Bax Sarah, Hakka Mohammed Hichem, Glaude Pierre-Alexandre, Herbinet Olivier, Battin-Leclerc Frédérique
Laboratoire Réactions et Génie des Procédés, Nancy Université, CNRS, ENSIC, BP 20451, 1 rue Grandville, 54001 Nancy, France.
Combust Flame. 2010 Jun;157(6):1220-1229. doi: 10.1016/j.combustflame.2009.12.008.
The experimental study of the oxidation of a blend containing n-decane and a large unsaturated ester, methyl oleate, was performed in a jet-stirred reactor over a wide range of temperature covering both low and high temperature regions (550-1100 K), at a residence time of 1.5 s, at quasi atmospheric pressure with high dilution in helium (n-decane and methyl oleate inlet mole fractions of 1.48 × 10 and 5.2 × 10) and under stoichiometric conditions. The formation of numerous reaction products was observed. At low and intermediate temperatures, the oxidation of the blend led to the formation of species containing oxygen atoms like cyclic ethers, aldehydes and ketones deriving from n-decane and methyl oleate. At higher temperature, these species were not formed anymore and the presence of unsaturated species was observed. Because of the presence of the double bond in the middle of the alkyl chain of methyl oleate, the formation of some specific products was observed. These species are dienes and esters with two double bonds produced from the decomposition paths of methyl oleate and some species obtained from the addition of H-atoms, OH and HO radicals to the double bond. Experimental results were compared with former results of the oxidation of a blend of n-decane and methyl palmitate performed under similar conditions. This comparison allowed highlighting the similarities and the differences in the reactivity and in the distribution of the reaction products for the oxidation of large saturated and unsaturated esters.
在喷射搅拌反应器中，对含有正癸烷和一种大型不饱和酯（油酸甲酯）的混合物进行了氧化实验研究。实验在很宽的温度范围内进行，涵盖了低温和高温区域（550 - 1100 K），停留时间为1.5秒，在准大气压下，用氦气进行高稀释（正癸烷和油酸甲酯的入口摩尔分数分别为1.48×10和5.2×10），且处于化学计量条件下。观察到了众多反应产物的形成。在低温和中温下，混合物的氧化导致形成了含有氧原子的物种，如源自正癸烷和油酸甲酯的环醚、醛和酮。在较高温度下，不再形成这些物种，而是观察到了不饱和物种的存在。由于油酸甲酯的烷基链中间存在双键，观察到了一些特定产物的形成。这些物种是由油酸甲酯的分解路径产生的二烯和具有两个双键的酯，以及一些通过氢原子、羟基和氢氧自由基加成到双键上而得到的物种。将实验结果与在类似条件下进行的正癸烷和棕榈酸甲酯混合物氧化的先前结果进行了比较。这种比较突出了大型饱和酯和不饱和酯氧化反应性和反应产物分布方面的异同。
