Thermal decomposition study of isolated lignin using temperature modulated TGA

被引：28
作者：
Kubo, Satoshi [1 ,2 ]
Kadla, John F. [1 ]
机构：
[1] Univ British Columbia, Dept Wood Sci, Vancouver, BC V6T 1Z4, Canada
[2] Forestry & Forest Prod Res Inst, Dept Biomass Chem, Tsukuba, Ibaraki 305, Japan
来源：
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY | 2008年 / 28卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
activation energy; hi-resolution TGA; lignin pyrolysis; modulated TGA;
D O I：
10.1080/02773810802124928
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Temperature modulated TGA (MTGA) was utilized to study the kinetics of lignin pyrolysis. Three industrial lignin preparations were investigated: softwood kraft lignin, hardwood kraft lignin, and Alcell lignin. Unlike conventional TGA, MTGA provides apparent activation energy (Ea) distribution curve using a single experimental run in a relatively short experimental time. Under Hi-Res conditions using a dynamic heating rate, the activation energies were higher than those determined using a constant heating rate. Likewise, small sample masses provided higher activation energies than those run with large sample mass. These effects can be eliminated by using a relatively large sample mass, 10 mg. In this study, we discuss the effect of MTGA conditions on calculating Ea distribution curves for lignin pyrolysis.
引用
收藏
页码：106 / 121
页数：16
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