Recovery of cellulose and lignin from Eucalyptus by-product and assessment of cellulose enzymatic hydrolysis

Fernando Roberto Paz Cedeno, Breno Belon de Siqueira, Eddyn Gabriel Solorzano Chavez, Ismael Ulises Miranda Roldán, Leonardo Moreira Ropelato, Julián Paul Martínez Galán and Fernando Masarin

Renewable Energy, 2022, vol. 193, issue C, 807-820

Abstract: In this study, a Eucalyptus by-product was fractionated into cellulose and lignin by pretreatment with NaClO2 to obtain α-cellulose, and hydrothermal pretreatment followed by sulfite-NaOH to obtain cellulose and lignin. The recovered celluloses were chemically and structurally characterized and enzymatically hydrolyzed using commercial enzyme preparations. The α-cellulose and cellulose treated with sulfite-NaOH had cellulose contents of 70.1% and 61.1%, respectively. α-cellulose hydrolyzed with Celluclast showed potential for cello-oligosaccharides formation, resulting in a maximum conversion of 30%, while Cellic CTec 2 resulted in 100% conversion to glucose, whereas cellulose treated with sulfite-NaOH showed potential for conversion to glucose with Cellulcast (44%) and Cellic CTec 2 (78%). The liquor from the sulfite-NaOH process resulted in a 20.8% yield of sulfonated lignin recovery. The use of different pretreatment techniques for the Eucalyptus by-product can be alternatives for the generation of products with high added value and commercial potential, such as cello-oligosaccharides, glucose, and sulfonated lignin.

Keywords: Eucalyptus by-product; Pretreatment; Cellulose; Lignin; Enzymatic hydrolysis; Cello-oligosaccharides; Glucose (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:193:y:2022:i:c:p:807-820

DOI: 10.1016/j.renene.2022.05.027

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