Lewis-acid catalyzed depolymerization of Protobind lignin in supercritical water and ethanol

被引：82

作者：

Guvenatam, Burcu ^{[1
]}

Heeres, Erik H. J. ^{[2
]}

Pidko, Evgeny A. ^{[1
,3
]}

Hensen, Ernie J. M. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Schuit Inst Catalysis, Lab Inorgan Mat Chem, NL-5600 MB Eindhoven, Netherlands

[2] Univ Groningen, Inst Technol & Management, NL-9747 AG Groningen, Netherlands

[3] Eindhoven Univ Technol, Inst Complex Mol Syst, NL-5600 MB Eindhoven, Netherlands

来源：

CATALYSIS TODAY | 2016年 / 259卷

关键词：

Lignin; Depolymerization; Supercritical ethanol; Lewis acid; Alkylation; SOLVOLYSIS LIGNIN; DEHYDRATION; CONDENSATION; HYDROGEN; LIQUEFACTION; SELECTIVITY; CHEMICALS; PROPANOL; ALCOHOLS; ETHYLENE;

D O I：

10.1016/j.cattod.2015.03.041

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The use of metal acetates, metal chlorides and metal triflates as Lewis acid catalysts for the depolymerization of soda lignin under supercritical conditions was investigated. The reactions were carried out at 400 degrees C in water and ethanol. Lignin conversion in supercritical water led to formation of insoluble char and resulted in low yields of monomeric products. When the reaction was performed in supercritical ethanol, char formation was inhibited and higher yields of low molecular-weight organic products were obtained. The ethanol solvent was also converted in two ways. Firstly, the lignin depolymerization products were alkylated by ethanol. Secondly, ethanol was converted into a range of higher hydrocarbons including paraffins and olefins. Possible mechanisms of the lignin and ethanol conversion reactions are discussed. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：460 / 466

页数：7

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