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中文摘要：
利用介质阻挡放电产生低温等离子体预氧化C3H6／NO／N2／O2混合气中NO，分析了NO的转化机理，研究了放电功率、C3H6初始浓度和O2浓度对NO2／NO比例以及NOx转化率的影响．研究结果表明，随着放电功率升高，NO浓度先降低后升高，NNO2／NO比例呈先升高后减小趋势，NOx转化率和N2O浓度持续升高；相同功率下，提高C3H6初始浓度可增加NO2／NO比例和NOx转化率；随着O2浓度增加，NNO2／NO比例增加而NO；转化率降低；控制气氛中C3H6和O2的浓度可使NNO2／NO比例达到1，从而提高SCR系统还原NOx的能力．
英文摘要：
Non-thermal plasma produced by dielectric barrier discharge was used to pro-oxidize NO in C3H6/NO/N2O2 mixture and NO conversion mechanism was analyzed. The influences of discharge power, C3 H6 initial concentration and O2 concentration on NO2/NO ratio and NOx conversion efficiency were also studied. The obtained results indicate that with the discharge power increasing, NO concentration decreases firstly and then increases, and NO/NO ratio increases firstly and then decreases. NOx conversion efficiency and N20 concentration rise. With the same discharge power, NO2/NO ratio and NOx conversion efficiency grow with the increasing of C3 H6 initial concentration, NO2/NO ratio rises and NOx conversion efficiency reduces with the increasing of O2 concentration. In addition, NO2/NO ratio could reach 1 by controlling C3 H6 and O2 concentration, which is benefit to NOx conversion with SCR system.
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