Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 139, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2019.111574
Keywords
Ionic liquids; Pretreatment; Lignocellulose; Enzymatic hydrolysis
Categories
Funding
- National Natural Science Foundation of China [1J1662130, 21506027]
- China National Petroleum Corporation [1J1662130]
- Fundamental Research Funds for the Central Universities [DUT17JC34]
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Corn stalk was pretreated by aqueous tetrabutylammonium hydroxide to enhance enzymatic hydrolysis process. The effects of temperature (20-80 degrees C), concentration of tetrabutylammonium hydroxide (10-40 wt%), time (5-60 min) and ratio of solid to liquid (1:4-1:8, wt/wt) were investigated to find the optimal operational condition, which was determined as 20 degrees C, 30 wt%, 20 min and 1:5 respectively. This was a quite mild pretreatment condition resulting in 68.17% enzymatic hydrolysis sugar yield and the removal rate of hemicelluloses and lignin were 23.5% and 31.5% respectively. Besides, the microstructure and crystal structure changes of raw material and pretreated samples were analyzed by scanning electron microscope and X-ray diffraction respectively. Finally, a possible mechanism of pretreatment process was put forward based on the comprehensive analysis.
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