物理化学学报 >> 2008, Vol. 24 >> Issue (08): 1400-1404.doi: 10.3866/PKU.WHXB20080813

研究论文 上一篇    下一篇

介质阻挡放电等离子体中·OH和HO2·自由基的数值模拟计算

王丽娜; 刘忠伟; 朱爱民; 赵国利; 徐勇   

  1. 大连理工大学等离子体物理化学实验室, 辽宁 大连 116024; 大连理工大学三束材料改性国家重点实验室, 辽宁 大连 116024
  • 收稿日期:2008-03-24 修回日期:2008-04-15 发布日期:2008-08-06
  • 通讯作者: 徐勇 E-mail:yongxu@dlut.edu.cn

Numerical Simulation of·OH and HO2· Radicals in Dielectric Barrier Discharge Plasmas

WANG Li-Na; LIU Zhong-Wei; ZHU Ai-Min; ZHAO Guo-Li; XU Yong   

  1. Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Liaoning Province, P. R. China; State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2008-03-24 Revised:2008-04-15 Published:2008-08-06
  • Contact: XU Yong E-mail:yongxu@dlut.edu.cn

摘要: 在介质阻挡放电等离子体N2/O2/H2O/HCHO体系中通过解Boltzmann方程, 得到电子能量分布函数, 利用得到的电子能量分布函数计算电子-分子碰撞反应速率常数. 然后把有关的反应速率常数带入速率方程, 计算得到该体系在介质阻挡放电时,·OH、HO2·和电子的浓度随时间的演变以及·OH、HO2·浓度随H2O、O2摩尔分数的变化, 并将模拟结果与实验值进行了对比, 两者符合得较好.

关键词: 介质阻挡放电, ·OH, HO2·, 化学动力学, 模拟

Abstract: Electron energy distribution functions for N2/O2/H2O/HCHO dielectric barrier discharge plasma were obtained by numerically solving the Boltzmann equation. The electron-molecule reaction constants were calculated using the computed electron energy distribution function. A space averaged chemical kinetics model in dielectric barrier discharge was reported. The evolution of·OH, HO2·and electron as functions of time were studied. The influences of H2O and O2 molar ratios on the generations of·OH and HO2·were also discussed. The calculated results were in good agreement with our experiments result.

Key words: Dielectric barrier discharge, ·OH, HO2·, Chemical kinetics, Modeling

MSC2000: 

  • O643