当前位置:
X-MOL 学术
›
Biomass Convers. Biorefin.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
分布式活化能模型和Coats-Redfern积分法在工业木质素热解动力学研究中的应用
Biomass Conversion and Biorefinery
(
IF
3.5
)
Pub Date : 2022-08-08
, DOI:
10.1007/s13399-022-03132-6
Long Chen
,
Jian Hu
,
Qian Han
,
Anqi Xie
,
Zhi Zhou
,
Jiankui Yang
,
Qiyuan Tang
,
Baobin Mi
,
Fangfang Wu
本研究探讨了废工业木质素在热重分析仪中的动力学特征和热解行为。DAEM 和 Coats-Redfern 积分方法用于评估不同加热速率(10-30 °C/min)下的动力学参数。理化检验表明,工业木质素具有生产精细化学品的良好前景。TGA结果表明,工业木质素的热解过程可分为失水阶段、大量分解阶段(255~376℃)和炭化阶段(392~508℃)三个阶段。DAEM 计算的活化能为 V/V* 上升时为 12.7-23.9 kJ/mol,不同热解阶段的 Coats-Redfern 积分方法计算的活化能为 21-27 kJ/mol。此外,块状分解阶段的平均活化能高于炭化阶段。DAEM 和 Coats-Redfern 方法计算的相似活化能证实了动力学计算的准确性。
"点击查看英文标题和摘要"
Application of distributed activation energy model and Coats-Redfern integration method in the study of industrial lignin pyrolysis kinetics
This study addressed the kinetics characteristics and pyrolysis behavior of waste industrial lignin in a thermogravimetric analyzer. DAEM and Coats-Redfern integration methods were employed to evaluate the kinetic parameters at varying heating rates (10–30 °C/min). The physicochemical inspection showed that the industrial lignin had excellent prospects to produce finest chemicals. The TGA results illustrated that the pyrolysis process of industrial lignin could be divided into three stages, including the water loss stage, massive decomposition stage (255–376℃), and charring stage (392–508℃). The activation energies calculated by DAEM are 12.7–23.9 kJ/mol as V/V* rose and 21–27 kJ/mol by the Coats-Redfern integration method of different pyrolysis stages. In addition, the average activation energy of the massive decomposition stage was higher than that of the charring stage. The similar activation energies calculated by both DAEM and Coats-Redfern methods confirmed the accuracy of the kinetic calculations.
更新日期:2022-08-10