Speciation studies of methyl butanoate ignition

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• 作者：Stephen M. Walton<sup>asup> ; Darshan M. Karwat<sup>bsup> ; Paul D. Teini<sup>asup> ; Adrienne M. Gorny<sup>asup> ; Margaret S. Wooldridge<sup>asup><sup> ; sup><sup>bsup><sup> ; sup><sup>mswool@umich.edusup>
• 关键词：Methyl butanoate ; Ignition ; Rapid compression facility
• 刊名：Fuel
• 出版年：2011
• 出版时间：May 2011
• 年：2011
• 卷：90
• 期：5
• 页码：1796-1804
• 全文大小：846 K

文摘

The current work presents the results of an experimental study of the intermediates formed during ignition of methyl butanoate (C<sub>5sub>H<sub>10sub>O<sub>2sub>) and air mixtures. A rapid-sampling system and the University of Michigan rapid compression facility were used to acquire gas samples at conditions of P = 10.2 atm and T = 985 K using mixtures of χ<sub>mbsub> = 0.96 % , χ<sub>O<sub>2sub>sub> = 20.79 % , χ<sub>N<sub>2sub>sub> = 52.89 % , and χ<sub>Arsub> = 25.25 % (mole fraction, percent basis); corresponding to  = 0.30 and an inert gas to O<sub>2sub> molar ratio of 3.76. The samples were analyzed using gas chromatography. Quantitative measurements of mole fraction time-histories of methane, ethane, propane, ethene, propene, and 1-butene are compared with model predictions based on a reaction mechanism developed in previous work. The methane and ethene time-histories are in excellent agreement (within 20 % ), while propene and ethane are underpredicted by the model. Sensitivity analysis shows ignition is controlled primarily by competition between H<sub>2sub>O<sub>2sub> and HO<sub>2sub> kinetics at these conditions. Reaction path analysis shows the methyl butanoate fuel consumption is dominated by H-atom abstraction by OH.