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Fractionation and characterization of lignin from sugarcane bagasse using a sulfuric acid catalyzed solvothermal process
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Document Title
Fractionation and characterization of lignin from sugarcane bagasse using a sulfuric acid catalyzed solvothermal process
Author
Imman S., Khongchamnan P., Wanmolee W., Laosiripojana N., Kreetachat T., Sakulthaew C., Chokejaroenrat C., Suriyachai N.
Name from Authors Collection
Affiliations
School of Energy and Environment, University of Phayao, Tambon Maeka, Amphur Muang Phayao56000, Thailand; National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA)Pathum Thani 12120, Thailand; Joint Graduate School of Energy and Environment (JGSEE), King Mongkut's University of Technology Thonburi, Prachauthit Road, Bangmod, Bangkok, 10140, Thailand; Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok, Thailand; Department of Environmental Technology and Management, Faculty of Environment, Kasetsart University, Bangkok, Thailand
Type
Article
Source Title
RSC Advances
ISSN
20462069
Year
2021
Volume
11
Issue
43
Page
26773-26784
Open Access
Gold, Green
Publisher
Royal Society of Chemistry
DOI
10.1039/d1ra03237b
Abstract
Conversion of lignocellulosic residue to bioenergy and biofuel is a promising platform for global sustainability. Fractionation is an initial step for isolating lignocellulosic components for subsequent valorization. The aim of this research is to develop the solvothermal fractionation of sugarcane bagasse to produce high purity lignin. The physio-chemical structure of isolated lignin from this process was determined. In this study, a central composite design-based response surface methodology (RSM) was used to optimize an acid promoter for isolating lignin from sugarcane bagasse using a solvothermal fractionation process. The reaction was carried out with sulfuric acid, at a concentration of 0.01-0.02 M and a reaction temperature of 180-200 °C for 30-90 min. The optimal conditions for the experiment were obtained at the acid concentration of 0.02 M with a temperature of 200 °C for 90 min in methyl isobutyl ketone (MIBK)/methanol/water (35% : 25% : 40% v/v%). The results showed that 88% of lignin removal was done in the solid phase, while 87% of lignin recovery was conducted in the organic phase. Furthermore, the changes in the physico-chemical characteristics of solid residue and lignin recovery were analyzed using various techniques. GPC analysis of recovered lignin from the organic fraction showed a lowerMw(1374 g mol−1) and polydispersity index (1.75) compared to commercial organosolv lignin. The major lignin degradation temperature of commercial organosolv lignin was estimated to be 410 °C, whereas BGL showed two main degradations at 291 °C and 437 °C, which could point to potential relationships with the degradation of β-O-4 cross-links. The results indicated that recovered lignin was mostly cross-linked by β-O-4 cross-links. In addition, Py-GC/MS and 2D HSQC NMR gave more information regarding the compositional and structural features of recovered lignin. The development of the sulfuric acid catalyzed solvothermal process in this study provides efficient extraction of high-value organosolv lignin from sugarcane bagasse and the production of recovered lignin in the organic phase with low contamination from other contents. The lignin characteristic data can contribute to the development of lignin valorization in value-added applications. © The Royal Society of Chemistry 2021.
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
Thailand Research Fund; University of Phayao
License
CC BY-NC
Rights
Author
Publication Source
Scopus