Lignin-First Fractionation of Softwood Lignocellulose Using a Mild Dimethyl Carbonate and Ethylene Glycol Organosolv Process

被引：85

作者：

De Santi, Alessandra ^{[1
]}

Galkin, Maxim V. ^{[1
]}

Lahive, Ciaran W. ^{[2
]}

Deuss, Peter J. ^{[2
]}

Barta, Katalin ^{[1
,3
]}

机构：

[1] Univ Groningen, Stratingh Inst Chem, Nijenborgh 4, Groningen, Netherlands

[2] Univ Groningen, Dept Chem Engn ENTEG, Nijenborgh 4, Groningen, Netherlands

[3] Graz Univ, Dept Chem Organ & Bioorgan Chem, Heinrichstr 28-2, A-8010 Graz, Austria

来源：

CHEMSUSCHEM | 2020年 / 13卷 / 17期

基金：

欧洲研究理事会;

关键词：

acidolysis; biomass valorization; depolymerization; dimethyl carbonate; lignin; ACID-CATALYZED DEPOLYMERIZATION; IN-SITU; BIOMASS; CONVERSION; AROMATICS; PRETREATMENT; SOLUBILITY; PLATFORM; SOLVOLYSIS; MIXTURES;

D O I：

10.1002/cssc.201903526

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A mild lignin-first acidolysis process (140 degrees C, 40 min) was developed using the benign solvent dimethyl carbonate (DMC) and ethylene glycol (EG) as a stabilization agent/solvent to produce a high yield of aromatic monophenols directly from softwood lignocellulose (pine, spruce, cedar, and Douglas fir) with a depolymerization efficiency of 77-98 %. Under the optimized conditions (140 degrees C, 40 min, 400 wt % EG and 2 wt % H2SO4 to pinewood), up to 9 wt % of the aromatic monophenol was produced, reaching a degree of delignification in pinewood of 77 %. Cellulose was also preserved, as evidenced by a 85 % glucose yield after enzymatic digestion. An in-depth analysis of the depolymerization oil was conducted by using GC-MS, HPLC, 2 D-NMR, and size-exclusion chromatography, which provided structural insights into lignin-derived dimers and oligomers and the composition of the sugars and derived molecules. Mass balance evaluation was performed.

引用

页码：4468 / 4477

页数：10