期刊
BIORESOURCE TECHNOLOGY
卷 221, 期 -, 页码 111-120出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.08.118
关键词
Energy sorghum; Hydrolysis; Hemicellulose; Cellulose; Lignin
资金
- Pearl River S&T Nova Program of Guangzhou, China [201610010110]
- National Basic Research Program of China [2012CB215304]
- National Natural Science Foundation of China [21476233, 2015A030311022]
- Science and Technology Planning Project of Guangdong Province, China [2014A010106023]
- Key Project of the Natural Science Foundation of Guangdong Province [2015A030311022]
- Youth Innovation Promotion Association, CAS [2015289]
A process for co-extraction of soluble and insoluble sugars from energy sorghum (ES) was developed based on hydrothermal hydrolysis (HH). Two series of ES were investigated: one (N) with a high biomass yield displayed a higher recalcitrance to sugar release, whereas the second (T) series was characterized by high sugar extraction. The highest total xylose recoveries of 87.2% and 98.7% were obtained for N-11 and T-106 under hydrolysis conditions of 180 degrees C for 50 min and 180 degrees C for 30 min, respectively. Moreover, the T series displayed higher enzymatic digestibility (ED) than the N series. The high degree of branching (arabinose/xylose ratio) and acetyl groups in the hemicellulose chains of T-106 would be expected to accelerate sugar release during the HH process. In addition, negative correlations between ED and the lignin content, crystallinity index (CrI) and syringyl/guaiacyl (S/G) lignin ratio were observed. Furthermore, finding ways to overcome the thickness of the cell wall and heterogeneity of its chemical composition distribution would make cellulose more accessible to the enzyme. (C) 2016 Elsevier Ltd. All rights reserved.
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