Cellulose pretreatment with 1-n-butyl-3-methylimidazolium chloride for solid acid-catalyzed hydrolysis.
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(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 CI(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 Nafion(R) NR50 is effective to convert cellulose II to glucose.
Kim
Soo-Jin
SJ
Clean Energy Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea.
Dwiatmoko
Adid Adep
AA
Choi
Jae Wook
JW
Suh
Young-Woong
YW
Suh
Dong Jin
DJ
Oh
Moonhyun
M
D002384:Catalysis / Q000187:drug effects; D002482:Cellulose / Q000378:metabolism*; D003460:Crystallization; D005465:Fluorocarbon Polymers / Q000494:pharmacology*; D006868:Hydrolysis / Q000187:drug effects; D007093:Imidazoles / Q000494:pharmacology*; D052578:Ionic Liquids / Q000494:pharmacology; D010084:Oxidation-Reduction / Q000187:drug effects; D013696:Temperature; D013997:Time Factors
D005465:Fluorocarbon Polymers; D007093:Imidazoles; D052578:Ionic Liquids; C040402:perfluorosulfonic acid; C502841:1-butyl-3-methylimidazolium chloride; D002482:Cellulose