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Pretreatment of corn stover by acidic and basic choline chloride solutions for enzymatic hydrolysis
Qi, Benkun1; Wang, Zhenwu1; Luo, Jianquan1,2; Wan, Yinhua1,2
2021-11-01
Source PublicationCELLULOSE
ISSN0969-0239
Volume28Issue:16Pages:10127-10141
AbstractAs a cheap, biodegradable, and nontoxic chemical, choline chloride (ChCl) is widely used in animal feed. In this study, acid and alkali catalyzed ChCl pretreatments of corn stover (CS) were investigated. Compared with single aqueous ChCl pretreatment, H2SO4 acidified aqueous ChCl pretreatment was more effective in removing lignin (69.5%) and xylan (84.9%). NaOH alkalified aqueous ChCl pretreatment demonstrated better performance of delignification (76.8%) but weaker capability of removing xylan (46.2%) than acidified aqueous ChCl pretreatment. Following enzymatic digestibility of pretreated CS, glucose yield from acidified ChCl pretreatment was 72.1%, significantly lower than that of alkalified ChCl pretreatment (89.4%). However, the highest glucose yield of 98.6% resulted from solitary alkali pretreatment. Correlation studies between change in physico-chemical properties of pretreated solids and corresponding enzymatic digestibility indicated high delignification and bigger cellulose crystallite size were mainly responsible for high enzymatic hydrolysis efficiency. Additionally, the properties of extracted lignin from single and combined pretreatments with ChCl and alkali or acid were analyzed. Acidified ChCl pretreatment increased, whereas alkaline ChCl pretreatment decreased molecular weight and phenolic hydroxyl groups of separated lignin in comparison to individual acid and alkali pretreatment. These findings would provide useful information in understanding biomass pretreatments with aqueous ChCl.
KeywordCholine chloride Pretreatment Enzymatic hydrolysis Corn stover
DOI10.1007/s10570-021-04163-4
Language英语
WOS KeywordDEEP EUTECTIC SOLVENTS ; ALKALINE ; EXTRACTION ; CELLULOSE
Funding ProjectNational Key R&D Program of China[2018YFB1501701] ; Science and Technology Service Network Program of Chinese Academy of Sciences[KFJ-STS-QYZX-096]
WOS Research AreaMaterials Science ; Polymer Science
WOS SubjectMaterials Science, Paper & Wood ; Materials Science, Textiles ; Polymer Science
Funding OrganizationNational Key R&D Program of China ; Science and Technology Service Network Program of Chinese Academy of Sciences
WOS IDWOS:000698166300001
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50267
Collection中国科学院过程工程研究所
Corresponding AuthorQi, Benkun; Wan, Yinhua
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Dept Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Qi, Benkun,Wang, Zhenwu,Luo, Jianquan,et al. Pretreatment of corn stover by acidic and basic choline chloride solutions for enzymatic hydrolysis[J]. CELLULOSE,2021,28(16):10127-10141.
APA Qi, Benkun,Wang, Zhenwu,Luo, Jianquan,&Wan, Yinhua.(2021).Pretreatment of corn stover by acidic and basic choline chloride solutions for enzymatic hydrolysis.CELLULOSE,28(16),10127-10141.
MLA Qi, Benkun,et al."Pretreatment of corn stover by acidic and basic choline chloride solutions for enzymatic hydrolysis".CELLULOSE 28.16(2021):10127-10141.
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