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环境化学  2015 

介质阻挡放电(DBD)诱导低温等离子体预氧化NO

Keywords: 低温等离子体,预氧化,NO2/NO比例,NOx转化率

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Abstract:

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,NO2/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,NO2/NO比例增加而NOx转化率降低;控制气氛中C3H6和O2的浓度可使NO2/NO比例达到1,从而提高SCR系统还原NOx的能力.

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