Surfactant-assisted dilute ethylenediamine fractionation of corn stover for technical lignin valorization and biobutanol production.
Bioresour Technol
; 394: 130231, 2024 Feb.
Article
em En
| MEDLINE
| ID: mdl-38142909
ABSTRACT
In this study, a surfactant-assisted diluted ethylenediamine (EDA) fractionation process was investigated for co-generation of technical lignin and biobutanol from corn stover. The results showed that the addition of PEG 8000 significantly enhanced cellulose recovery (88.9 %) and lignin removal (68.9 %) in the solid fraction. Moreover, the pulp achieved 86.5 % glucose yield and 82.6 % xylose yield in enzymatic hydrolysis. Structural characterization confirmed that the fractionation process promoted the preservation of active ß-O-4 bonds (35.8/100R) in isolated lignin and functionalized the lignin through structural modification using EDA and surfactant grafting. The enzymatic hydrolysate of the pulps yielded a sugar solution for acetone-butanol-ethanol (ABE) fermentation, resulting in an ABE concentration of 15.4 g/L and an overall yield of 137.2 g/Kg of dried corn stalk. Thus, the surfactant-assisted diluted EDA fractionation has the potential to enhance the overall economic feasibility of second-generation biofuels production within the framework of biorefinery.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Zea mays
/
Lignina
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article