Hydrothermal and organic-chemical treatments of eucalyptus biomass for industrial purposes.

Autor: da Silva CMS; Department of Forestry, Universidade Federal de Viçosa, Viçosa, Brazil. Electronic address: karmiguel@yahoo.com.br., Vital BR; Department of Forestry, Universidade Federal de Viçosa, Viçosa, Brazil., Rodrigues FÁ; Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Brazil., de Almeida ÊW; Department of Forestry, Universidade Federal de Viçosa, Viçosa, Brazil., Carneiro ACO; Department of Forestry, Universidade Federal de Viçosa, Viçosa, Brazil., Cândido WL; Department of Forestry, Universidade Federal de Viçosa, Viçosa, Brazil.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2019 Oct; Vol. 289, pp. 121731. Date of Electronic Publication: 2019 Jun 29.
DOI: 10.1016/j.biortech.2019.121731
Abstrakt: This study aimed to evaluate the promising feasibility of the hydrothermal pre-processing of eucalyptus wood and eucalyptus bark under organosolv and organic acid conditions to produce a highly concentrated cellulose feedstock. For that, particulate samples of both biomasses were heated in water solutions containing from 0 to 50% vol/vol of ethanol and from 0 to 50 mmol.L -1 of oxalic acid at temperatures between 140 and 180 °C. Significant differences on the thermal degradation profiles were observed for both biomasses indicating the partial hydrolysis converted them into a more homogeneous solid fraction with higher contents of cellulose. It was also observed a significant variation of the glycan content from approximately 39 to 76% for wood particles, whereas the variation for bark was from 32 to 50%. In general, the proposed pre-processing route was considered potentially feasible to concentrate the cellulose/glycan contents of eucalyptus biomasses for subsequent industrial utilization.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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