This work aims to investigate the slow pyrolysis of sunflower seed residues using thermogravimetric tests carried out at five heating rates: 5, 10, 15, 20, and 25 K min⁻¹. The kinetic triplet for global reaction, represented by activation energy (\({E}_{a}\)), Arrhenius pre-exponential factor (A), and reaction mechanism (\(f\left(\alpha \right))\), and the kinetic parameters for pseudo-components were determined. Thermodynamic activation parameters as enthalpy, Gibbs free energy, and entropy were calculated by using the transition state theory. The \({E}_{a}\) values determined by isoconversional methods varied between 79.11 and 162.57 kJ mol⁻¹, and the master plots methodology indicated the reaction mechanism of sunflower seed residues as the three-dimensional Jader equation, resulting in global parameters of 102.51 kJ mol⁻¹ and 8.96 × 10⁵ s⁻¹ for \({E}_{a}\) and A, respectively. The presence of three pseudo-components (hemicelluloses, cellulose, and lignin) was considered for the modeling of independent parallel reactions, which resulted in \({E}_{a}\) values ranging from 72.4 to 170.2 kJ mol⁻¹ and the A values ranging from 1.31×10⁴ mol⁻² s⁻¹ to 1.21×10¹³ mol⁻¹ s⁻¹, with reaction orders varying between 1 and 3. The values of thermodynamic parameters indicated that the pyrolysis of sunflower residues tends to remain continuous once the necessary energy is supplied and that the activated state presented a higher degree of organization than the reactants. This present work is the first one to investigate the kinetic triplet and the independent parallel reaction model for sunflower residue pyrolysis. The results were useful for biomass management, indicating the kinetic and thermodynamic values for pyrolysis optimization.

这项工作旨在使用在五个加热速率下进行的热重测试来研究葵花籽残留物的缓慢热解：5、10、15、20 和 25 K min ^-1。全局反应的动力学三元组，由活化能 ( \({E}_{a}\) )、Arrhenius 指前因子 ( A ) 和反应机理 ( \(f\left(\alpha \right))表示\)，并确定了伪组分的动力学参数。使用过渡态理论计算热力学活化参数，如焓、吉布斯自由能和熵。由等转化方法确定的\({E}_{a}\)值在 79.11 和 162.57 kJ mol ^{-1之间变化}，并且主图方法将葵花籽残留物的反应机理表示为三维 Jader 方程，导致^\ ( ^{{ E }} _{ a } \)和A，分别。三个假组分（半纤维素、纤维素和木质素）的存在被考虑用于独立平行反应的建模，这导致\({E}_{a}\)值范围为 72.4 至 170.2 kJ mol ^-1和A值范围为1.31×10 4 ^mol -2 ^s -1^至1.21×10 ¹³ mol^-1 s ^-1，反应级数在 1 和 3 之间变化。热力学参数值表明，一旦提供了必要的能量，向日葵残渣的热解趋于保持连续，并且活化状态呈现出更高的组织程度。反应物。本工作是第一个研究向日葵残渣热解的动力学三重态和独立平行反应模型的工作。结果对生物质管理很有用，表明了热解优化的动力学和热力学值。