Liquid Hot Water Pretreatment for Lignocellulosic Biomass Biorefinery

Zhuang, Xinshu; Wang, Wen; Song, Bing; Yu, Qiang

doi:10.1007/978-3-030-65584-6_4

Cited by 2 publications

(1 citation statement)

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“…In this process, liquid water at high temperatures (150-230 • C) and pressures (P > Psat) fraction materials through hydronium-catalyzed reactions by the hydronium ions generated from water ionization-autohydrolysis [48,49]. Autohydrolysis is considered an environmentally friendly process since it does not require the addition and recovery of chemical reagents, has a low by-product generation, has limited equipment corrosion problems, and is simple to operate, making it one of the main choices for industrial applications [47,50,51]. Furthermore, this process enables a high recovery of cellulose through hemicellulose depolymerization and lignin degradation, consequently increasing the cellulose availability [47,48].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Green and Traditional Routes for Cellulose Extraction from a Sugarcane By-Product

et al. 2023

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Sugarcane bagasse (SCB) is the main residue of the sugarcane industry and a promising renewable and sustainable lignocellulosic material. The cellulose component of SCB, present at 40–50%, can be used to produce value-added products for various applications. Herein, we present a comprehensive and comparative study of green and traditional approaches for cellulose extraction from the by-product SCB. Green methods of extraction (deep eutectic solvents, organosolv, and hydrothermal processing) were compared to traditional methods (acid and alkaline hydrolyses). The impact of the treatments was evaluated by considering the extract yield, chemical profile, and structural properties. In addition, an evaluation of the sustainability aspects of the most promising cellulose extraction methods was performed. Among the proposed methods, autohydrolysis was the most promising approach in cellulose extraction, yielding 63.5% of a solid fraction with ca. 70% cellulose. The solid fraction showed a crystallinity index of 60.4% and typical cellulose functional groups. This approach was demonstrated to be environmentally friendly, as indicated by the green metrics assessed (E(nvironmental)-factor = 0.30 and Process Mass Intensity (PMI) = 20.5). Autohydrolysis was shown to be the most cost-effective and sustainable approach for the extraction of a cellulose-rich extract from SCB, which is extremely relevant for aiming the valorization of the most abundant by-product of the sugarcane industry.

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