Influence of Plasma Temperature on the Concentration of NO Produced by Pulsed Arc Discharge

• Published in: Plasma science & technology Vol. 14; no. 3; pp. 257 - 262
• Main Author: 胡辉 陈卫鹏 张锦丽 陆僖 何俊佳
• Format: Journal Article
• Language: English
• Published: 01.03.2012
• Subjects: NO2; 二氧化氮浓度; 放电电流; 电弧等离子体; 空气放电; 等离子体温度; 等离子发射光谱; 脉冲电弧放电
• ISSN: 1009-0630
• DOI: 10.1088/1009-0630/14/3/13

This study conducted experiments on producing inhaled medical nitric oxide （iNO） by pulsed arc discharge in dry and clean air under different discharge current. The concentration of NO and NO2 produced by air discharge, as well as the change of the ratio of NO2/NO under different discharge current were investigated. Through the analysis of plasma emission spectrum, the relationship between discharge current and arc plasma temperature was studied. The results indicate that, as discharge current increases, the arc plasma temperature increases, which then leads to the increase of NO concentration, the decrease of NO2 concentration, and the rapid decrease of the ratio of NO2/NO. When the plasma temperature is 9000 K, the ratio of NO2/NO is approximately 60%, while when the plasma temperature varies between 10550 K and 11300 K, the NO2/NO ratio is within the range of 4.2% to 4.6%.