Phenolics Production through Catalytic Depolymerization of Alkali Lignin with Metal Chlorides

被引：1

作者：

Zhang, Xinghua ^{[1
]}

Zhang, Qi ^{[1
]}

Long, Jinxing ^{[1
]}

Xu, Ying ^{[1
]}

Wang, Tiejun ^{[1
]}

Ma, Longlong ^{[1
]}

Li, Yuping ^{[1
]}

机构：

[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China

来源：

BIORESOURCES | 2014年 / 9卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Alkali lignin; Catalytic depolymerization; Metal chlorides; Phenolic compounds; HOT-COMPRESSED WATER; WOOD LIGNIN; PYROLYSIS; DEGRADATION; CONVERSION; HYDRODEOXYGENATION; HYDROGENOLYSIS; HEMICELLULOSE; TEMPERATURE; SOLVENT;

D O I：

10.15376/biores.9.2.3347-3360

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Lignin is an important renewable source of phenolic products. In this study, alkali lignin was depolymerized to produce phenolic compounds. The effects of catalyst, solvent, reaction time, and reaction temperature on the yields of liquid products and volatile fractions were investigated in detail. Compared with the solvents water and octane, alcohols can significantly promote depolymerization of lignin due to the excellent solubility of the degradation products and intermediates. Under the conditions of 300 degrees C for 2 h in the solvent ethanol, the highest yields of liquid products (75.8 wt%) and volatile fraction (38.1 wt%) were obtained over a ZnCl2 catalyst. Gas chromatograph-mass spectroscopy analysis demonstrated that the volatile fraction was composed of guaiacols (15.09 wt%), phenols (15.79 wt%), and syringols (2.28 wt%). Furthermore, the mechanism for lignin depolymerization is discussed.

引用

页码：3347 / 3360

页数：14

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