Wang Fang, Zhang Deli, Chen Mei, Yi Weiming, Wang Lihong
School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, China.
Shandong Research Center of Engineering and Technology for Clean Energy, Zibo, China.
Front Bioeng Biotechnol. 2019 Aug 2;7:188. doi: 10.3389/fbioe.2019.00188. eCollection 2019.
In order to study the effect of biomass components on the low temperature (30-400°C) pyrolysis, the thermogravimetric analysis (TGA) of corn stover (CS) and its three detergent fibers (extracted by Van Soest method) were studied, and the model compounds of cellulose, hemicellulose and lignin were also tested as comparison. The results shows the low temperature pyrolysis index (P) is significantly different (P < P < P < P < P < P < P). Klason-lignin has stronger thermal stability and decomposes more difficult than alkali lignin. The original cross-linked structure and interaction of the three components inhibited volatiles releasing, especially significant below 300°C. The synergistic effect between cellulose and lignin promoted devolatilization and decreased the initial temperature of cellulose decomposition. At last, the low temperature pyrolysis kinetics parameters (apparent activation energy and pre-exponential factor) of CS and its detergent fibers were calculated via the Coats-Redfern methods. This study can provide a theoretical basis for optimization of process conditions and industrial application of low temperature pyrolysis for lignocellulosic biomass.
为了研究生物质成分对低温（30 - 400°C）热解的影响，对玉米秸秆（CS）及其三种洗涤剂纤维（采用范氏法提取）进行了热重分析（TGA），并测试了纤维素、半纤维素和木质素的模型化合物作为对照。结果表明低温热解指数（P）存在显著差异（P < P < P < P < P < P < P）。克拉斯森木质素比碱木质素具有更强的热稳定性且更难分解。三种成分的原始交联结构和相互作用抑制了挥发物的释放，在300°C以下尤为显著。纤维素和木质素之间的协同作用促进了挥发分的析出并降低了纤维素分解的初始温度。最后，通过Coats - Redfern方法计算了CS及其洗涤剂纤维的低温热解动力学参数（表观活化能和指前因子）。该研究可为木质纤维素生物质低温热解工艺条件的优化及工业应用提供理论依据。
