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

被引：14

作者：

Cedeno, Fernando Roberto Paz ^{[1
]}

de Siqueira, Breno Belon ^{[1
]}

Chavez, Eddyn Gabriel Solorzano ^{[1
]}

Roldan, Ismael Ulises Miranda ^{[1
]}

Ropelato, Leonardo Moreira ^{[1
]}

Galan, Julian Paul Martinez ^{[2
]}

Masarin, Fernando ^{[1
]}

机构：

[1] Sao Paulo State Univ UNESP, Sch Pharmaceut Sci FCF, Dept Bioproc Engn & Biotechnol, BR-14800903 Araraquara, SP, Brazil

[2] Univ Antioquia UdeA, Sch Nutr & Dietet, Medellin, Colombia

来源：

RENEWABLE ENERGY | 2022年 / 193卷

基金：

巴西圣保罗研究基金会;

关键词：

Eucalyptus by-product; Pretreatment; Cellulose; Lignin; Enzymatic hydrolysis; Cello-oligosaccharides; Glucose; SUGARCANE BAGASSE; PRETREATMENT; BIOMASS; DELIGNIFICATION; LIGNOCELLULOSE; PURIFICATION; CELLULASES; EXTRACTION; WOOD;

D O I：

10.1016/j.renene.2022.05.027

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, a Eucalyptus by-product was fractionated into cellulose and lignin by pretreatment with NaClO2 to obtain alpha-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 alpha-cellulose and cellulose treated with sulfite-NaOH had cellulose contents of 70.1% and 61.1%, respectively. alpha-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.(c) 2022 Elsevier Ltd. All rights reserved.

引用

页码：807 / 820

页数：14

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