TG-FTIR Study on the Pyrolysis Properties of Lignin from Different Kinds of Woody Biomass
作者机构：MOE Key Laboratory of Wooden Material Science and Application， College of Materials Science and Technology， Beijing Forestry University College of Agricultural Engineering and Food Science， Shandong University of Technology
出 版 物：《造纸与生物质材料（英文）》 (造纸与生物质材料(英文))
年 卷 期：2018年第2期
页 面：1-7页
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
摘 要：Pyrolysis properties of lignin separated from four different kinds of wood（fir, larch, poplar, and eucalyptus） compared with commercial lignin were investigated using a thermogravimetric analyzer coupled to a Fouriertransform infrared spectrometer（TG-FTIR）. Kinetic parameters of lignin thermal cracking reaction, such as activation energy and pre-exponential factor, were calculated using a three-dimensional diffusion model. The carbon residue rate and activation energy of softwood lignin were higher than those of hardwood lignin, showing that the decomposition of the former is relatively more difficult than that of the latter during pyrolysis. The distinct characteristic peaks of small-molecule gases and oxygenated chemicals such as ethers, phenols, acids, aldehydes, and alcohols were observed near the maximum weight loss rate by analyzing the 3D IR spectrum of the gas phase products. The formation routes of the main gaseous products were discussed, and the following order of releasing amounts was noted: CO2CH4H2OCO. It is believed that these results will provide valuable information for the thermo-chemical conversion process of lignin from the point of view of feedstock.