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Bioresour Technol. 2013 Aug;142:579-84. doi: 10.1016/j.biortech.2013.05.091. Epub 2013 May 29.

Liquefaction of sawdust in 1-octanol using acidic ionic liquids as catalyst.

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  • 1College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China.


Acidic ionic liquids (AILs) as a novel catalyst in biomass liquefaction can accord with the demand of green chemistry and enhance the development of biomass thermal chemical conversion. A series of AILs containing HSO4- were synthesized by the imidazolium cation functionalization and applied to the Chinese fir sawdust liquefaction in 1-octanol in this paper. The experimental results showed that the liquefaction rate was gradually improved with the AILs acidity increasing, and reached 71.5% when 1-(4-sulfobutyl)-3-methylmidazolium hydrosulfate was used as catalyst with the 6:1 mass ratio of 1-octanol to sawdust at 423K after 60 min. Lignin, hemicellulose and cellulose were orderly desquamated, and then depolymerized and liquefied with the catalyst acidity increasing in the sawdust liquefaction process. The light oil was mainly composed of the octyl ether and the octyl ester compounds, suggesting that the solvent may play an important role in producing the high octane rating biofuel.

Copyright © 2013 Elsevier Ltd. All rights reserved.


Acidic ionic liquid; Catalyst; Liquefaction; Sawdust

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