Influence of plasma temperature on the concentration of NO produced by pulsed arc discharge

HU Hui (胡辉); CHEN Weipeng(陈卫鹏); Zhang Jin-li (张锦丽); LU Xi (陆僖); HE Junjia(何俊佳)

doi:10.1088/1009-0630/14/3/13

Plasma Science and Technology > 2012 > 14(3): 257-262. > DOI: 10.1088/1009-0630/14/3/13

HU Hui (胡辉), CHEN Weipeng(陈卫鹏), Zhang Jin-li (张锦丽), LU Xi (陆僖), HE Junjia(何俊佳). Influence of plasma temperature on the concentration of NO produced by pulsed arc discharge[J]. Plasma Science and Technology, 2012, 14(3): 257-262. DOI: 10.1088/1009-0630/14/3/13

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Influence of plasma temperature on the concentration of NO produced by pulsed arc discharge

1.
College of Environmental Science and Engineering, Huazhong University of Science and Technology,Wuhan 430074, China
2.
College of Electrical & Electronic Engineering, Huazhong University of Science and Technology,Wuhan 430074, China

Funds: supported by the National Natural Science Foundation of China (No. 50677026), The Graduates’ Innovation Foundation of Huazhong University of Science and Technology (HF-08-11-2011-261)

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Received Date: October 12, 2010

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Abstract

Abstract

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 9000K, the ratio of NO2/NO is approximately 60%, while when the plasma temperature varies between 10550K and 11300K, the NO2/NO ratio is within the range of 4.2% to 4.6%.
- Inhaled NO,
- pulsed arc,
- plasma temperature,
- arc current.

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