A utilization of choline chloride-based deep eutectic solvent integrated with alkaline earth metal hexahydrate in the pretreatment of oil palm fronds
Document Type
Article
Publication Date
2-10-2021
Abstract
Over the past decade, deep eutectic solvents (DESs) have been touted as promising reagents in biomass valorization. This study focused on the novel utilization of type II choline chloride (ChCl)-based DESs by integrating group II metal chloride hexahydrate, namely, calcium chloride hexahydrate (CaCl2 center dot 6H(2)O) and magnesium chloride hexahydrate (MgCl2 center dot 6H(2)O) as the hydrogen bond donors for the pretreatment of oil palm fronds (OPF). Under atmospheric conditions, pretreatment with ChCl:CaCl2 center dot 6H(2)O (125 degrees C and 4.5 h) resulted in dual biomass valorization effects with a delignification of 46.51%, followed by xylose recovery and xylan removal at 54.12% and 78.67%, respectively. Such performance of ChCl:CaCl2 center dot 6H(2)O as a pretreatment solvent expedited the enzymatic glucose (59.31%) and total reducing sugar (63.89%) conversion in the OPF at a subsequent stage. Thus, the characterizations of pretreated OPF samples endorsed the application of type II ChCl-based DESs, particularly, ChCl:CaCl2 center dot 6H(2)O as a propitious approach for ligno-hemicellulose removal in pretreatment.
Keywords
Lignocellulosic biomass pretreatment, Inorganic salt pretreatment, Enzymatic-hydrolysis, Potential use, Hydrogen-peroxide, Banana fibers, Ionic liquid, Extraction, Lignin, Xylose
Divisions
sch_che
Funders
Ministry of Education, Malaysia [FRGS/1/2019/WAB01/MUSM/02/1],Monash University
Publication Title
Industrial & Engineering Chemistry Research
Volume
60
Issue
5
Publisher
Industrial & Engineering Chemistry Research
Publisher Location
1155 16TH ST, NW, WASHINGTON, DC 20036 USA