Potential use of pure and diluted choline chloride-based deep eutectic solvent in delignification of oil palm fronds
Document Type
Article
Publication Date
1-1-2019
Abstract
The existence of deep eutectic solvents (DESs) has improved the process of biomass transformation and valorization due to its ability to break down the recalcitrant structure of biomass via delignification. However, the high viscosity of DES is one of the factors that restraints its effectiveness in delignification of biomass. The addition of water was expected to reduce the viscosity of DES and improve the process consequently. This study investigated the effects of water content in the DES (choline chloride:urea in 1:2 M ratio) on delignification of oil palm fronds (OPF), which are underutilized but available abundantly in Malaysia. The pretreatment was carried out at 120 °C for 4 h using DES at a solid-to-liquid ratio of 1:10 (w/v). In terms of lignin removal, 30 vol% of distilled water in DES was determined to achieve the optimal result at 16.31% in delignification of OPF. Delignification of OPF was further confirmed via a series of characterization tests. In comparison with pure DES, the aqueous DES enabled more favorable improvement of lignin removal in a biomass pretreatment. © 2018
Keywords
Biomass valorization, Biorefinery, Green solvent, Lignin, Lignocellulosic biomass, Waste management
Divisions
fac_eng
Funders
Ministry of Higher Education under Fundamental Research Grant Scheme ( FRGS/1/2016/WAB01/MUSM/02/2 ),Long Term Research Grant Scheme ( LRGS/2013/UKM-UKM/PT/01 )
Publication Title
Process Safety and Environmental Protection
Volume
123
Publisher
Institution of Chemical Engineers