物理化学学报 >> 2005, Vol. 21 >> Issue (12): 1352-1356.doi: 10.3866/PKU.WHXB20051205

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介质阻挡放电等离子体脱除氮氧化物的发射光谱研究

刘晶;牛金海;徐勇;朱爱民;孙琪;聂龙辉   

  1. 大连理工大学等离子体物理化学实验室, 大连 116024
  • 收稿日期:2005-04-13 修回日期:2005-06-24 发布日期:2005-12-15
  • 通讯作者: 徐勇 E-mail:labplpc@dlut.edu.cn

Optical Emission Spectroscopy Diagnosis on Decomposition of NO in NO/N2 Mixtures in Dielectric Barrier Discharge Plasma

LIU Jing;NIU Jin-Hai;XU Yong;ZHU Ai-Min;SUN Qi;NIE Long-Hui   

  1. Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024
  • Received:2005-04-13 Revised:2005-06-24 Published:2005-12-15
  • Contact: XU Yong E-mail:labplpc@dlut.edu.cn

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摘要： 在大气压下, NO/N2体系中, 利用发射光谱技术对50 Hz和5 kHz交流介质阻挡放电等离子体在200～900 nm范围内进行了诊断. 在632、674.5、715.5和742 nm等处测得了N原子的谱线. 利用化学发光法NOx分析仪, 模块式红外吸收气体分析检测仪, 大气压下直连质谱多种检测手段对放电前后的稳定物种进行了分析, 观察到O2的生成. 初步讨论了无氧条件下介质阻挡放电等离子体中NO脱除的反应机制.

关键词: 大气压, 介质阻挡放电, 等离子体, NO, N原子, 发射光谱, 质谱

Abstract: The optical emission spectroscopy of NO/N2 in dielectric barrier discharge (DBD) plasmas using a. c. with frequeucies of 50 Hz and 5 kHz has been studied at atmospheric pressure. Excited-state nitrogen atom was detected at 632, 674.5, 715.5 and 742 nm. The concentrations of the mixtures were measured by using chemilluminescence NOx analyzer and N2O infrared gas analyzer; the production of O2 was also monitored by an on-line mass spectrograph after the discharge. The reaction mechanism of the removal of NO in N2 in DBD plasma was discussed.

Key words: Atmospheric pressure, Dielectric barrier discharge, Plasma, NO, Nitrogen atom, Optical emission spectroscopy, MS