Pretreatment Of Oil Palm Fronds Using A Solvent-Ionic Liquid (BMIM) To Enhance Glucose Recovery
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Date
2011-10
Authors
Tan, Hui Teng
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The potential of oil palm frond (OPF) as glucose source for fuel ethanol
production was investigated in this current work. Pretreatment of lignocellulosic
feedstock with a solvent, ionic liquid (IL) 1-butyl-3-methylimidazolium chloride
((BMIM)Cl) was used to facilitate the conversion of OPF into fermentable sugar
(glucose). The pretreatment was accomplished by first subjecting OPF to ionic liquid
treatment, followed by regeneration of cellulose using an anti-solvent. The effects of
several pretreatment variables, such as temperature, retention time and solid loading
on the biomass composition, crystallinity as well as its digestibility by enzyme and
glucose recovery after pretreatment were studied. Results showed that biomass
digestibility and glucose recovery were strongly influenced by the changes in the
biomass structure and composition after pretreatment but not by the crystallinity of
the biomass alone. The pretreatment variables were further optimised using Response
Surface Methodology (RSM) based on a factorial Central Composite Design (CCD).
An optimum 100 % glucose recovery was found with pretreatment conditions of 80
°C, a 15 min retention time and 10 wt% solid loading as oppose to glucose recovery
from raw OPF that was merely 22.57 % under the same conditions. Hence,
pretreatment of lignocellulosic biomass using ionic liquid [BMIM]Cl is one of the
promising techniques to enhance glucose recovery for the production of bio-ethanol.
Description
Keywords
Pretreatment of oil palm fronds , using a solvent-ionic liquid