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Licensed Unlicensed Requires Authentication Published by De Gruyter February 23, 2010

Liquefaction behavior of Western red cedar and Japanese beech in the ionic liquid 1-ethyl-3-methylimidazolium chloride

  • Atsushi Nakamura , Hisashi Miyafuji and Shiro Saka
From the journal Holzforschung

Abstract

Western red cedar and Japanese beech are studied concerning their liquefaction behavior with an ionic liquid, 1-ethyl-3-methylimidazolium chloride ([C2mim][Cl]). Significant differences in liquefaction behavior were observed in terms of solubility and the lignin content of the insoluble residues. Thioacidolysis analysis of the residues confirmed that β-O-4 bonds in lignin were cleaved preferentially by the treatment with [C2mim][Cl]. The differences in liquefaction behavior can be explained by structural differences between softwood and hardwood lignins. Furthermore, gel permeation chromatography and GC-MS analyses revealed that cellulose and hemicelluloses were decomposed partly to monomeric sugars such as glucose, mannose, galactose, xylose, and arabinose.


Corresponding author. Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan Phone/Fax: +81-75-753-9116

Received: 2009-5-8
Accepted: 2009-12-16
Published Online: 2010-02-23
Published Online: 2010-02-23
Published in Print: 2010-04-01

©2010 by Walter de Gruyter Berlin New York

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