Key Laboratory for Biomass Clean Energy of Anhui Province, University of Science and Technology of China, Hefei 230026, China.
Bioresour Technol. 2013 Mar;131:40-6. doi: 10.1016/j.biortech.2012.12.136. Epub 2012 Dec 26.
An in-depth investigation was conducted on the kinetic analysis of raw biomass using thermogravimetric analysis (TGA), from which the activation energy distribution of the whole pyrolysis process was obtained. Two different stages, namely, drying stage (Stage I) and devolatilization stage (Stage II), were shown in the pyrolysis process in which the activation energy values changed with conversion. The activation energy at low conversions (below 0.15) in the drying stage ranged from 10 to 30 kJ/mol. Such energy was calculated using the nonisothermal Page model, known as the best model to describe the drying kinetics. Kinetic analysis was performed using the distributed activation energy model in a wide range of conversions (0.15-0.95) in the devolatilization stage. The activation energy first ranged from 178.23 to 245.58 kJ/mol and from 159.66 to 210.76 kJ/mol for corn straw and wheat straw, respectively, then increasing remarkably with an irregular trend.
采用热重分析（TGA）对生物质原料的动力学分析进行了深入研究，从中获得了整个热解过程的活化能分布。热解过程中显示出两个不同的阶段，即干燥阶段（阶段 I）和挥发分释放阶段（阶段 II），在这两个阶段中，活化能随转化率而变化。在干燥阶段（转化率低于 0.15）的低转化率下，活化能值在 10 到 30 kJ/mol 之间。这种能量是使用非等温热力学 Page 模型计算得出的，该模型被认为是描述干燥动力学的最佳模型。在挥发分释放阶段（转化率为 0.15 到 0.95）的宽转化率范围内，采用分布式活化能模型进行了动力学分析。玉米秸秆和小麦秸秆的活化能分别在 178.23 到 245.58 kJ/mol 和 159.66 到 210.76 kJ/mol 的范围内，然后以不规则的趋势显著增加。
