Lin Z K, Han D L, Li S F, Li Y Y, Yuan T
Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
J Chem Phys. 2009 Apr 21;130(15):154306. doi: 10.1063/1.3109687.
Intermediates in a fuel-rich premixed laminar 1,2-dimethoxyethane (DME) flame are studied by molecular beam mass spectrometry combined with tunable synchrotron vacuum ultraviolet photoionization. About 30 intermediate species are identified in the present work, and their mole fraction profiles are evaluated. The experimental results show that the formations of intermediates, both hydrocarbons and oxygenated hydrocarbons, are closely linked to the structure of fuel, which is consistent with the previous reports. Species produced from H atom abstraction and beta scission of DME usually have much higher concentrations than others. The oxygen atoms in DME are considered to act as partitions of the primary intermediates; therefore farther reactions among these primary intermediates are difficult to occur, resulting in absence of most large intermediate species.
通过分子束质谱结合可调谐同步辐射真空紫外光电离技术，对富燃料预混层流1,2 - 二甲氧基乙烷（DME）火焰中的中间体进行了研究。在本工作中鉴定出约30种中间体，并评估了它们的摩尔分数分布。实验结果表明，烃类和含氧烃类中间体的形成都与燃料结构密切相关，这与之前的报道一致。由DME的H原子提取和β断裂产生的物种通常比其他物种具有更高的浓度。DME中的氧原子被认为是初级中间体的分隔物；因此，这些初级中间体之间进一步的反应很难发生，导致大多数大分子中间体物种不存在。
