Enhancement of ethanol production from spruce wood chips by ionic liquid pretreatment

Marzieh Shafiei, Hamid Zilouei, Akram Zamani, Mohammad J. Taherzadeh and Keikhosro Karimi

Applied Energy, 2013, vol. 102, issue C, 163-169

Abstract: Pretreatment with three green cellulose solvents, N-methylmorpholine-N-oxide (NMMO), 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]), and 1-butyl-3-methylimidazolium acetate ([BMIM][OAc]) were used for improvement of ethanol production. Spruce chips and powder were pretreated at 120°C for 1, 3, and 15h. In order to investigate the efficiency of the pretreatments, the pretreated materials were subjected to enzymatic hydrolysis at 45°C for 72h, followed by fermentation with Saccharomyces cerevisiae at 32°C for 24h. The best results were obtained from 15h pretreatment with [EMIM][OAc]. The ethanol yield from the untreated spruce chips and powder were 2.7% and 9.7% of the maximum theoretical yield, respectively, whereas pretreatment of these materials with [EMIM][OAc] improved the ethanol yield to 66.8% and 81.5%, respectively.

Keywords: Enzymatic hydrolysis; Fermentation; Ionic liquid; NMMO; Pretreatment (search for similar items in EconPapers)
Date: 2013
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Citations: View citations in EconPapers (11)

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DOI: 10.1016/j.apenergy.2012.05.060

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