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Short time ionic liquids pretreatment on lignocellulosic biomass to enhance enzymatic saccharification |
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| Authors: | Uju Shoda Yasuhiro Nakamoto Aya Goto Masahiro Tokuhara Wataru Noritake Yoshiyuki Katahira Satoshi Ishida Nobuhiro Nakashima Kazunori Ogino Chiaki Kamiya Noriho |
| Institution: | a Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan b Center for Future Chemistry, Kyushu University, Japan c Bio Fuel Group, Organic Material Engineering Division, Toyota Motor Corporation, Japan d Biotechnology Laboratory, Toyota Central R&D Lbs Inc., Aichi, Japan e Department of Chemical Engineering, Tohoku University, 6-6-07 Aoba-yama, Sendai 980-8579, Japan f Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada, Kobe 657-8501, Japan |
| Abstract: | The potential of 1-buthyl-3-methylpyridinium chloride, Bmpy]Cl], as a pretreatment solvent for lignocellulosic biomasses, Bagasse and Eucalyptus, was investigated. The yields of regenerated biomasses ranged between 35% and 96%, and varied according to the pretreatment time, type of ionic liquid (IL) and biomass. The pretreatment of the biomass with Bmpy]Cl] resulted in up to 8-fold increase in the cellulose conversion when compared with the untreated biomass. For a short pretreatment period (i.e., 10 min), Bmpy]Cl] showed better performance than 1-ethyl-3-methylimidazolium acetate (Emim]OAc]) with respect to the initial enzymatic saccharification rates. The increase in the reaction rates with Emim]OAc] treatment was because of a reduction in the cellulose crystallinity. In contrast, a decrease in the crystallinity index was not clearly observed for the biomass pretreated with Bmpy]Cl], and the enhancement of the enzymatic saccharification rates using this IL is presumably due to a reduction in the degree of polymerization of cellulose in the biomass. |
| Keywords: | Cellulosic biomass Enzymatic saccharification Depolymerization Ionic liquid Pretreatment |
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