蔗渣碱木素的热裂解特性.pdf

化工进展
462
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2012年第31卷第2期
研究开发
Dovowpsoos-d
蔗渣碱木素的热裂解特性
彭云云,武书彬
(国家纸制品质量监督检验中心,广东东莞523808:2华南理工大学制浆造纸工程因家重点实验室
广东广州510641)
摘要:利用热重分析法研究了蔗渣碱木素的热解特性,并利用TG-FTIR和Py-GCMS对碱木素的热解产物种
类及分布规律进行了分析。结果表明,木素热解呈现宽温度区域,可分为4个阶段,主要裂解温度范围为200
500℃,在400℃左右失重率最大,残余物得率较高。TG-FTIR分析显示了木素热解过程中气体产物的释放规
律,300~500℃为主要热解挥发阶段,大部分气体产物在400℃左右产率达到最大。 PY-GCMS分析表明,木
素的热解产物大致可分为杂环、苯类芳香族、酚类芳香族、酯和酸等化合物,在主要热分解阶段,随着热解温
度的升高,苯类和酚类芳香族化合物的含量增多,600℃时酚类物质的含量最高
关键词:木素;热解;热解气质联用;热重红外联用
中图分类号:TK6
文献标志码:A
文章编号:1000-6613(2012)02-0462-06
Pyrolysis characteristics of bagasse alkali lignin
PENG Yanyun, WU Shubin
National Center for Quality Supervision & Test of Paper Products, Donguan 523808, Guangdong, China
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology
Guangzhou 510641, Guangdong, China)
Abstract: The pyrolysis characteristics of the lignin were studied by TG analysis, and the identity and
distribution of pyrolysis products were analyzed by TG-FTIR and PY-GCMS. The results showed that
the pyrolysis process of sugarcane bagasse lignin can be divided into four stages, and the major
reaction stage was within 200-500 C. The highest peak appeared at about 400 C. TG-FTIR analysis
showed that the gas products of lignin were mostly released within the temperature range from 300 C
to 500 C and 400 C was the maximum yield temperature. The pyrolysis products can be classified
into heterocycles, benzene, aromatic phenols, esters and acid compounds according to the results from
PY-GCMS at different reaction temperatures. The amount of benzene and phenolic aromatic
compounds became larger with the increase of pyrolysis temperature in the main pyrolysis stage and
the yield of phenolic aromatic compounds was the highest
Key words: lignin; pyrolysis; PY-GCMS; TG-FTIR
碱木素是从造纸碱法制浆黑液中回收的产物,
生:物质热裂解是将生物质能源转化为高品位
其是一种可再生的含量较丰富的生物质资源。对回
收木素的应用,国内外已经进行了不少的研究いイ。收稿目期:20192:修改稿日期:2011846
研究开发制浆黑液、工业碱木素、废纸制浆脱墨污
基金项目:国家重点基础研究发展计划(2007CB210201)及国家863
计划(2007AA057456)项目。
泥等造纸工业废弃物生物质资源的热化学转化利用
第一作者及联系人;彭云云(1985),女,硕士,主要从事植物纤
新途径、新技术,既有很好的环境效益,又有一定维类生物质转化为清洁燃料与化学品、纸制品检测等方面的研究
的经济效益。
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