In order to investigate interactions among biomass components on pyrolysis kinetics, pyrolysis experiments of individual components, synthetic biomass (designed by Design-Export software) and natural biomass (rice husk and corn straw) were conducted on a thermogravimetric analyzer (TGA). The results revealed that the pyrolysis behavior of cellulose is sharp, which is with low pyrolysis reaction order (1.38), high activation energy (168.61 kJ/mol) and high pre-exponential factor (3.50E+12/s). The pyrolysis behavior of hemicellulose and lignin is slower but more complicated, both with high pyrolysis reaction order (2.30, 1.51), low activation energy (126.31, 87.21 kJ/mol), and low pre-exponential factor (9.67E+09, 2.59E+05 /s). Comparison of the experimental and calculated kinetics of synthetic samples confirmed that interactive effects on pyrolysis kinetics exist in the co-pyrolysis process. In particular, the presence of lignin inhibited the pyrolysis reaction rate of synthetic biomass, and cellulose played the dominant role in the activation energy and frequency factor. The pyrolysis reaction order was strongly influenced by hemicellulose owing to its abundant and complex branched chains. The predicted model was also established for calculating kinetic parameters of natural biomass with known proportions of three components. The predicted results were consistent with the experimental ones, validating the effectiveness of the prediction model.

中文翻译：

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纤维素、半纤维素和木质素对生物质热解动力学的影响

为了研究生物质组分之间对热解动力学的相互作用，在热重分析仪 (TGA) 上进行了单个组分、合成生物质（由 Design-Export 软件设计）和天然生物质（稻壳和玉米秸秆）的热解实验。结果表明，纤维素的热解行为剧烈，具有低热解反应阶数（1.38）、高活化能（168.61 kJ/mol）和高指前因子（3.50E+12/s）。半纤维素和木质素的热解行为较慢但较复杂，均具有较高的热解反应阶数（2.30, 1.51）、较低的活化能（126.31, 87.21 kJ/mol）和较低的指前因子（9.67E+09, 2.59） E+05/s）。合成样品的实验和计算动力学的比较证实，在共热解过程中存在对热解动力学的交互影响。特别是木质素的存在抑制了合成生物质的热解反应速率，纤维素在活化能和频率因子中起主导作用。半纤维素由于支链丰富而复杂，热解反应顺序受其影响很大。还建立了预测模型，用于计算三组分已知比例的天然生物质的动力学参数。预测结果与实验结果一致，验证了预测模型的有效性。木质素的存在抑制了合成生物质的热解反应速率，纤维素在活化能和频率因子中起主导作用。半纤维素由于支链丰富而复杂，热解反应顺序受其影响很大。还建立了预测模型，用于计算三组分已知比例的天然生物质的动力学参数。预测结果与实验结果一致，验证了预测模型的有效性。木质素的存在抑制了合成生物质的热解反应速率，纤维素在活化能和频率因子中起主导作用。半纤维素由于支链丰富而复杂，热解反应顺序受其影响很大。还建立了预测模型，用于计算三组分已知比例的天然生物质的动力学参数。预测结果与实验结果一致，验证了预测模型的有效性。还建立了预测模型，用于计算三组分已知比例的天然生物质的动力学参数。预测结果与实验结果一致，验证了预测模型的有效性。还建立了预测模型，用于计算三组分已知比例的天然生物质的动力学参数。预测结果与实验结果一致，验证了预测模型的有效性。