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Enhanced delignification of cornstalk by employing superbase TBD in ionic liquids | |
Alternative Title | RSC Adv. |
Xu, Junli1,2; Yao, Xiaoqian1; Zhou, Qing1; Lu, Xingmei1; Zhang, Suojiang1 | |
2014 | |
Source Publication | RSC ADVANCES
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ISSN | 2046-2069 |
Volume | 4Issue:52Pages:27430-27438 |
Abstract | 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.; 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. |
Keyword | Lignocellulosic Biomass Enzymatic-hydrolysis Cellulose Pretreatment Dissolution Wood Lignin Digestibility Extraction Solvents |
Subtype | Article |
WOS Headings | Science & Technology ; Physical Sciences |
DOI | 10.1039/c4ra02510e |
URL | 查看原文 |
Indexed By | SCI |
Language | 英语 |
WOS Keyword | LIGNOCELLULOSIC BIOMASS ; ENZYMATIC-HYDROLYSIS ; CELLULOSE ; PRETREATMENT ; DISSOLUTION ; WOOD ; LIGNIN ; DIGESTIBILITY ; EXTRACTION ; SOLVENTS |
WOS Research Area | Chemistry |
WOS Subject | Chemistry, Multidisciplinary |
WOS ID | WOS:000338643500044 |
Citation statistics | |
Document Type | 期刊论文 |
Version | 出版稿 |
Identifier | http://ir.ipe.ac.cn/handle/122111/10999 |
Collection | 研究所(批量导入) |
Affiliation | 1.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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File Name/Size | DocType | Version | Access | License | ||
Enhanced delignifica(779KB) | 限制开放 | CC BY-NC-SA | Application Full Text | |||
Enhanced delignifica(465KB) | 限制开放 | CC BY-NC-SA | Application Full Text |
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