加热
动能
木质纤维素生物量
生物量(生态学)
等温过程
热力学
焓
吉布斯自由能
活化能
化学
材料科学
木质素
有机化学
热解
地质学
物理
海洋学
量子力学
作者
Zhiqing Zhang,Hanqi Duan,Youjun Zhang,Xiaojuan Guo,Xi Yu,Xingguang Zhang,Md. Maksudur Rahman,Junmeng Cai
出处
期刊:Energy
[Elsevier]
日期:2020-09-01
卷期号:207: 118290-118290
被引量:48
标识
DOI:10.1016/j.energy.2020.118290
摘要
The kinetic compensation effect between the activation energy and the pre-exponential factor has extensively existed in the thermochemical conversion processes of lignocellulosic biomass. The research on the kinetic compensation effect in lignocellulosic biomass torrefaction has been insufficient yet. The torrefaction of the pinewood sample was experimentally investigated by thermogravimetric analysis (TGA) at five isothermal temperatures of 220, 250, 265, 280 and 295 °C. The reaction order model was used to analyze the isothermal torrefaction kinetics of lignocellulosic biomass, and the results showed that many sets of activation energy and pre-exponential factor could describe the experimental data at each temperature equally well and they excellently satisfied the kinetic compensation effect relationship. The linear regression lines of the kinetic compensation effect points at different temperatures intersected at one point, whose values corresponded to the obtained optimal kinetic parameters. A kinetic-compensation-effect-based method was developed and verified to determine the kinetic parameters of isothermal biomass torrefaction. Based on the optimal kinetic parameters, the thermodynamic parameters (including Gibbs free energy, enthalpy, and entropy) of biomass torrefaction processes at various temperatures were calculated and analyzed.
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