文献类型：期刊文献

中文题名：热解温度对纤维素和木质素成炭结构的影响

英文题名：Effect of Pyrolysis Temperature on Structures of Chars Forming from Cellulose and Lignin

作者：吴迪超[1,2] 陈超[1] 侯兴隆[1] 孙康[1]

第一作者：吴迪超

机构：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业和草原局林产化学工程重点实验室,江苏省生物质能源与材料重点实验室,江苏南京210042;[2]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037

年份：2021

卷号：55

期号：3

起止页码：1-9

中文期刊名：生物质化学工程

外文期刊名：Biomass Chemical Engineering

基金：国家自然科学基金资助项目(31770629)。

语种：中文

中文关键词：纤维素;木质素;热解机理;碳微晶;无定形碳

外文关键词：cellulose;lignin;pyrolysis mechanism;carbon microcrystallines;amorphous carbon

分类号：TQ35;TQ424

摘要：从纤维素、木质素和半纤维素热解转化特征及分子重构建行为着手,利用TG、TEM、Raman、XRD、FT-IR等分析手段探究这3种物质的热解炭化机理。实验结果表明:半纤维素在炭化过程中几乎完全分解;链状结构的纤维素热分解脱除氢氧后,形成的碳自由基发生芳构化重排,大部分构成生物质热解炭中的结晶区;木质素分子结构复杂,呈交联态,在热解过程中同时发生软化熔融,大部分构成了生物质热解炭中的无定形区。在炭化过程中,纤维素在200℃之前主要发生脱水反应,200~400℃是热解的主要阶段;木质素在研究温度范围(200~500℃)内结构相对稳定,在软化熔融的同时仅发生部分结构转变。
This work focused with the assistance of the mechanism of pyrolysis carbonization of cellulose,lignin and hemicellulose were analysed by TG,TEM,Raman,XRD,and FT-IR based on the molecular restructuring behavior of three major components of cellulose,lignin and hemicellulose during pyrolysis.The results showed that hemicellulose was completely decomposed during pyrolysis;molecular rearrangement occurred during the pyrolysis of cellulose,forming crystallized areas in biomass char;lignin had a very complex cross-linked structure,melted during pyrolysis,forming amorphous carbon areas in biomass char.During the charring process,cellulose undergone mainly dehydration reactions when the temperature was lower than 200℃,and the temperature range of 200 to 400℃was the main stage of pyrolysis;lignin was relatively structurally stable in the studied temperature range(200-500℃),with only partial structural transformation occurring while softening and melting.