Journal
BIORESOURCE TECHNOLOGY
Volume 260, Issue -, Pages 417-420Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.03.117
Keywords
Lignocellulosic biomass; Ionic liquids; Pretreatment; Alkaline solution; RSM
Funding
- National Natural Science Foundation of China, China [21373078]
- Key R & D Program of Henan Province, China [162102310416]
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In the present work, the pretreatment of corn stalk with the solution of 1-ethyl-3-methylimidazolium acetate ([Emim] Ac) ionic liquid containing NaOH was explored for its lignin removal. The effects of reaction temperature, reaction time, and solid-liquid ratio on the lignin removal efficiency were determined by the response surface methodology (RSM). The pretreatment conditions were optimized by the Box-Behnken design and the comparative study of the composition and structure of corn straw before and after the pretreatment to be: reaction temperature 98.5 degrees C, reaction time 1.31 h, and solid-liquid ratio 1: 8.7. Under the optimized conditions, the cellulose and hemicellulose contents of the corn straw were increased to 85.69% and 9.1%, respectively, and the lignin content was reduced to 2.27% with the lignin removal efficiency up to 87.4%.
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