期刊
BIORESOURCE TECHNOLOGY
卷 294, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122121
关键词
Xylan extraction; Alkaline steam explosion pre-treatment; Sugarcane trash; Aspen wood; Lignocellulosic biorefinery
资金
- Research Council of Norway (RCN), Norway
- National Research Foundation (NRF), South Africa (BioCoPro) [234288/H30]
The application of steam explosion pre-treatment to extract xylan-rich biopolymers from alkali-impregnated lignocelluloses, while simultaneously increasing the enzymatic digestibility of cellulose, was investigated. Steam-enhanced extraction of xylan from sugarcane trash (SCT) and aspen wood (AW) was performed at varying temperatures (176-204 degrees C) and retention times (3-17 min) after the impregnation of biomass samples with sodium hydroxide at 1:20 (w/w) solid loading ratio. Xylan extraction and cellulose digestibility results were statistically analysed to fix the condition/s for significantly enhanced values. Accordingly, maximum xylan yields of 51 and 24%, and highest cellulose digestibility of 92 and 81%, were attained for SCT and AW respectively following their pre-treatment at 204 degrees C for 10 min. At this most-severe condition, neither xylose nor furfural - a degradation product from xylose - were observed in the hemicellulose extract, indicating steam explosion pre-treatment with alkali impregnation of lignocelluloses as viable biorefinery approach to co-produce xylan biopolymers and bioethanol.
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