物理化学学报 >> 2011, Vol. 27 >> Issue (08): 1979-1984.doi: 10.3866/PKU.WHXB20110802

光化学和辐射化学 上一篇    下一篇

介质阻挡放电中OH自由基对甲醛脱除的影响

史恒超, 王文春, 杨德正, 霍岩, 贾莉   

  1. 大连理工大学三束材料改性教育部重点实验室, 辽宁 大连 116024
  • 收稿日期:2011-01-26 修回日期:2011-05-05 发布日期:2011-07-19
  • 通讯作者: 王文春 E-mail:wangwenc@dlut.edu.cn
  • 基金资助:

    国家自然科学基金(50977006, 10575019), 辽宁省教育厅重点实验室项目(2009S017)和中央高校基本科研业务费专项资金 (DUT10JR03)资助项目

Effect of OH Radicals on Formaldehyde Removal in Dielectric Barrier Discharge

SHI Heng-Chao, WANG Wen-Chun, YANG De-Zheng, HUO Yan, JIA Li   

  1. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2011-01-26 Revised:2011-05-05 Published:2011-07-19
  • Contact: WANG Wen-Chun E-mail:wangwenc@dlut.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50977006, 10575019), College Scientific Research Program of the Liaoning Education Department, China (2009S017), and Fundamental Research Funds for the Central Universities, China (DUT10JR03).

摘要:

对管线式介质阻挡放电中的甲醛脱除进行了实验研究, 测量了介质阻挡放电产生的OH (A2ΣX 2Π, 0-0)自由基发射光谱. 研究了在一个大气压下不同放电峰值电压、放电频率、添加氩气和氧气时甲醛脱除率与OH自由基发射光谱强度的变化关系. 实验结果表明: 在氮气含甲醛体系中, 提高放电峰值电压、放电频率和增大氩气含量时, 甲醛脱除率随OH (A2ΣX 2Π, 0-0)自由基发射光谱强度的增强而提高; 当在氮气含甲醛体系中增大氧气含量时, 甲醛脱除率随OH (A2ΣX 2Π, 0-0)自由基发射光谱强度的减弱而降低. 在11.5 kV放电峰值电压和9 kHz放电频率下, 氮气含甲醛体系中甲醛脱除率达93.8%.

关键词: 介质阻挡放电, 甲醛脱除, OH自由基, 发射光谱, 大气压

Abstract:

The removal of formaldehyde by dielectric barrier discharge in a coaxial cylindrical reactor has been studied at atmospheric pressure. The emission spectra of OH (A2ΣX 2Π, 0-0) emitted from the dielectric barrier discharge have been successfully recorded. The relationship between the removal efficiency of formaldehyde and the emission intensity of OH (A2ΣX 2Π, 0-0) has been investigated at different applied voltages, driving frequencies, concentrations of argon and oxygen. We find that the removal efficiency of HCHO increases when the emission intensity of OH (A2ΣX 2Π, 0-0) increases with rising applied voltage, driving frequency, and concentration of argon. However, the removal efficiency of HCHO decreases when the emission intensity of OH (A2ΣX 2Π, 0-0) decreases with an increase in the concentration of oxygen. The removal efficiency of HCHO is 93.8% in N2+HCHO mixed gas at 11.5 kV applied voltage and 9 kHz driving frequency.

Key words: Dielectric barrier discharge, Formaldehyde removal, OH radical, Emission spectrum, Atmospheric pressure

MSC2000: 

  • O644