Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
J Phys Chem A. 2009 Mar 5;113(9):1800-6. doi: 10.1021/jp8098895.
Combustion intermediates of a cyclic oxygenated hydrocarbon, 1,4-dioxane, were studied with the tunable synchrotron vacuum ultraviolet photoionization and molecular-beam mass spectrometry (MBMS) technique. A fuel-rich premixed laminar 1,4-dioxane/O(2)/Ar flame at low pressure with an equivalence ratio of 1.80 was investigated in the present work. A total of 20 intermediates were observed, and their mole fraction profiles are calculated. Aromatic intermediates were not observed, and this was a prominent difference between the fuel-rich flames of 1,4-dioxane and previously studied noncyclic oxygenated hydrocarbons. The fuel-rich 1,4-dioxane flame could be divided into four zones, and formation routes of the intermediates were proposed. The discussion on the pollutant emissions showed that some light toxic molecules were produced from 1,4-dioxane combustion; however, toxic aromatics and soot emissions were possibly avoided.
采用可调谐同步辐射真空紫外光电离和分子束质谱（MBMS）技术研究了环状含氧烃 1,4-二恶烷的燃烧中间体。本工作研究了低压富燃料预混层流 1,4-二恶烷/O2/Ar 火焰，当量比为 1.80。共观察到 20 种中间体，并计算了它们的摩尔分数分布。未观察到芳香族中间体，这是富燃料 1,4-二恶烷火焰与先前研究的非环状含氧烃的显著区别。富燃料 1,4-二恶烷火焰可分为四个区域，并提出了中间体的形成途径。关于污染物排放的讨论表明，一些轻毒性分子是由 1,4-二恶烷燃烧产生的；然而，可能避免了有毒芳香族化合物和烟尘的排放。
