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Pretreatment of sugarcane bagasse by acid-catalysed process in aqueous ionic liquid solutions

Zhang, Zhanying, O'Hara, Ian M., & Doherty, William O.S. (2012) Pretreatment of sugarcane bagasse by acid-catalysed process in aqueous ionic liquid solutions. Bioresource Technology, 120, pp. 149-156.

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Abstract

A biomass pretreatment process was developed using acidified ionic liquid (IL) solutions containing 10-30% water. Pretreatment of sugarcane bagasse at 130°C for 30min by aqueous 1-butyl-3-methylimidazolium chloride (BMIMCl) solution containing 1.2% HCl resulted in a glucan digestibility of 94-100% after 72h of enzymatic hydrolysis. HCl was found to be a more effective catalyst than H(2)SO(4) or FeCl(3). Increasing acid concentration (from 0.4% to 1.2%) and reaction temperature (from 90 to 130°C) increased glucan digestibility. The glucan digestibility of solid residue obtained with the acidified BMIMCl solution that was re-used for three times was >97%. The addition of water to ILs for pretreatment could significantly reduce IL solvent costs and allow for increased biomass loadings, making the pretreatment by ILs a more economic proposition.

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16 citations in Scopus
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16 citations in Web of Science®

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ID Code: 53192
Item Type: Journal Article
Additional URLs:
Keywords: Ionic liquid, Pretreatment, Lignocellulose, Enzymatic hydrolysis
DOI: 10.1016/j.biortech.2012.06.035
ISSN: 0960-8524
Divisions: Current > Research Centres > Centre for Tropical Crops and Biocommodities
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Elsevier Ltd.
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Bioresource Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioresource Technology, [Volume 120, (September 2012)]. DOI: 10.1016/j.biortech.2012.06.035
Deposited On: 20 Aug 2012 09:51
Last Modified: 10 Sep 2013 03:17

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