟柴油机尾气中NOx的去除实验研究。在实验中采用的电极是一个平面，一个沟槽，和多点的几何形状。用作多点的右锥体具有45/spl度/尖端角和1-5 mm的高度。多点电极在132 cm/sup 2/（22 /spl次/ 6 cm）的面积中具有528-5000个锥体。沟槽电极具有5 mm高和45/spl deg/尖端角的刀刃轨道。采用氧化铝介质阻挡层涂层平面电极作为高压电极，施加频率为数十千赫兹的正弦高压。以含200 ppm NO的N/sub 2/：O/sub 2/=9：1混合气体为模拟气体，气体流量为5 L/min，平面电极和沟槽电极的NO去除率低于多点电极。随着电极上金字塔数量的增加，NO去除率急剧下降。在本实验条件下，NO的去除率几乎不受棱锥体投影高度的影响。
An experimental study on nitrogen oxides (NOx) removal from a simulated diesel engine exhaust gas was carried out in geometry of various electrodes for dielectric barrier discharge reactor to improve the removal efficiency. The electrodes employed in the experiment were a plane, a trench, and a multipoint geometry. The right-pyramids, which were used as multipoint, had 45/spl deg/ tip angle and a height of 1-5 mm. The multipoint electrodes have 528-5000 pyramids in an area of 132 cm/sup 2/ (22 /spl times/ 6 cm). The trench electrode has knife-edge rails with 5-mm height and 45/spl deg/ tip angle. The alumina dielectric barrier coated plane electrode was used as a high-voltage electrode, to which a sinusoidal high voltage was applied with frequency of several tens kilohertz. The N/sub 2/:O/sub 2/=9:1 mixed gas containing 200-ppm NO was used as simulated gas with gas flow rate of 5 L/min. NO removals in case of the plane and the trench electrodes were lower than that in case of multipoint one. NO removal yield drastically decreases with increasing the number of pyramids on the electrode. NO removal efficiency was almost independent of the pyramid projection height under our experimental condition.