Fractionation of Eucalyptus globulus Wood by Glycerol鈥揥ater Pretreatment: Optimization and Modeling

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• 作者：Aloia Roman铆 ; H茅ctor A. Ruiz ; Francisco B. Pereira ; Luc铆lia Domingues ; Jos茅 A. Teixeira
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：October 9, 2013
• 年：2013
• 卷：52
• 期：40
• 页码：14342-14352
• 全文大小：476K
• 年卷期：v.52,no.40(October 9, 2013)
• ISSN：1520-5045

文摘

A glycerol-organosolv process can be a good alternative for Eucalyptus wood fractionation into its main compounds, improving the enzymatic saccharification of the cellulose. A study of process variables - glycerol鈥搘ater percent content, temperature, and process time - was carried out using a Box-Behnken experimental design. The cellulose obtained from pretreated solids was recovered almost quantitatively, leading to a solid with a high percentage of cellulose (77 g/100 g of pretreated solid), low lignin content (9 g/100 g of pretreated solid), and 18% of residual hemicellulose in the solid at 200 掳C, 56% of glycerol鈥搘ater and 69 min. The enzymatic saccharification was enhanced achieving 98% cellulose-to-glucose conversion (under conditions: liquid to solid ratio 20 g/g and enzyme loading 20 FPU/g of solid). This study contributes to the improvement of biomass fractionation by exploring an eco-friendly treatment which allows for almost complete wood fractionation into constituents and high levels of glucose recovery available for subsequent yeast fermentation to bioethanol.