四氢萘(C10H12)热解反应动力学研究

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。

KINETICS AND MECHANISM OF THERMOLYSIS OF TETRALIN

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.