Tran Luc-Sy, Glaude Pierre-Alexandre, Fournet René, Battin-Leclerc Frédérique
Laboratoire Réactions et Génie des Procédé, Université de Lorraine, CNRS, BP 20451, 1 rue Grandville, 54001 Nancy, France.
Energy Fuels. 2013 Apr 18;27(4):2226-2245. doi: 10.1021/ef301628x.
To better understand the chemistry of the combustion of ethanol, the structure of five low pressure laminar premixed flames has been investigated: a pure methane flame (φ=1), three pure ethanol flames (φ=0.7, 1.0, and 1.3), and an ethanol/methane mixture flames (φ=1). The flames have been stabilized on a burner at a pressure of 6.7 kPa using argon as dilutant, with a gas velocity at the burner of 64.3 cm/s at 333 K. The results consist of mole fraction profiles of 20 species measured as a function of the height above the burner by probe sampling followed by online gas chromatography analyses. A mechanism for the oxidation of ethanol was proposed. The reactions of ethanol and acetaldehyde were updated and include recent theoretical calculations while that of ethenol, dimethyl ether, acetone, and propanal were added in the mechanism. This mechanism was also tested against experimental results available in the literature for laminar burning velocities and laminar premixed flame where ethenol was detected. The main reaction pathways of consumption of ethanol are analyzed. The effect of the branching ratios of reaction CHOH+OH→Products+HO is also discussed.
为了更好地理解乙醇燃烧的化学过程，研究了五种低压层流预混火焰的结构：一个纯甲烷火焰（φ = 1）、三个纯乙醇火焰（φ = 0.7、1.0和1.3）以及一个乙醇/甲烷混合火焰（φ = 1）。这些火焰在燃烧器上以6.7 kPa的压力使用氩气作为稀释剂进行稳定，在333 K时燃烧器处的气体流速为64.3 cm/s。结果包括通过探针采样并随后进行在线气相色谱分析测量的20种物质的摩尔分数分布，该分布是作为燃烧器上方高度的函数。提出了乙醇氧化的机理。更新了乙醇和乙醛的反应，包括最近的理论计算，同时在该机理中添加了乙烯醇、二甲醚、丙酮和丙醛的反应。还针对文献中关于层流燃烧速度和检测到乙烯醇的层流预混火焰的实验结果对该机理进行了测试。分析了乙醇消耗的主要反应途径。还讨论了反应CHOH + OH→产物 + HO的分支比的影响。
