摘要
为了阐明木素在热裂解过程中的化学结构的变化,本文研究了杨木磨木木素在高温下(350-600℃)的裂解规律,裂解产物随着温度的变化而出现显著的差异。在温度较低的阶段(350-450℃),木素结构侧链上的键能较低的连接键的断裂,得到比较多的酚类和芳基酮类。而在温度比较高的阶段(500-600℃),产物中除了酚类和更多的芳基酮类以外,还进一步降解生产了呋喃类衍生物及烃类,说明在高温下酚类低分子化合物进一步发生了开环和重排。
In order to elucidate the chemical structure changes of lignin in the pyrolysis process,the thermo degradation mechanism of poplar milled wood lignin is investigated under high temperature condition（ 350- 600℃）.The compositions of the pyrolysis products vary with the change of temperature. Some weak chemical linkages in lignin side chain are cleavged in the low temperature stage（ 350- 450℃）. A lot of phenol and aryl ketone derivatives were obtained. In the higher temperature stage（ 500- 600℃）,furan derivatives and hydrocarbons were produced through further degradation in addition to phenols and more aryl ketones. At higher temperature,low molecule-weight phenolic compounds were undergone aromatic ring- open and structural rearrangement.
作者
谢益民
赵厚宽
谢星鹏
陈学宽
叶哲孜
Xie Yi-min Zhao Hou-kuan Xie Xing-peng Chen Xue-kuan Ye Zhe-zi(Research Institute of Pulp and Paper Engineering, Hubei University of Technology, Wuhan 430068,Hubei, China Hubei Provincial Key Laboratory of Materials for Light Industry, Hubei University of Technology, Wuhan 430068, Hubei, China Wuhan Institute of Bioengineering, School of Pharmacy, Wuhan 430415, Hubei, China)
出处
《造纸科学与技术》
2017年第1期1-6,共6页
Paper Science & Technology
基金
国家自然科学基金(31370574)
湖北省优秀创新团队建设项目(6101-12053)
