This study has been focused on developing a cellulose pretreatment process using 1- n-butyl-3-methylimidazolium chloride ([bmim]Cl) for subsequent hydrolysis over Nafion® 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 CI(XD), CI(XD-C. I) and CI(XD-C. II) 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-C. II) 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 Nafion® NR50 is effective to convert cellulose II to glucose.
Bibliographical noteFunding Information:
The financial support by the Korea Ministry of Knowledge Economy (Project No. 2008-E036-005 ) is greatly acknowledged.
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal