物理化学学报 >> 1985, Vol. 1 >> Issue (03): 249-257.doi: 10.3866/PKU.WHXB19850309

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四氢萘(C10H12)热解反应动力学研究

杨晓林; 杨惠星; 韩德刚   

  1. 北京大学化学系
  • 收稿日期:1984-10-19 修回日期:1984-12-24 发布日期:1985-06-15

KINETICS AND MECHANISM OF THERMOLYSIS OF TETRALIN

Yang Xiaolin; Yang Huixing; Han Degang   

  1. Chemistry Department Peking University
  • Received:1984-10-19 Revised:1984-12-24 Published:1985-06-15

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摘要： 本文在385—485 ℃、压力约100 atm条件下对四氢萘热解反应动力学进行研究。热解产物的定性鉴定表明, 四氢萘主要发生脱氢反应生成萘和异构化反应生成甲基茚满。由α-C_B-C键断裂生成丁基苯反应则较少。反应产物中还有少量茚满、甲苯、乙苯等, 它们分别来自甲基茚满和正丁基苯的进一步裂解。
本文对复杂的四氢萘热解反应作了定量处理, 进行了较详细的动力学研究,求得了相应的速率常数、活化能和指前因子。
在实验结果基础上, 借助热化动力学计算, 参考一些文献结果, 提出了四氢萘热解反应机理。由该机理出发所得的各产物速率方程与实验结果基本吻合。

Abstract: The kinetics and mechanism of the thermolysis of tetralin, commonly used as a hydrogen donor in coal liquefaction, was studied under about 100 atm and within 385—485 ℃. Analysis of the products was carried out by G.C.with glass capillary column and F.I.D., G.C.-M.S., N.M.R.. The reaction was performed in a microreactor which was contructed by a small stainless steel tube. Dehydrogenation of tetralin to naphthylene and isomerization to l-methylindan were found to be dominate paths, while cracking of the C_B—C bound of tetralin to butyl benzene is subordinated. The small quantities of indan, toluene and ethylbenzene are believed to be derived from the further thermolysis of methyl indan and butylbenzene.
A detailed kinetic analysis was given and the kinetic parameters were obtained. Combined with the thermokinetics calculations, a mechanism of the tetralin thermolysis was suggested.