Characteristics and kinetic study on pyrolysis of five lignocellulosic biomass via thermogravimetric analysis
Characteristics and kinetic study on pyrolysis of five lignocellulosic biomass via thermogravimetric analysis
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DOI：
10.1016/j.biortech.2015.05.062
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发表时间：
2015-09-01
影响因子：
11.4
通讯作者：
Laghari, Mahmood
中科院分区：
文献类型：
--
作者：
Chen, Zhihua;Hu, Mian;Laghari, Mahmood
采用热重分析法研究了松木锯屑、蕨杆、小麦秸秆、甘蔗渣和黄麻棒5种木质纤维素生物质的热解特性和热解动力学。五种木质纤维素类生物质的热解可分为三个阶段，分别对应于半纤维素、纤维素和木质素的热解。各阶段的单高斯活化能分布为148.50-201.13 kJ/mol，标准偏差为2.60-13.37 kJ/mol。以不同阶段的动力学参数作为初始猜测值，采用三并联DAEM模型进行计算，拟合质量好，收敛速度快。半纤维素、纤维素和木质素的平均活化能范围分别为148.12-164.56 kJ/mol、171.04-179.54 kJ/mol和175.71-201.60 kJ/mol，标准偏差分别为3.91-9.89、0.29-1.34和23.22-27.24 kJ/mol。半纤维素、纤维素和木质素的质量分数分别为0.12-0.22、0.54-0.65和0.17-0.29。(C)2015爱思唯尔有限公司版权所有。
Pyrolysis characteristics and kinetic of five lignocellulosic biomass pine wood sawdust, fern (Dicranopteris linearis) stem, wheat stalk, sugarcane bagasse and jute (Corchorus capsularis) stick were investigated using thermogravimetric analysis. The pyrolysis of five lignocellulosic biomass could be divided into three stages, which correspond to the pyrolysis of hemicellulose, cellulose and lignin, respectively. Single Gaussian activation energy distributions of each stage are 148.50-201.13 kJ/mol with standard deviations of 2.60-13.37 kJ/mol. The kinetic parameters of different stages were used as initial guess values for three-parallel-DAEM model calculation with good fitting quality and fast convergence rate. The mean activation energy ranges of hemicellulose, cellulose and lignin were 148.12-164.56 kJ/mol, 171.04-179.54 kJ/mol and 175.71-201.60 kJ/mol, with standard deviations of 3.91-9.89, 0.29-1.34 and 23.22-27.24 kJ/mol, respectively. The mass fractions of hemicellulose, cellulose and lignin in lignocellulosic biomass were respectively estimated as 0.12-0.22, 0.54-0.65 and 0.17-0.29. (C) 2015 Elsevier Ltd. All rights reserved.