【摘要】 在非平衡等离子体脱除模拟气体系统NO-N2中NO的物理化学模型基础上,加入O2,通过对不同O2初始浓度下NO的脱除过程进行数值模拟,跟踪主要成分粒子NO、NO2浓度随时间的变化,得到了O2初始浓度对系统中主要粒子浓度和NO脱除的影响规律。计算结果表明:O2的存在对非平衡等离子体脱除NO有负面影响,O2的加入导致NO的脱除率降低,O2浓度越高,NO的脱除率降低越多;O2的加入使产物中NO2的生成量增加,体系内所生成的NO2是非平衡等离子体和O2共存的产物;O2存在情况下,电子平均能量越高,导致的NO脱除率降低得越多。更多还原

【Abstract】 On the basis of the physical and chemical models of NO in non-equilibrium plasma based gas removal system NO-N2, the numerical simulation of NO removal process is conducted under different O2 initial concentrations to study the evolution of NO and NO2 concentrations varying with time. The influence of O2 initial concentration on the concentrations of main particles and NO removal is studied. The calculation results show that the presence of O2 has negative impacts on NO removal by non-equilibrium plasma. The NO removal efficiency reduces in the presence of O2. The higher concentration of O2 will lead to more decrease of NO removal efficiency. The adding of O2 increases the NO2 production as the result of the coexistence of non-equilibrium plasma and O2. In the presence of O2, the higher electron average energy will lead to further decrease of NO removal efficiency.更多还原