Abstract The combustion mechanisms and characteristics of gel fuels and of combustible liquids in a normal state are different. Therefore, in this paper, the kinetic properties of gas-phase combustion of gel fuel evaporation products have been determined using the data of thermogravimetric analysis (TG) and differential thermal analysis (DTA) at the experimental sample heating rates of 5, 15 and 30 °C per minute. It was prepared a group of oil-filled cryogels (with 40, 50, and 60 vol% of oil) based on the aqueous solution of polyvinyl alcohol (10 wt%). The value of activation energy 13.8 kJ mol–1 has been established for the combustion of oil-filled cryogels using the Friedman method. The thermal effects of these processes, measured using a calorimeter, are 41.78–43.34 MJ kg–1, which is 5–8% lower than the thermal effect of the combustion of oil in a normal state. It has been shown that the kinetic properties of the gas-phase combustion of gel fuels based on oil-filled cryogels are significantly different from the identical characteristics of the combustion of oils in a normal state. At the gas-phase combustion stage, the TG curves for the oil-filled cryogel and for oil in a normal state look similar, but the rate of mass change of the latter is much higher as a result of burnout.

中文翻译：

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基于充油冷冻凝胶的凝胶燃料气相燃烧动力学特性

摘要 凝胶燃料与正常状态下可燃液体的燃烧机理和特性是不同的。因此，本文利用热重分析（TG）和差热分析（​​DTA）的数据，在实验样品加热速率为5、15和30的条件下，确定了凝胶燃料蒸发产物气相燃烧的动力学特性。 ℃/分钟。以聚乙烯醇（10 wt%）的水溶液为基础，制备了一组充油冷冻凝胶（含油量为40、50和60 vol%）。已使用弗里德曼方法确定了充油冷冻凝胶燃烧的活化能值为 13.8 kJ mol-1。使用热量计测量的这些过程的热效应为 41.78–43.34 MJ kg–1，这比正常状态下油燃烧的热效应低5-8%。已经表明，基于充油冷冻凝胶的凝胶燃料的气相燃烧动力学特性与正常状态下油类燃烧的相同特性显着不同。在气相燃烧阶段，充油冷冻凝胶和正常状态的油的TG曲线看起来相似，但后者由于燃尽而质量变化率要高得多。