Understanding the combustion of methyl esters is crucial to elucidate kinetic pathways and predict combustion parameters, soot yields, and fuel performance of biodiesel, however most kinetic studies of methyl esters have focused on smaller, surrogate model esters. Methyl hexanoate is a larger methyl ester approaching the chain length of methyl esters found in biodiesel and has not received as much research attention as other smaller esters. The purpose of this work is to present the first atmospheric pressure combustion data of methyl hexanoate, CH₃CH₂CH₂CH₂CH₂COOCH₃. Mixtures of 2% methyl hexanoate in O₂ and N₂ are studied using a plug flow reactor at atmospheric pressure, wall temperatures from 573 to 973 K, residence times from roughly 1-2 s., and fuel equivalence ratios of 1, 1.5, and 2. Exhaust gases are analyzed by a gas chromatograph-mass spectrometer system and species mole fractions are presented. The literature model shows satisfactory agreement with the experimental species profiles and improvements for future mechanistic studies are suggested. In particular, this work proposes new unimolecular decomposition pathways of methyl hexanoate to form methanol or methyl acetate. Furthermore, the experiment detected three unsaturated esters that are direct products of the low temperature oxidation chemistry and it provides more insight into branching ratios for the formation of methyl hexanoate radicals and for the decomposition of hydroperoxyalkyl radicals.

了解甲酯的燃烧对于阐明动力学路径和预测生物柴油的燃烧参数，烟灰收率和燃料性能至关重要，但是大多数甲酯的动力学研究都集中在较小的替代模型酯上。己酸甲酯是一种较大的甲酯，接近生物柴油中发现的甲酯的链长，因此没有像其他较小的酯那样受到广泛的研究关注。这项工作的目的是介绍己酸甲酯CH ₃ CH ₂ CH ₂ CH ₂ CH ₂ CH ₂ COOCH ₃的第一大气压燃烧数据。O ₂和N ₂中2％己酸甲酯的混合物我们在大气压力，壁温从573至973 K，停留时间约1-2 s，燃料当量比为1、1.5和2的条件下使用活塞流反应器进行了研究。通过气相色谱仪分析了废气-介绍了质谱仪系统和物质的摩尔分数。文献模型显示出与实验物种概况令人满意的一致性，并提出了对未来机理研究的改进建议。特别地，这项工作提出了己酸甲酯形成甲醇或乙酸甲酯的新的单分子分解途径。此外，