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题名: Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir
作者: Zhang, C.1, 2;  Houtman, C. J.2;  Zhu, J. Y.2
关键词: Low temperature pretreatment ;  Enzymatic hydrolysis/saccharification ;  Sugar degradation/inhibitor formation ;  Kinetics ;  Combined severity/hydrolysis factor ;  Woody biomass
刊名: PROCESS BIOCHEMISTRY
发表日期: 2014-03-01
DOI: 10.1016/j.procbio.2013.12.017
卷: 49, 期:3, 页:466-473
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine ;  Technology
类目[WOS]: Biochemistry & Molecular Biology ;  Biotechnology & Applied Microbiology ;  Engineering, Chemical
研究领域[WOS]: Biochemistry & Molecular Biology ;  Biotechnology & Applied Microbiology ;  Engineering
英文摘要: Comparing analytical results for Sulfite Pretreatment to Overcome the Recalcitrance of Lignocelluloses (SPORL) of Douglas-fir (Pseudotsuga menziesii) at two different temperatures shows that the apparent activation energy of sugar degradation is higher than that of hemicellulose hydrolysis, approximately 161 kJ/mole versus 100 kJ/mole. Thus, one can balance the production of degradation products against hemicellulose hydrolysis and therefore the enzymatic saccharification efficiency of the resultant substrate by changing pretreatment temperature and duration. Specifically, pretreatment at 165 degrees C for 75 min significantly reduced furan formation compared with the pretreatment at 180 degrees C for 30 min while maintaining the same pretreatment severity and therefore the same substrate enzymatic digestibility (SED). Obtaining high SED with Douglas-fir is also limited by lignin content. Fortunately, the bisulfite in SPORL provides delignification activity. By combining kinetic models for hemicelluloses hydrolysis, sugar degradation, and delignification, the performance of pretreatment can be optimized with respect to temperature, duration, acid, and bisulfite loading. The kinetic approach taken in this study is effective to design viable low temperature pretreatment processes for effective bioconversion of lignocelluloses. Published by Elsevier Ltd.
关键词[WOS]: CELLULOSIC ETHANOL-PRODUCTION ;  DILUTE-ACID HYDROLYSIS ;  LODGEPOLE PINE ;  OVERCOME RECALCITRANCE ;  SULFITE PRETREATMENT ;  SEVERITY PARAMETER ;  ENERGY EFFICIENCY ;  BIOCONVERSION ;  FERMENTATION ;  BIOMASS
语种: 英语
WOS记录号: WOS:000334482300016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145881
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.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian, Peoples R China
2.US Forest Serv, USDA, Forest Prod Lab, Madison, WI 53705 USA

Recommended Citation:
Zhang, C.,Houtman, C. J.,Zhu, J. Y.. Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir[J]. PROCESS BIOCHEMISTRY,2014,49(3):466-473.
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