Depolymerization of Different Organosolv Lignins in Supercritical Methanol, Ethanol, and Acetone To Produce Phenolic Monomers

被引：61

作者：

Erdocia, Xabier ^{[1
]}

Prado, Raquel ^{[2
]}

Fernandez-Rodriguez, Javier ^{[1
]}

Labidi, Jalel ^{[1
]}

机构：

[1] Univ Basque Country, Chem & Environm Engn Dept, Plaza Europa 1, San Sebastian 20018, Spain

[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2016年 / 4卷 / 03期

关键词：

Lignin; Supercritical solvents; Depolymerization; Monomeric phenols; Solvolysis; WATER; CONVERSION; BEHAVIOR; FUEL;

D O I：

10.1021/acssuschemeng.5b01377

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Olive tree pruning was delignified by organosolv processes (acetosolv, formosolv, and acetosolv/formosolv) to extract different lignins. The obtained lignins (acetosolv lignin (AL), formosolv lignin (FL), and acetosolv/formosolv lignin (AFL)) were depolymerized using three different solvents (methanol, ethanol, and acetone) under supercritical conditions in a batch reactor to produce high value-added compounds. The recovered products (oil, char, and residual lignin) were analyzed in order to determine their composition and to know the influence of employed solvent and lignin. Lignin was successfully depolymerized in all cases, and the molecular weight of residual lignin was significantly reduced compared to raw lignin. The obtained oil had numerous phenolic monomers, with syringol and guaiacol being the main products in all studied cases. Depolymerization of AFL led to maximum yield of oil (38.04%), and acetone was the best solvent in terms of phenolic monomers production.

引用

页码：1373 / 1380

页数：8

共 25 条

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