Journal
BIORESOURCE TECHNOLOGY
Volume 101, Issue 21, Pages 8273-8279Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.06.047
Keywords
1-n-Butyl-3-methylimidazolium chloride; Pretreatment; Hydrolysis; Solid acid
Funding
- Korea Ministry of Knowledge Economy [2008-E036-005]
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This study has been focused on developing a cellulose pretreatment process using 1-n-butyl-3-methylimidazolium chloride ([bmim]Cl) for subsequent hydrolysis over Nation (R) NR50. Thus, several pretreatment variables such as the pretreatment period and temperature, and the [bmim]Cl amount were varied. Additionally, the [bmim]Cl-treated cellulose samples were characterized by X-ray diffraction analysis, and their crystallinity index values including Cl(XD), CI(XD-CI) and CI(XD-CII) were then calculated. When correlated with these values, the concentrations of total reducing sugars (TRS) obtained by the pretreatment of native cellulose (NC) and glucose produced by the hydrolysis reaction were found to show a distinct relationship with the [CI(NC)-CI(XD)] and CI(XD-CII) values, respectively. Consequently, the cellulose pretreatment step with [bmim]Cl is to loosen a crystalline cellulose through partial transformation of cellulose I to cellulose II and, furthermore, the TRS release, while the subsequent hydrolysis of [bmim]Cl-treated cellulose over Nation (R) NR50 is effective to convert cellulose II to glucose. (C) 2010 Elsevier Ltd. All rights reserved.
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