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http://dx.doi.org/10.12925/jkocs.2019.36.4.1243

Optimization of KOH pretreatment conditions from Miscanthus using high temperature and extrusion system  

Cha, Young-Lok (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Park, Sung-Min (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Moon, Youn-Ho (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Kim, Kwang-Soo (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Lee, Ji-Eun (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Kwon, Da-Eun (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Kang, Yong-Gu (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Publication Information
Journal of the Korean Applied Science and Technology / v.36, no.4, 2019 , pp. 1243-1252 More about this Journal
Abstract
The purpose of this study is to investigate the optimum conditions of biomass pretreatment with potassium hydroxide (KOH) for efficient utilization of cellulose, hemicellulose and lignin from Miscanthus. The optimization of variables was performed by response surface methodology (RSM). The variation ranges of the parameters for the RSM were potassium hydroxide 0.2~0.8 M, reaction temperature 110~190℃ and reaction time 10~90 min. The optimum conditions of alkali pretreatment from Miscanthus were determined as follows: concentration of KOH 0.47 M, reaction temperature 134℃ and reaction time 65 min. At the optimum conditions, the yield of cellulose from the solid fraction after pretreatment was predicted to be 95% by model prediction. Finally, 66.1 ± 1.1% of cellulose were obtained by verification experiment under the optimum conditions. The order contents of solid extraction were hemicellulose 26.4 ± 0.4%, lignin 3.7 ± 0.1% and ash 0.5 ± 0.04%. The yield of ethanol concentration of 96% was obtained using separated saccharification and fermentation.
Keywords
Miscanthus; KOH pretreatment; RSM; saccharification; fermentation; bioethanol;
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