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本文在385—485℃、压力约100atm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a-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。
In this paper, pyrolysis reaction kinetics of tetralin was studied at 385-485 ℃ and pressure of about 100atm. The qualitative identification of pyrolysis products showed that tetralin mainly undergoes dehydrogenation reaction to generate naphthalene and isomerization reaction to produce methylindan. A-C_B-C bond cleavage to generate butylbenzene reaction is less. A small amount of indan, toluene, ethylbenzene and the like are present in the reaction product, which are derived from further decomposition of methylindane and n-butylbenzene, respectively. In this paper, the complex pyrolysis of tetrahydronaphthalene was quantitatively studied. The kinetics of the reaction was studied in detail. The corresponding rate constants, activation energies and pre-exponential factors were obtained. On the basis of the experimental results, with the aid of the thermodynamic calculation, some pyrolysis reactions of tetrahydronaphthalene are proposed with reference to some literature results. The rate equations of each product obtained from this mechanism basically agree with the experimental results.