微波直接分解脱除NO的数值模拟研究

根据微波直接分解脱除NO的化学反应动力学方程,对NO脱除进行了数值模拟实验研究,分析了影响NO脱除效率和N2选择性的各种因素及规律。研究结果表明,在NO+He体系中,一定的微波功率下,可实现一步高效脱除NO,且主要产物为环境友好的N2。计算结果表明,微波功率、NO初始浓度等对脱除效率影响较大。微波功率的增大有利于NO的脱除和NO向N2的转化,NO初始浓度的增加降低了体系的微波脱硝效率,但N2总是最主要的产物。O自由基对NO去除和NO向N2的转化基本没有影响,N自由基的存在有利于NO去除和NO向N2的转化,有N无O有利于NO去除和N2选择性的提高。

Numerical simulation study on the removal of NO by microwave discharge

Experiments for studying microwave discharge decomposition of NO from simulated flue gas were investigated numerically according to corresponding chemical reaction dynamics equations,while various influencing factors on the removal efficiencies of NO and selectivity of N2 analyzed.Studying results show that in(NO+He) system almost all NO can be converted to N2.Calculated results show that the microwave power,NO initial concentration have a significant influence on the removal efficiency of NO and conversion of NO to N2.As the microwave power was increased,the removal efficiency of NO and selectivity of N2 increased too.On the other hand as NO initial concentration was increased,the removal efficiency of NO decreased,and N2 always is the main product.O radicals has against effect on the removal efficiency of NO and conversion of NO to N2,and N radicals has promoting effect on them.With N but no O radicals help improve the removal efficiency of NO and conversion of NO to N2.