期刊
BIORESOURCE TECHNOLOGY
卷 152, 期 -, 页码 364-370出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.11.034
关键词
Pretreatment; Dilute acid; Lime; Corn stover; Enzymatic hydrolysis
资金
- National Basic Research Program of China [2012CB215302]
- Key Programs of the Chinese Academy of Sciences [KGZD-EW-304-2]
- Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences [CX2090130020]
In this study, a two stage process was evaluated to increase the sugar recovery. Firstly, corn stover was treated with diluted hydrochloric acid to maximize the xylose yield, and then the residue was treated with lime to alter the lignin structure and swell the cellulose surface. The optimal condition was 120 degrees C and 40 min for diluted hydrochloric acid pretreatment followed by lime pretreatment at 60 degrees C for 12 h with lime loading at 0.1 g/g of substrate. The glucose and xylose yield was 78.0% and 97.0%, respectively, with cellulase dosage at 5 FPU/g of substrate. The total glucose yield increased to 85.9% when the cellulase loading was increased to 10 FPU/g of substrate. This two stage process was effective due to the swelling of the internal surface, an increase in the porosity and a decrease in the degree of polymerization. (C) 2013 Elsevier Ltd. All rights reserved.
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