半纤维素
纤维素
木质素
热重分析
热解
分解
化学
解聚
热分解
反应机理
热解炭
化学工程
有机化学
材料科学
催化作用
工程类
作者
Jun Yi Yeo,Bridgid Lai Fui Chin,Jun Kit Tan,Ying Sheng Loh
标识
DOI:10.1016/j.joei.2017.12.003
摘要
The thermal degradation behavior and pyrolytic mechanism of cellulose, hemicellulose, and lignin are investigated at different heating rates from 10 Kmin−1 to 100 Kmin−1 with a step-size of 10 Kmin−1 using thermogravimetric analysis (TGA) equipment. It is observed that there are one, two, and three stages of pyrolytic reactions takes place in cellulose, hemicellulose, and lignin respectively. Isoconversional method is not suitable to analyse pyrolysis of hemicellulose and lignin as it involves multi-step reactions. The activation energies of the main decomposition stage for cellulose, hemicellulose, and lignin are 199.66, 95.39, and 174.40 kJ mol−1 respectively. It is deduced that the pyrolysis reaction of cellulose corresponds to random scission mechanism while the pyrolysis reaction of hemicellulose and lignin follows the order based reaction mechanisms.
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