Rubber seed oil (RSO) is a non-edible oil extracted from a by-product of the rubber industry (rubber seed), which is a potentially renewable resource that can be converted into various fuels/fuel precursors and high-value chemicals through pyrolysis. In the current work, the pyrolysis kinetics, thermodynamics, product characteristics and reaction mechanism of RSO were comprehensively investigated by a thermogravimetric analyzer and a down tube reactor. Two model-free methods (Flynn-Wall-Ozawa method and Kissinger-Akahira-Sunose method) were used to calculate the apparent activation energy at different conversion rates, which were distributed between 176.77 and 292.57 kJ/mol. The apparent activation energy of RSO was calculated using the model-fitting methods based on 16 commonly used models, and the results varied greatly by different models. The 1.5-order of reaction can well explain the pyrolysis process of RSO. The analysis of pyrolysis products showed that the gas products were mainly CO₂, CO, H₂ and CH₄ and other small molecules of hydrocarbons, liquid products mainly contained alkanes, alkenes, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and other oxygenated organics, the microscopic morphology of coke was spherical carbon particles with different sizes. Finally, the pyrolysis mechanism of RSO was discussed based on the information of the products. These findings will provide helpful information for the design of pyrolytic process using rubber seed oil as a feedstock.

橡胶籽油 (RSO) 是从橡胶工业的副产品（橡胶籽）中提取的非食用油，它是一种潜在的可再生资源，可以通过热解转化为各种燃料/燃料前体和高价值化学品. 在目前的工作中，通过热重分析仪和下管反应器对RSO的热解动力学、热力学、产物特性和反应机理进行了综合研究。使用两种无模型方法（Flynn-Wall-Ozawa 方法和 Kissinger-Akahira-Sunose 方法）计算不同转化率下的表观活化能，其分布在 176.77 和 292.57 kJ/mol 之间。基于16种常用模型的模型拟合方法计算了RSO的表观活化能，结果因模型而异。1.5级反应可以很好地解释RSO的热解过程。热解产物分析表明，气体产物主要是CO₂、CO、H ₂和CH ₄等小分子烃类，液态产物主要含有烷烃、烯烃、单环芳烃、多环芳烃等含氧有机物，焦炭微观形貌为大小不一的球形碳颗粒。最后，根据产物信息讨论了RSO的热解机理。这些发现将为使用橡胶籽油作为原料的热解工艺设计提供有用的信息。