The thermal decomposition of wood chips from an apple tree is studied in a static air atmosphere under isothermal conditions. Based on the thermogravimetric analysis, the values of the apparent activation energy and pre-exponential factor are 34 ± 3 kJ mol⁻¹ and 391 ± 2 min⁻¹, respectively. These results have also shown that this process can be described by the rate of the first-order chemical reaction. This reaction model is valid only for a temperature range of 250–290 °C, mainly due to the lignin decomposition. The obtained results are used for kinetic prediction, which is compared with the measurement. The results show that the reaction is slower at higher values of degree of conversion, which is caused by the influence of the experimental condition. Nevertheless, the obtained kinetic parameters could be used for the optimization of the combustion process of wood chips in small-scale biomass boilers.

中文翻译：

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苹果树上木片热分解的等温动力学分析

在等温条件下的静态空气气氛中研究了苹果树上木片的热分解。根据热重分析，表观活化能和指数前因子的值为34±3 kJ mol ^-1和391±2 min ^-1， 分别。这些结果还表明该过程可以通过一级化学反应的速率来描述。该反应模型仅在250–290°C的温度范围内有效，这主要是由于木质素分解所致。将获得的结果用于动力学预测，并将其与测量结果进行比较。结果表明，在较高的转化度值下，反应较慢，这是由于实验条件的影响所致。尽管如此，所获得的动力学参数仍可用于优化小型生物质锅炉中木片的燃烧过程。