本文利用同步辐射真空紫外光电离质谱(SVUV-PIMS)技术研究了当量比为2.2的掺杂不同比例CO2的富燃乙烯低压层流预混火焰.发展了一个包含176个物种和642步反应的乙烯掺杂CO2的燃烧动力学模型.结果表明,反应CO+OH=CO2+H在掺杂CO2的火焰中对多环芳烃(PAH)的减少起着决定性的作用;随着掺杂CO2量的增加,1CH2、3CH2和CH等自由基的生成得到抑制,C2H2、C3H3和C4H4等碳黑前驱体生成也有所减少,因此推断后续产生的多环芳烃及碳黑等也将随着掺杂CO2量的增加而减少.
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