Research on fractionation of corn stover to produce fermentable sugar by using choline chloride-based deep eutectic solvents
In order to establish an efficient process for the pretreatment of lignocellulosic biomass to deconstruct the complex structure and improve enzymatic hydrolysis efficiency of polysaccharide fractions, choline chloride(ChCl) and glycerol(Gly) were used to synthesize green deep eutectic solvent(DES) f...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Hebei University of Science and Technology
2025-06-01
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| Series: | Journal of Hebei University of Science and Technology |
| Subjects: | |
| Online Access: | https://xuebao.hebust.edu.cn/hbkjdx/article/pdf/b202503006?st=article_issue |
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| Summary: | In order to establish an efficient process for the pretreatment of lignocellulosic biomass to deconstruct the complex structure and improve enzymatic hydrolysis efficiency of polysaccharide fractions, choline chloride(ChCl) and glycerol(Gly) were used to synthesize green deep eutectic solvent(DES) for corn stover pretreatment.The deconstruction effects of DES on corn stover under different synthesis conditions were compared, and the chemical reagents were added to enhance pretreatment. The results indicate that, pretreatment at 120 ℃ for 3 h by DES (at a molar ratio of 1∶2) with 1% H2SO4 addition improves the glucan content from 33.4% to 51.2%. In this case, the removal rates of xylan and lignin reache up to 86.7% and 39.0%, respectively. After 72 h enzymatic hydrolysis by cellulase, the productions of glucose and fermentable sugars are relatively high, reaching 29.0 g and 30.7 g from 100 g of corn stover. Therefore, the H2SO4-assisted DES system efficiently remove xylan and lignin, which facilitates the improvements of hydrolysis and fermentable sugars production. This study develops a green and high-efficient pretreatment to provide fundamental data and technical support for valorization of renewable and abundant agricultural residues in China. |
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| ISSN: | 1008-1542 |