介质阻挡放电等离子体中·OH和HO2·自由基的数值模拟计算  

Numerical Simulation of ·OH and HO_2· Radicals in Dielectric Barrier Discharge Plasmas

作　　者：王丽娜[1] 刘忠伟[1] 朱爱民[1] 赵国利[1] 徐勇[1] 

机构地区：[1]大连理工大学等离子体物理化学实验室,辽宁大连116024

出　　处：《物理化学学报》2008年第8期1400-1404,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(10475015);“863”计划课题(2007AA06Z311)资助项目

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.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 chemic, al kinetics model in dielectric barrier discharge was reported. The evolution of · OH, HO2· and electron as tractions 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.

关 键 词：介质阻挡放电 ·OH HO2· 化学动力学 模拟 

分 类 号：O641.1[理学—物理化学]