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题名: Enzymatic hydrolysates of corn stover pretreated by a N-methylpyrrolidone-ionic liquid solution for microbial lipid production
作者: Xie, Haibo1, 2;  Shen, Hongwei1, 2, 3;  Gong, Zhiwei1;  Wang, Qian1;  Zhao, Zongbao K.1, 2;  Bai, Fengwu3
刊名: GREEN CHEMISTRY
发表日期: 2012
DOI: 10.1039/c2gc00033d
卷: 14, 期:4, 页:1202-1210
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: In this study, we reported a novel N-methylpyrrolidone (NMP)-1-ethyl-3-methyl imidazolium acetate (EmimAc) mixed solvent (X-ILs = 0.2, mole fraction of ionic liquids (ILs) in the mixed solution) that can dissolve up to 10 wt% corn stover at 140 degrees C in 60 min. Physiochemical analysis showed major differences in terms of cellulose crystallinity, compositional distribution and surface morphology between raw corn stover samples and the regenerated materials, indicating that dissolution in the NMP-EmimAc system followed by regeneration with anti-solvents could be used as an effective pretreatment technology. Enzymatic saccharification of the regenerated corn stover afforded an 82.9% total reducing sugars yield and a 60.8% glucose yield within 24 h. The hydrolysates were used, without detoxification, as the carbon sources for the cultivation of Rhodosporidium Toruloides Y4 for lipid production. Glucose and xylose in the hydrolysates were both consumed in our process. In a word, our study reported a novel dissolution pretreatment technology for biomass utilization with outstanding advantages compared with traditional pure ionic liquid processes, such as (I) minimal use of expensive ILs in NMP, and commercially available EmimAc and NMP can be used directly without any further dry purification; (II) high cellulose and hemicellulose regeneration; (III) high enzymatic hydrolysis efficiency of the pretreated sample with full conversion of carbohydrates in less than 24 h; (IV) air-dried corn stover can be used directly (water content = similar to 5%); (V) the hydrolysates can be used for further bioconversion and on inhibitory effect was observed. We believe that all of these advantages determine its potential for practical applications.
关键词[WOS]: X-RAY-DIFFRACTION ;  1-N-BUTYL-3-METHYLIMIDAZOLIUM CHLORIDE ;  LIGNOCELLULOSIC BIOMASS ;  CELLULOSE-I ;  RHODOSPORIDIUM-TORULOIDES ;  CATALYZED HYDROLYSIS ;  BIOFUEL PRODUCTION ;  DISSOLUTION ;  ACID ;  BIOREFINERY
语种: 英语
WOS记录号: WOS:000302018600048
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142987
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.CAS, Dalian Inst Chem Phys, Dalian, Peoples R China
2.Dalian Natl Lab Clean Energy, Dalian, Peoples R China
3.Dalian Univ Technol, Sch Life Sci & Biotechnol, Dalian 116023, Peoples R China

Recommended Citation:
Xie, Haibo,Shen, Hongwei,Gong, Zhiwei,et al. Enzymatic hydrolysates of corn stover pretreated by a N-methylpyrrolidone-ionic liquid solution for microbial lipid production[J]. GREEN CHEMISTRY,2012,14(4):1202-1210.
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