The thermochemical transformation of biomass is necessary to obtain renewable and non-polluting energy. However, the development of models is required to overcome the discrepancy in the kinetic triplet values obtained by the model-free and model-fitting methods. The present work proposes a novel methodology for determining the kinetic triplet and the rate law based on deconvolution with Fraser Suzuki (F-S) functions and applying a modified multiple linear regression. Thermogravimetric tests were carried out in N2 on raw rice husk samples, leached and impregnated with an Fe/Ce catalyst. The new methodological proposal allows us to find the rate laws that model the experimental data with appropriate adjustments and explain the thermal parameters and activation energies found by typical isoconversional methods. Deconvolution with F-S functions was carried out in three pseudo-components. The kinetic triplet was determined, and rate laws were proposed for raw rice husks leached in an acidic, aqueous medium and with a catalyst, obtaining adjustments greater than 95.5 % of the values reported in the literature for rice husks and other types of lignocellulosic biomass. The isoconversional apparent activation energy varied between 176 and 190 kJmol-1 with a significant uncertainty. Concurrently, the Kissinger apparent activation energy varied between 152 and 169 kJmol-1. On the other hand, the catalytic effect of Fe/Ce on the pyrolysis of P-Lig generated a reduction of 16 kJ mol−1.

中文翻译：

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浸出和催化分解对稻壳热解动力学和热力学的影响


生物质的热化学转化对于获得可再生和无污染的能源是必要的。然而，需要开发模型来克服通过无模型和模型拟合方法获得的动力学三元组值的差异。这项工作提出了一种新的方法，用于确定动力学三元组和速率定律，该方法基于 Fraser Suzuki （F-S） 函数的反卷积并应用改进的多元线性回归。在 N2 中对生稻壳样品进行热重测试，浸出并用 Fe/Ce 催化剂浸渍。新的方法论提议使我们能够找到对实验数据进行建模的速率定律，并解释通过典型的等转换方法找到的热参数和活化能。使用 F-S 函数进行反卷积是在三个伪组件中进行的。确定了动力学三元组，并提出了在酸性、水性介质中用催化剂浸出的生稻壳的速率定律，获得了大于文献中报道的稻壳和其他类型的木质纤维素生物质值的 95.5% 的调整。等转化表观活化能在 176 和 190 kJmol-1 之间变化，具有显著的不确定性。同时，基辛格表观活化能在 152 和 169 kJmol-1 之间变化。另一方面，Fe/Ce 对 P-Lig 热解的催化作用产生了 16 kJ mol-1 的还原。