Short time ionic liquids pretreatment on lignocellulosic biomass to enhance enzymatic saccharification

Uju, Yasuhiro Shoda, Aya Nakamoto, Masahiro Goto, Wataru Tokuhara, Yoshiyuki Noritake, Satoshi Katahira, Nobuhiro Ishida, Kazunori Nakashima, Chiaki Ogino, Noriho Kamiya

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

The potential of 1-buthyl-3-methylpyridinium chloride, [Bmpy][Cl], as a pretreatment solvent for lignocellulosic biomasses, Bagasse and Eucalyptus, was investigated. The yields of regenerated biomasses ranged between 35% and 96%, and varied according to the pretreatment time, type of ionic liquid (IL) and biomass. The pretreatment of the biomass with [Bmpy][Cl] resulted in up to 8-fold increase in the cellulose conversion when compared with the untreated biomass. For a short pretreatment period (i.e., 10. min), [Bmpy][Cl] showed better performance than 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]) with respect to the initial enzymatic saccharification rates. The increase in the reaction rates with [Emim][OAc] treatment was because of a reduction in the cellulose crystallinity. In contrast, a decrease in the crystallinity index was not clearly observed for the biomass pretreated with [Bmpy][Cl], and the enhancement of the enzymatic saccharification rates using this IL is presumably due to a reduction in the degree of polymerization of cellulose in the biomass.

Original languageEnglish
Pages (from-to)446-452
Number of pages7
JournalBioresource Technology
Volume103
Issue number1
DOIs
Publication statusPublished - 2012 Jan 1

Keywords

  • Cellulosic biomass
  • Depolymerization
  • Enzymatic saccharification
  • Ionic liquid
  • Pretreatment

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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