| 秦笑梅,陈亚培,方文军.化学通报,2019,82(2):158-162. |
| 直链烷烃的超临界热稳定性研究 |
| Thermal Stability of n-alkanes under Supercritical Condition |
| 投稿时间：2018-08-07 修订日期：2018-09-10 |
| DOI： |
| 中文关键词: 直链烷烃 热裂解 热稳定性 芳烃 |
| 英文关键词:n-Alkanes Thermal decomposition Thermal stability Aromatics |
| 基金项目:国家自然科学基金项目(21603193)、河南省科技攻关计划项目(172102210546)、郑州轻工业学院博士启动基金项目(2015BSJJ045)资助。 |
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| 中文摘要: |
| 本文考察了正辛烷、正壬烷、正癸烷、正十一烷和正十二烷等5种直链烷烃在超临界条件下的恒容热裂解，采用一级反应动力学简化描述其热裂解过程。跟踪裂解气液产物分布，探讨了液体产物中芳烃含量与热稳定性的关系。在相同反应条件下，奇数碳和偶数碳烷烃热裂解速率、转化率和液体组分中芳烃含量分别随碳数的增加而增加。芳烃产物含量随裂解转化率增加呈指数形式增加，表达了烷烃类化合物热稳定性和裂解变化的规律。 |
| 英文摘要: |
| The thermal decomposition for n-octane, n-nonane, n-decane, n-undecane, and n-dodecane under supercritical condition is investigated in a constant-volume reactor respectively. A simplifying assumption of the first-order reaction is used to describe the decomposition of the n-alkanes. The gaseous and liquid products of the thermal decomposition are monitored, and the relationship between the produced aromatics in the liquid residues and the thermal stability are investigated. At the same conditions of reaction temperature and time, the rate of thermal decomposition, the conversion, or the content of aromatic products increases with increasing the number of odd or even carbon atoms of alkanes, respectively. The produced aromatics increases exponentially with increasing the conversion of thermal decomposition，which reflects the regular changes of the thermal stability and decomposition severity of hydrocarbon fuels. |
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