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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Yongchao Zhang, Qingxi Hou, Yingjuan Fu, Chunlin Xu, Annika I. Smeds, Stefan Willför, Zhaojiang Wang, Zongquan Li, Menghua Qin
Förläggare: Taylor & Francis, Inc.
Publiceringsår: 2018
Tidskrift: Journal of Wood Chemistry and Technology
Tidskriftsakronym: J. Wood Chem. Technol.
Volym: 38
Nummer: 3
Artikelns första sida, sidnummer: 170
Artikelns sista sida, sidnummer: 182
Antal sidor: 13
ISSN: 0277-3813
eISSN: 1532-2319


Abstrakt

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.


Nyckelord

Bamboo, cellulose pulp, formic acid fractionation


Dokument


Senast uppdaterad 2019-09-12 vid 03:09