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Enhanced delignification of cornstalk by employing superbase TBD in ionic liquids
Alternative TitleRSC Adv.
Xu, Junli1,2; Yao, Xiaoqian1; Zhou, Qing1; Lu, Xingmei1; Zhang, Suojiang1
2014
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume4Issue:52Pages:27430-27438
AbstractThe delignification of cornstalk was efficiently accomplished by using 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as an additive in 1-allyl-3-methylimidazolium acetate ([Amim][OAc]). When 1.0 wt% TBD was added to [Amim][OAc], the cellulose and lignin contents of cellulose rich material (CRM) were achieved to be 39.12% and 6.74%, respectively. With the addition of 0.1 wt% TBD to [Amim][OAc], the lignin content of CRM could even be reduced to 2.06% without considering the cellulose content. There could be two possible reasons for the enhanced delignification of cornstalk by adding TBD in [Amim][OAc]. One is the alkalinity and exposed nitrogen atoms of TBD, which make it an efficient dibasic nucleophile and helpful for the lignin beta-O-4 ether bond cleavage reaction. The other one is the decreased interaction energy of [Amim](+) and [OAc](-) from 99.1 kcal mol(-1) to 89.2 kcal mol(-1) with the addition of TBD, which makes the [Amim](+) and [OAc](-) easier to interact with the cornstalk components. Simultaneously, the CRM regenerated from the system of [Amim][OAc] + TBD was effectively hydrolyzed by cellulase with 98% enzymatic hydrolysis yield, which proved that the cellulose structures were highly disrupted and lignin was significantly removed in the CRM.; The delignification of cornstalk was efficiently accomplished by using 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as an additive in 1-allyl-3-methylimidazolium acetate ([Amim][OAc]). When 1.0 wt% TBD was added to [Amim][OAc], the cellulose and lignin contents of cellulose rich material (CRM) were achieved to be 39.12% and 6.74%, respectively. With the addition of 0.1 wt% TBD to [Amim][OAc], the lignin content of CRM could even be reduced to 2.06% without considering the cellulose content. There could be two possible reasons for the enhanced delignification of cornstalk by adding TBD in [Amim][OAc]. One is the alkalinity and exposed nitrogen atoms of TBD, which make it an efficient dibasic nucleophile and helpful for the lignin beta-O-4 ether bond cleavage reaction. The other one is the decreased interaction energy of [Amim](+) and [OAc](-) from 99.1 kcal mol(-1) to 89.2 kcal mol(-1) with the addition of TBD, which makes the [Amim](+) and [OAc](-) easier to interact with the cornstalk components. Simultaneously, the CRM regenerated from the system of [Amim][OAc] + TBD was effectively hydrolyzed by cellulase with 98% enzymatic hydrolysis yield, which proved that the cellulose structures were highly disrupted and lignin was significantly removed in the CRM.
KeywordLignocellulosic Biomass Enzymatic-hydrolysis Cellulose Pretreatment Dissolution Wood Lignin Digestibility Extraction Solvents
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c4ra02510e
URL查看原文
Indexed BySCI
Language英语
WOS KeywordLIGNOCELLULOSIC BIOMASS ; ENZYMATIC-HYDROLYSIS ; CELLULOSE ; PRETREATMENT ; DISSOLUTION ; WOOD ; LIGNIN ; DIGESTIBILITY ; EXTRACTION ; SOLVENTS
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000338643500044
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10999
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Coll Chem & Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xu, Junli,Yao, Xiaoqian,Zhou, Qing,et al. Enhanced delignification of cornstalk by employing superbase TBD in ionic liquids[J]. RSC ADVANCES,2014,4(52):27430-27438.
APA Xu, Junli,Yao, Xiaoqian,Zhou, Qing,Lu, Xingmei,&Zhang, Suojiang.(2014).Enhanced delignification of cornstalk by employing superbase TBD in ionic liquids.RSC ADVANCES,4(52),27430-27438.
MLA Xu, Junli,et al."Enhanced delignification of cornstalk by employing superbase TBD in ionic liquids".RSC ADVANCES 4.52(2014):27430-27438.
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