This work addresses the gas formation mechanisms for paraffinic-type mineral oil and soybean-based natural ester with a predominantly linoleic fatty acid under thermal faults. Based on a literature review, possible decomposition paths due to pyrolysis are proposed. A case study of hot spots of different temperatures is presented and its results are compared and analyzed with the gas profiles of the IEEE C57.155-2014 guide. The results obtained for both cases are consistent with the proposed mechanisms. For the same thermal fault, the gas profiles are different. The natural ester presents significant proportions of ethane and carbon dioxide concerning mineral oil. For temperature faults above 700 °C, the behavior of the chemical structures of the natural ester is similar to the carbon structures of the mineral oil and is subject to similar reactions. Therefore, the major differences in the gases generated for thermal faults are at low temperatures.

中文翻译：

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热故障造成的矿物油和天然酯液体中的溶解气体分析


这项工作解决了热断层下石蜡型矿物油和以亚油酸为主的大豆天然酯的气体形成机制。根据文献综述，提出了热解可能的分解路径。提出了不同温度热点的案例研究，并将其结果与 IEEE C57.155-2014 指南的气体剖面进行了比较和分析。两种情况获得的结果与所提出的机制一致。对于同一热故障，气体剖面是不同的。与矿物油相比，天然酯中含有相当大比例的乙烷和二氧化碳。对于高于 700 °C 的温度故障，天然酯的化学结构的行为与矿物油的碳结构相似，并且会发生类似的反应。因此，热故障产生的气体的主要差异是在低温下。