吡咯和吡啶火焰中含氮燃烧中间体的探测  

Detection of intermediates formed in nitrogen-containing compounds flames

作　　者：张清[1] 田振玉[2] 李玉阳[2] 张泰昌 王晶[2] 齐飞[2] 

机构地区：[1]安徽工业大学数理学院,安徽马鞍山243002 [2]中国科学技术大学国家同步辐射实验室,安徽合肥230029

出　　处：《中国科学技术大学学报》2006年第7期793-796,共4页JUSTC

基　　金：国家自然科学基金(20473081和20533040);中国科学院创新方向性项目;教育部博士点基金资助

摘　　要：利用同步辐射(SR)和分子束质谱(MBMS)研究了两种含氮燃料(吡咯和吡啶)分别在贫燃和富燃条件下的4个低压预混火焰.通过测量光电离质谱和扫描光电离效率谱(PIE),鉴别了火焰中的燃烧中间体的化学结构.结果表明在富燃火焰中容易产生乙炔(C2H2),而在贫燃火焰中则更容易形成一氧化氮(NO)/甲醛(HCHO).在4个火焰中同时观察到了HCN、C2H4、C3H4、C2H2O、HNCO、C3HN、C3H3N、C3H5N、C4H3N和C6H6等稳定中间体以及CH3、C3H3和C2H2N等自由基.Four premixed pyrrole and pyridine flames were investigated with tunable synchrotron photoionization and molecular-beam mass spectrometry. Chemical structures of flame intermediates were identified by measurements of photoionization mass spectrometry and photoionization efficiency （PIE） spectra. The results indicate that acetylene is a dominant intermediate in fuel-rich flames whereas nitric oxide and formaldehyde have significant concentration in fuel-lean flames. Stable intermediates, such as HCN, C2H4, C3H4, C2H2O, HNCO, C3HN, C3H3N, C3H5N, C4H3N and C6H6, and radicals like CH3, C3 H3 and C2 H2N are observed in the four flames.

关 键 词：吡咯 吡啶 低压预混火焰 同步辐射 分子柬质谱 

分 类 号：O643.21[理学—物理化学]