木质素结构及热解特性
2014年9月 CIESC Journal
September 2014第65
卷 第9期 化 工 学 报 V ol.65 No.9
木质素结构及热解特性
陈磊1，陈汉平1，陆强2，宋扬3，丁学杰3，王贤华1，杨海平1
（1华中科技大学煤燃烧国家重点实验室，湖北 武汉 430074；2华北电力大学生物质发电成套设备国家工程实验室，
北京 102206；3贵州华电毕节热电有限公司，贵州 毕节 551713）
摘要：为研究结构类型和提取方法对木质素热解特性的影响，本研究采用Klason 方法预处理得到的棉杆、核桃壳
Klason 木质素和贝克曼方法预处理得到的核桃壳磨木木质素（MWL ），并结合傅里叶红外光谱仪（FT-IR ）和快速热
解仪-气相色谱/质谱联用（Py-GC/MS ）对其化学结构和热解特性进行分析。FT-IR 表明碱木质素为G 型木质素，棉
杆木质素属于GS 类型木质素，而核桃壳木质素具有 HGS 木质素的特征；Py-GC/MS 分析发现原料的变化以及提取
方法对木质素热解产物的组成有明显的影响，在棉杆Klason 木质素中邻苯二酚类产物含量为28.18%，而在核桃壳
Klason 和磨木木质素的含量分别为18.12%和35.11%。同时研究表明经两种方法处理的木质素结构有明显的不同，其中Klason 木质素结构中苯丙酸侧链上的α-和β-醚键明显断裂，而贝克曼处理主要体现在苯基芳基醚键的断裂。 关键词：木质素；结构分析；快速热解；热裂解特性
DOI ：10.3969/j.issn.0438-1157.2014.09.043
中图分类号：TK 6 文献标志码：A 文章编号：0438—1157（2014）09—3626—08
Characterization of structure and pyrolysis behavior of lignin
CHEN Lei 1, CHEN Hanping 1, LU Qiang 2, SONG Yang 3, DING Xuejie 3, WANG Xianhua 1, YANG Haiping 1 （1State Key Laboratory of Coal Combustion , Huazhong University of Science & Technology , Wuhan 430074, Hubei , China ; 2National Engineering Laboratory for Biomass Power Generation Equipment , North China Electric Power University , Beijing 102206, China ; 3Huadian Bijie Thermal Power Co ., Ltd ., Bijie 551713, Guizhou , China ）
Abstract : The influence of extraction method and structure type on the pyrolysis behavior of lignin was investigated. The functional groups and pyrolysis characteristics of Klason lignin extracted from cotton stalk and walnut shell by the Klason method (labeled as KCSL and KWSL, respectively), and milled wood lignin extracted from walnut shell via the Bj?rkman method (labeled as BWSL), were analyzed with Fourier transform infrared spectroscopy (FTIR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS). The results were compared with commercial alkali lignin (CAL). The FTIR results revealed that alkali lignin, cotton stalk lignin and walnut shell lignins were Type G , Type GS and Type HGS, respectively. The pyrolysis results from Py-GC/MS suggested that the products distribution of various lignins were affeted by material type and extraction method greatly. The contents of catechol derivatives obtained from KCSL, KWSL and BWSL were 28.18%, 18.12% and 35.11%. Meanswhile modification of BWSL was mainly attributed to the breakage of benzyl aryl ether linkages, whereas cleavage of ether bonds at the α-and β-positions on the propanoid side chain was the marked feature of Klason lignin.
2014-01-06收到初稿，2014-05-16收到修改稿。
联系人：陈汉平。第一作者：陈磊（1990—），男，硕士研究生。
基金项目：国家重点基础研究发展计划项目（2013CB228102）；国
家自然科学基金项目(51376076)；公益行业(农业)科研专项（201303095）。 Received date : 2014-01-06. Corresponding author : Prof. CHEN Hanping, hp.chen@https://www.docsj.com/doc/7214250035.html, Foundation item : supported by the National Basic Research Program of China (2013CB228102), the National Natural Science Foundation of
China (51376076) and the Special Fund for Agro-scientific Research in the
Public Interest(201303095).