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Type: Artigo
Title: Acid Post-hydrolysis Of Xylooligosaccharides From Hydrothermal Pretreatment For Pentose Ethanol Production
Author: Nakasu
P. Y. S.; Ienczak
L. J.; Costa
A. C.; Rabelo
S. C.
Abstract: Hydrothermal pretreatment solubilizes about 65% of the hemicelluloses in sugarcane bagasse. However, nearly 80% of the xylose recovered from the hemicellulosic hydrolysate is present as xylooligosaccharides (XO's), which cannot be directly fermented into pentose (C5) ethanol. In this work a kinetic study of the post hydrolysis process considering the use of three acids - sulfuric, oxalic and maleic - was performed. Xylose and furfural post-hydrolysis profiles showed the reaction time in which xylose peaked with minimum furfural production. Among the three studied acids, sulfuric acid showed the fastest kinetics of post-hydrolysis with XO's being fully hydrolyzed in less than 1 h reaction time. C5 fermentation experiments showed that the detoxified post-hydrolysates fermented with ethanol yields ranging from 0.10 to 0.31 g ethanol g(-1) reducing sugars. Most samples were fermented from 48 to 72 h of experiment with productivities ranging from 0.02 to 0.43 g.L-1.h(-1). (C) 2016 Elsevier Ltd. All rights reserved.
Subject: Sugarcane Bagasse
Pentose Ethanol
Hydrothermal Pretreatment
Editor: Elsevier Sci LTD
Rights: fechado
Identifier DOI: 10.1016/j.fuel.2016.07.069
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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