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Efficient pretreatment of bagasse at high loading in an ionic liquid

Aung, Ei Mon, Endo, Takatsugu, Fujii, Shunsuke, Kuroda, Kosuke, Ninomiya, Kazuaki, Takahashi, Kenji
Industrial crops and products 2018 v.119 pp. 243-248
acetates, acid hydrolysis, bagasse, biomass, biorefining, cellulose, crystal structure, ionic liquids, lignocellulose
A high biomass loading in ionic liquid (IL) pretreatments that reduces the total cost of the process is potentially a key technique in biorefining. Previously, we demonstrated that, with microcrystalline cellulose, a higher cellulose loading could lead to improved accessibility and consequently higher hydrolytic reactivity, when catalyzed by an acid. In this study, we expand this concept to the lignocellulosic biomass such as bagasse. The pretreatment of bagasse was performed with a representative IL,1-ethyl-3-methylimidazolium acetate, over a biomass loading range of 5–50 wt% and was subsequently subjected to crystallinity measurements and acid hydrolysis. The results indicated a criterion of the pretreatment condition, which showed a higher pretreatment efficiency at a higher biomass loading. At the optimum pretreatment condition, the hydrolytic reactivity for 33 wt% biomass loading was 1.4 times higher than that at the conventional loading of 5 wt%. This concurred with the results that demonstrated a high biomass loading condition produces a lower crystallinity.