Energy absorption and reaction mechanism for thermal pyrolysis of n-decane under supercritical pressure
Energy absorption and reaction mechanism for thermal pyrolysis of n-decane under supercritical pressure
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DOI：
10.1016/j.applthermaleng.2016.10.057
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发表时间：
2017-02
影响因子：
6.4
通讯作者：
Hao Zhou;X. Gao;P. Liu;Quan Zhu;Jianli Wang;Xiongjian Li
中科院分区：
文献类型：
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作者：
Hao Zhou;X. Gao;P. Liu;Quan Zhu;Jianli Wang;Xiongjian Li
在这项工作中，通过实验和数值研究了温和热裂解正癸烷的行为。采用开发的电加热管实验方法分析了正癸烷在不同温度和压力下的热裂解情况。结果表明，在12%的低裂解转化率下，所有裂解产物的选择性近似等于恒定值。建立了由11种物质组成的温和裂解癸烷的一步全局反应模型，并开发了一种新颖的在线密度测量方法，以提高停留时间计算的精度，从而提高动力学参数。通过Chemkin程序将实验结果与模拟值进行比较，偏差小于10%，证实了反应模型的可靠性。对热裂解正癸烷的化学吸热器进行了评估，结果表明，即使在低转化率下，化学吸热反应提供的热量吸收也是不可忽略的。
In this work, the behavior of mild thermal crackingn-decane was investigated experimentally and numerically. A developed experimental method of electrical heating tube was used to analyze the thermal cracking ofn-decane under various temperatures and pressures. The results showed that, at low cracking conversion of 12%, the selectivities of all cracked products are approximately equal to constant values. A one-step global reaction model consisting of 11 species was established for mild-crackingn-decane and a novel on-line density measurement method was developed to improve the precision of residence time calculation, thus the kinetics parameters. The reliability of the reaction model was confirmed through comparing the experimental results with simulated values by using Chemkin program with the deviation less than 10%. The chemical heat sink of thermal crackingn-decane was evaluated and the result showed that the heat absorption provided by chemical endothermic reactions is unnegligible even at low conversion.