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吸附还原降低柴油机NOx和PM的微观反应动力学计算

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Keywords: 柴油机,稀燃吸附,浓燃还原,NOx,PM

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Abstract:

以BaO(s1)为第1吸附位,Pt(s2)为第2吸附位,采用Chekmin软件对吸附还原脱除柴油机NOx和PM的微观反应动力学过程进行了模拟计算,结果表明:稀燃阶段气相NO(g)、NO2(g)以NO2(s1)、NO2NO3(s1)、NO3(s1)形式储存在BaO表面;浓燃阶段NOx中的N原子相互结合,形成的N2分子被脱附,C(S)与活性氧O*进行表面反应。稀燃运行时间和比值大小、发动机排温及排气中氧浓度对NOx和PM的去除有较大影响。

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