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作者

Lei Feng Lei Qin Zhi-Hua Liu Chang-Ying Dong Bing-Zhi Li Ying-Jin Yuan

作者单位

Atherosclerosis Institute of Taishan Medical University, Taian, 271016, China College of Biology Engineering, Jilin Agricultural Science and Technology College, Jilin, 132101, China School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China a Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin, 300072, China

刊名

BioResources

年份

2014

卷号

Vol.9 No.1

页码

24-38

ISSN

1930-2126

关键词

Combined severity Enzymatic hydrolysis PH Pretreatment Temperature Wheat straw

摘要

Acids and alkalis are considered important catalysts in biomass pretreatment, which is essential to overcome the recalcitrance of lignocellulose for sugar release. In this study, the effects of various chemicals and temperatures on the pretreatment and subsequent enzymatic hydrolysis of wheat straw were investigated. The conversions of glucan and xylan during pretreatment and enzymatic hydrolysis were examined. The temperature and different ions in pretreatment govern the dissociation constant a...更多

Acids and alkalis are considered important catalysts in biomass pretreatment, which is essential to overcome the recalcitrance of lignocellulose for sugar release. In this study, the effects of various chemicals and temperatures on the pretreatment and subsequent enzymatic hydrolysis of wheat straw were investigated. The conversions of glucan and xylan during pretreatment and enzymatic hydrolysis were examined. The temperature and different ions in pretreatment govern the dissociation constant and hydrogen ion concentration. Due to higher dissociation at higher temperature, weak acids and weak alkalis can produce high glucose yields, similar to strong acids and alkalis. The concept of modified combined severity for weak acid pretreatment was explored. The pH value and real combined severity of weak acids at reaction temperatures were estimated according to xylan recovery during pretreatment. Glucose yield in enzymatic hydrolysis is mainly decided by xylan recovery for acidic pretreatment and by total content of xylan and acid-insoluble-lignin in solids for alkaline pretreatment.收起

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