Protic acid resin enhanced 1-butyl-3-methylimidazolium chloride pretreatment of Arundo donax Linn

Bioresour Technol. 2014 Sep:167:574-7. doi: 10.1016/j.biortech.2014.06.049. Epub 2014 Jun 20.

Abstract

To improve the cellulose digestibility of energy crop Arudo donax Linn. with cost-efficient, a novel pretreatment of protic acid resin Amberlyst 35DRY catalyzed inexpensive ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([C4mim]Cl) was developed in this work. The pretreatment was performed at 160°C with [C4mim]Cl for 1.5h, followed by Amberlyst 35DRY catalyzed at 90°C for 1h. The IL-Amberlyst pretreatment was demonstrated to be effective, evidenced by the reduction in cellulose crystallinity (31.4%) and increased porosity caused by extensive swelling the undissolved biomass and partial depolymerization of the longer cellulose chain of the dissolved biomass by Amberlyst. Consequently, a higher glucose yield (92.8%) was obtained than for the single [C4mim]Cl pretreatment (42.8%) at an enzyme loading of 20 FPU/g substrate. Overall, the enhanced pretreatment was competitive by using inexpensive and recyclable IL-Amberlyst 35DRY pretreated system with shorter processing time and reduced enzyme usage.

Keywords: Arundo donax Linn.; Cost-efficient; Depolymerization; Enzymatic hydrolysis; IL-Amberlyst pretreatment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anion Exchange Resins / pharmacology*
  • Biomass
  • Cellulase / metabolism
  • Crystallization
  • Hydrolysis / drug effects
  • Imidazoles / pharmacology*
  • Poaceae / drug effects*

Substances

  • Anion Exchange Resins
  • Imidazoles
  • 1-butyl-3-methylimidazolium chloride
  • Cellulase