非平衡等离子体特征量对NO脱除效率的影响

采用数值模拟的方法开展了非平衡等离子体脱除烟气中NO的研究,考察了非平衡等离子体放电中的2个主要特征量（电子数密度n_e和电子平均能量 ）对NO脱除效率的影响。计算结果表明,NO脱除效率随电子数密度n_e和电子平均能量 的变化而有不同程度的变化,相比较而言,电子数密度量级变化对NO脱除效率的影响更大。在NO初始分子浓度（粒子数密度）为10¹⁶ cm^-3情况下,电子数密度较高（10¹⁷ cm^-3）时,即使电子平均能量 低至4 eV,也可获得高达99%的NO脱除效率。当电子数密度和电子平均能量保持不变时,NO脱除效率随着NO初始分子浓度的增加而降低。

Effect of Non-Equilibrium Plasma Characteristics on NO Removal Efficiency

The numerical simulation method is adopted to study NO removal from the flue gas by non-equilibrium plasma. The influence of two major characteristics in non-equilibrium plasma (electron number density n_e and electron average energy ) on NO removal efficiency is investigated. The simulation results show that the NO removal efficiency varies with the electron number density n_e and the electron average energy . In comparison, the electron number density plays a much more important role in NO removal efficiency. When the initial concentration of NO is 10¹⁶ cm^-3 and the electron density is high(n_e≥10¹⁷ cm^-3 ), the NO removal efficiency can get up to 99% even though the electron average energy is as low as 4 eV. Given constant density of the electron number and the average electron energy, the NO removal efficiency worsens as the initial concentration of NO rises.