Engineering Laboratory for Energy System Process Conversion & Emission Control Technology of Jiangsu Province, School of Energy & Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China.
Institute of Chemical Industry of Forest Products, China Academy of Forest, 210042, China.
Bioresour Technol. 2016 Dec;221:102-110. doi: 10.1016/j.biortech.2016.09.008. Epub 2016 Sep 6.
The solvolysis behavior and reaction kinetics of the three components of biomass (cellulose, hemicelluloses and lignin) liquefied in polyhydric alcohols (PEG 400 or glycerol) were investigated in this paper. Three stages were observed during the solvolysis process and the main degradation stage could be further divided into two zones. The influences of solvents on the liquefaction process of three main components were compared. Based on Starink and Malek methods, kinetic parameters and mechanism functions were obtained. The derived average activation energy of cellulose, hemicellulose and lignin were 108.73, 95.66 and 94.13kJmol in PEG 400, while the values were 102.16, 77.43 and 89.10kJmol in glycerol, respectively. Higher efficiency was observed when using glycerol as solvent, which could be ascribed to the higher polarity value of glycerol. The conversion curves calculated with obtained mechanism models and kinetic parameters were in good agreement with the experimental data.
本文研究了生物质（纤维素、半纤维素和木质素）在多元醇（聚乙二醇 400 或甘油）中溶解的溶剂解行为和反应动力学。在溶剂解过程中观察到三个阶段，主要降解阶段可以进一步分为两个区域。比较了溶剂对三种主要成分液化过程的影响。基于 Starink 和 Malek 方法，得到了动力学参数和机理函数。在聚乙二醇 400 中，纤维素、半纤维素和木质素的平均活化能分别为 108.73、95.66 和 94.13kJ/mol，而在甘油中，相应的值分别为 102.16、77.43 和 89.10kJ/mol。使用甘油作为溶剂时效率更高，这可以归因于甘油的较高极性值。用得到的机理模型和动力学参数计算的转化率曲线与实验数据吻合良好。
