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以柳桉生物质为原料,利用红外光谱(FTIR)对其结构进行表征,获得主要官能团的分布信息。随后利用热重红外联用技术(TG-FTIR)研究柳桉的热解行为。柳桉主热解阶段存在由纤维素热解造成的主失重峰以及半纤维素和木质素热解引起的两个肩状峰。同时引入双高斯分布活化能模型(DG-DAEM)对柳桉的热解动力学参数进行计算,结果表明其表观活化能主要分布在第一高斯区间。此外通过在线FTIR分析进一步探讨了典型小分子气体产物的生成和演变机理。
The structure of Glycyrrhiza uralensis Fisch was studied by FTIR and the distribution information of main functional groups was obtained. Then pyrolytic behavior of E. grandis was studied by TG-FTIR. During the main pyrolysis stage of E. gmelinii there are two main peak of weight loss caused by cellulose pyrolysis and two shoulder peaks caused by hemicellulose and lignin pyrolysis. At the same time, the double Gaussian distribution activation energy model (DG-DAEM) was used to calculate the pyrolysis kinetic parameters. The results showed that the apparent activation energy mainly distributed in the first Gaussian interval. In addition, the formation and evolution mechanism of typical small molecular gas products was further explored by online FTIR analysis.