One-step fractionation of the main components of bamboo by formic acid-based organosolv process under pressure

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Yongchao Zhang, Qingxi Hou, Yingjuan Fu, Chunlin Xu, Annika I. Smeds, Stefan Willför, Zhaojiang Wang, Zongquan Li, Menghua Qin
Publisher: Taylor & Francis, Inc.
Publication year: 2018
Journal: Journal of Wood Chemistry and Technology
Journal acronym: J. Wood Chem. Technol.
Volume number: 38
Issue number: 3
Start page: 170
End page: 182
Number of pages: 13
ISSN: 0277-3813
eISSN: 1532-2319


Abstract

To promote the efficient utilization of lignocellulosic materials, one-step fractionation by formic acid-based organosolv process under pressure has been studied for converting lignocellulose in its main components. Lignin and hemicelluloses were selectively dissolved, while cellulose was not obviously degraded. Under optimized conditions (85% formic acid, a liquor-to-solid ratio of 7:1, and a temperature of 145 degrees C for 45min), this process provided a high efficient way to separate the main components of bamboo, obtaining 42.2% cellulose pulp, 31.5% lignin, 8.5% hemicellulose-rich fraction, 3.56% furfural and 3.80% acetic acid. Cellulose pulp with satisfying viscosity could easily be bleached to a high brightness of over 87% ISO with a short bleaching sequence, and had an acceptable paper strength properties. The recovered lignin fraction contained a small amount of carbohydrates and a considerable part of proteins and p-hydroxycinnamates. Additionally, the organic substances in hemicellulose-rich fraction obtained was composed of 95% carbohydrates, most of which was monosaccharides, as well as 5% lignin.


Keywords

Bamboo, cellulose pulp, formic acid fractionation


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Last updated on 2019-15-09 at 05:44