The structures of three laminar premixed stoichiometric flames at low pressure (6.7 kPa): a pure methane flame, a pure ethanol flame, and a methane flame doped by 30% of ethanol, have been investigated and compared. The results consist of mole fraction profiles of CH4, C2H5OH, O2, Ar, CO, CO2, H2O, H2, C2H6, C2H4, C2H2, C3H8, C3H6, CH3-C CH (propyne), CH2 C CH2 (allene), CH2O, and CH3HCO, measured as a function of the height above the burner by probe sampling followed by on-line gas chromatography analyses. Flame temperature profiles have been also obtained by using a PtRh thermocouple. The similarities and differences between the three flames have been analyzed. The results show that, in these three flames, the mole fraction of the intermediates with two carbon atoms is much larger than that of the species with three carbon atoms. In general, the mole fraction of all intermediate species in the pure ethanol flame is the largest, followed by the doped flame, and finally the pure methane flame.

中文翻译：

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乙醇/甲烷/氧气/氩层流预混火焰结构实验研究


对低压（6.7 kPa）下纯甲烷火焰、纯乙醇火焰和掺杂30%乙醇的甲烷火焰三种层流预混化学计量火焰的结构进行了研究和比较。结果包括 CH4、C2H5OH、O2、Ar、CO、CO2、H2O、H2、C2H6、C2H4、C2H2、C3H8、C3H6、CH3-C CH（丙炔）、CH2 C CH2（丙二烯）、CH2O 的摩尔分数分布和 CH3HCO，通过探针取样和在线气相色谱分析作为燃烧器上方高度的函数进行测量。火焰温度分布也可以通过使用 PtRh 热电偶获得。分析了三种火焰之间的异同。结果表明，在这三种火焰中，两个碳原子中间体的摩尔分数远大于三个碳原子中间体的摩尔分数。一般来说，纯乙醇火焰中所有中间物种的摩尔分数最大，其次是掺杂火焰，最后是纯甲烷火焰。