[1]王秀文,赵静,董承健,等.木材类Klason法木质素的结构表征及其热解特性[J].东南大学学报(自然科学版),2014,44(4):782-786.[doi:10.3969/j.issn.1001-0505.2014.04.018]
 Wang Xiuwen,Zhao Jing,Dong Chengjian,et al.Structure characterization and pyrolysis behaviour of Klason lignin from wood[J].Journal of Southeast University (Natural Science Edition),2014,44(4):782-786.[doi:10.3969/j.issn.1001-0505.2014.04.018]
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木材类Klason法木质素的结构表征及其热解特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第4期
页码:
782-786
栏目:
能源与动力工程
出版日期:
2014-07-16

文章信息/Info

Title:
Structure characterization and pyrolysis behaviour of Klason lignin from wood
作者:
王秀文赵静董承健沈德魁肖睿
东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096
Author(s):
Wang Xiuwen Zhao Jing Dong Chengjian Shen Dekui Xiao Rui
Key Laboratory of Energy Conversion and Process Control of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
木质素 结构 TG-FTIR 动力学研究
Keywords:
lignin structure TG-FTIR kinetic analysis
分类号:
TK6
DOI:
10.3969/j.issn.1001-0505.2014.04.018
摘要:
运用元素分析与红外光谱分析仪(FTIR)对Klason法提取的枫木及杉木木质素进行化学结构表征,发现枫木木质素比杉木木质素含有更多的紫丁香酚结构单元.利用热重红外联用分析仪(TG-FTIR)研究了2种木材木质素在动态升温条件下的失重特性及主要气体产物的析出过程,发现木质素热解过程主要分2个阶段,其中枫木木质素为148~268 ℃及295~494 ℃两个阶段,杉木木质素则为150~308 ℃及312~518 ℃两个阶段.第1个阶段的主要产物是酚类化合物及二氧化碳(CO2),第2个阶段则主要是甲烷以及甲醇的析出,一氧化碳(CO)的生成量也有所增加.基于实验分析,采用一级一阶模型计算枫木、杉木木质素热解2个阶段的动力学参数.
Abstract:
The chemical structure of maple lignin and fir lignin extracted by the Klason method is characterized by the elemental analysis and the Fourier transform infrared spectroscopy(FTIR). It is found that lignin from maple contains more syringyl-type groups than that from fir. TG-FTIR(thermogravimetric analyzer coupled with FTIR)is used to examine the characteristics of mass loss and the evolution of typical gaseous product during the dynamic heating process. Pyrolysis of the two lignins can be divided into two consecutive mass-loss stages: 148 to 268 ℃ and 295 to 494 ℃ for maple lignin, and 150 to 308 ℃ and 312 to 518 ℃ for fir lignin, respectively. Phenolic compounds together with carbon dioxid(CO2)are remarkably generated in the first mass-loss stage. While in the second stage, the evolutions of methane and methanol are mainly generated, and carbon monoxide(CO)is also increased. Based on experimental analyses, a simple one-stage first-order kinetic model is proposed to calculate pyrolysis kinetic parameters of two main pyrolysis stages for maple lignin and fir lignin.

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备注/Memo

备注/Memo:
收稿日期: 2013-12-24.
作者简介: 王秀文(1991—),女,硕士生;沈德魁(联系人),男,博士,教授,101011398@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51106030)、国家重点基础研究发展计划(973计划)资助项目(2012CB215306,2011CB201505).
引用本文: 王秀文,赵静,董承健,等.木材类Klason法木质素的结构表征及其热解特性[J].东南大学学报:自然科学版,2014,44(4):782-786. [doi:10.3969/j.issn.1001-0505.2014.04.018]
更新日期/Last Update: 2014-07-20