Pretreatment of Corn Stover Using Supercritical CO2 with Water-Ethanol as Co-solvent

Supercritical carbon dioxide,with water-ethanol as co-solvent,was applied to pretreat corn stover to enhance its enzymatic hydrolysis.The efficiency of pretreatment was evaluated by the final reducing sugar yield obtained from the enzymatic hydrolysis of cellulose.Under the operation conditions of p...

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Published inChinese journal of chemical engineering Vol. 21; no. 5; pp. 551 - 557
Main Author 吕惠生 任苗苗 张敏华 陈莹
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2013
Subjects
Carbon dioxide
Cellulose
Chemical engineering
Corn
corn stover
Hydrolysis
lignocellulosic biomass
Pretreatment
Scanning electron microscopy
Sugars
supercritical fluid
乙醇
共溶剂
扫描电子显微镜
操作条件
玉米秸秆
秸秆预处理
纤维素酶水解
超临界二氧化碳
lignocellulosic biomass
corn stover
supercritical fluid
pretreatment
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Summary:Supercritical carbon dioxide,with water-ethanol as co-solvent,was applied to pretreat corn stover to enhance its enzymatic hydrolysis.The efficiency of pretreatment was evaluated by the final reducing sugar yield obtained from the enzymatic hydrolysis of cellulose.Under the operation conditions of pretreatment pressure 15 MPa,temperature 180 ℃ and time 1 h,the optimal sugar yield of 77.8℅ was obtained.Scanning electron microscopy（SEM） and chemical composition analysis were applied to the pretreated corn stover.The results showed that the surface morphology and microscopic structure of pretreated corn stover were greatly changed.After the pretreatment,the contents of hemicellulose and lignin were reduced obviously.Thus more cellulose was exposed,increasing the sugar yield.
Bibliography:Lü Huisheng 1,2,REN Miaomiao 1,2,ZHANG Minhua1,2,＊ and CHEN Ying 1,2 1 Key Laboratory for Green Chemical Technology of Ministry of Education,Tianjin 300072,China 2 Tianjin University R＆D Center for Petrochemical Technology,Tianjin 300072,China
Supercritical carbon dioxide,with water-ethanol as co-solvent,was applied to pretreat corn stover to enhance its enzymatic hydrolysis.The efficiency of pretreatment was evaluated by the final reducing sugar yield obtained from the enzymatic hydrolysis of cellulose.Under the operation conditions of pretreatment pressure 15 MPa,temperature 180 ℃ and time 1 h,the optimal sugar yield of 77.8℅ was obtained.Scanning electron microscopy（SEM） and chemical composition analysis were applied to the pretreated corn stover.The results showed that the surface morphology and microscopic structure of pretreated corn stover were greatly changed.After the pretreatment,the contents of hemicellulose and lignin were reduced obviously.Thus more cellulose was exposed,increasing the sugar yield.
11-3270/TQ
corn stover;supercritical fluid;pretreatment;lignocellulosic biomass
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1004-9541
2210-321X
DOI:10.1016/S1004-9541(13)60508-X