核桃壳热重分析及气相色谱-质谱联用的热行为研究
Thermal behaviour of walnut shells by thermogravimetry with gas chromatography-mass spectrometry analysis.
作者信息
Fan Fangyu, Li Han, Xu Yuqiao, Liu Yun, Zheng Zhifeng, Kan Huan
机构信息
Key Laboratory for Forest Resources Conservation and Utilisation in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, 650224 Kunming, Yunnan, People's Republic of China.
School of Light Industry and Food Engineering, Southwest Forestry University, 650224 Kunming, People's Republic of China.
出版信息
R Soc Open Sci. 2018 Sep 12;5(9):180331. doi: 10.1098/rsos.180331. eCollection 2018 Sep.
The present study introduces thermogravimetry with gas chromatography-mass spectrometry (TG-GC-MS) at four different heating rates to investigate the activation energy and thermal degradation behaviour of walnut shell pyrolysis. The distributed activation energy model (DAEM) was applied to investigate the activation energy. According to values of the activation energy and the correlation coefficient by the DAEM, the activation energy (98.69-267.75 kJ mol) and correlation coefficient (0.914-0.999) were determined for pyrolysis of walnut shells. GC-MS was performed to investigate the pyrolysis products from walnut shells at different critical temperature points. More than 20 different substances were identified at different temperatures from GC-MS results. With the increasing pyrolysis temperature, furan, furfural, benzene and long chain alkanes were successively identified in different GC-MS experimental results.
本研究采用热重-气相色谱-质谱联用仪（TG-GC-MS）在四种不同升温速率下，研究核桃壳热解的活化能及热降解行为。应用分布活化能模型（DAEM）来研究活化能。根据DAEM得到的活化能值和相关系数，确定核桃壳热解的活化能为98.69 - 267.75 kJ/mol，相关系数为0.914 - 0.999。利用气相色谱-质谱联用仪（GC-MS）研究了核桃壳在不同临界温度点的热解产物。根据GC-MS结果，在不同温度下鉴定出20多种不同物质。随着热解温度升高，在不同的GC-MS实验结果中依次鉴定出呋喃、糠醛、苯和长链烷烃。
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