Experimental and modeling studies of small typical methyl esters pyrolysis: Methyl butanoate and methyl crotonate
Experimental and modeling studies of small typical methyl esters pyrolysis: Methyl butanoate and methyl crotonate
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小型典型甲酯热解的实验和模型研究：丁酸甲酯和巴豆酸甲酯
DOI：
10.1016/j.combustflame.2017.12.033
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发表时间：
2018-05
影响因子：
4.4
通讯作者：
Lidong Zhang
中科院分区：
文献类型：
--
作者：
Yitong Zhai;Beibei Feng;Wenhao Yuan;Chengcheng Ao;Lidong Zhang
为了详细考察碳双键对生物柴油燃烧化学的影响，研究了丁酸甲酯（MB）和巴豆酸甲酯（MC）两种C4脂肪酸甲酯（FAME）。这两个FAME在30，150和780托的热解实验进行了在773-1323 K的温度范围内的流动反应器中，使用气相色谱-质谱。大量的热解物种，包括C1至C4烃，含氧产物，酯和芳烃的观察和鉴定。开发了MB和MC燃烧的综合动力学模型，并应用于新的实验数据进行验证。在这项工作中，苯的峰值摩尔分数，以及其他不饱和烃在MC热解，被发现是在稍高的量相比，MB。动力学模拟分析表明，苯的主要生成途径是炔丙基自由基的自结合反应。此外，该模型还与以前的实验数据进行了验证MB和MC燃烧，包括在射流搅拌反应器中的氧化，在激波管中的热解和层流预混火焰。研究表明，碳双键的FAME中的碳双键的影响可能会导致在整个热分解过程中的初始PAH和碳烟前体的增长趋势。
In order to examine in detail the effect of C double bond C bond on the combustion chemistry of biodiesel fuels, two C4 fatty acid methyl esters (FAMEs) were investigated, namely methyl butanoate (MB) and methyl crotonate (MC). Pyrolysis experiments of these two FAMEs at 30, 150 and 780 Torr were conducted in a flow reactor over the temperature range of 773–1323 K, using gas chromatography-mass spectrometry. A number of pyrolysis species including C1 to C4 hydrocarbons, oxygenated products, esters and aromatics were observed and identified. A comprehensive kinetic model for MB and MC combustion was developed, and applied to validate against the new experimental data. In this work, peak mole fraction of benzene, as well as other unsaturated hydrocarbons in MC pyrolysis, was found to be in slightly higher amounts in comparison with that of MB. Kinetic modeling analysis revealed that the dominant formation pathway of benzene was the self-combination reaction of propargyl radical. Furthermore, the model was also validated against the previous experimental data on MB and MC combustion, including oxidation in jet stirred reactor, pyrolysis in shock tube and laminar premixed flame. This study suggests that the effect of C double bond C double bond in FAMEs might give rise to a growing tendency of initial PAH and soot precursors in the whole thermal decomposition process.
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影响因子：
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作者：
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发表时间：
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期刊：
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影响因子：
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作者：
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