Potential use of pure and diluted choline chloride-based deep eutectic solvent in delignification of oil palm fronds

New, Eng Kein and Wu, Ta Yeong and Tien Loong Lee, Cornelius Basil and Poon, Zi Yet and Loow, Yu-Loong and Wei Foo, Luther Yang and Procentese, Alessandra and Siow, Lee Fong and Teoh, Wen Hui and Nik Daud, Nik Norsyahariati and Jahim, Jamaliah Md. and Mohammad, Abdul Wahab (2019) Potential use of pure and diluted choline chloride-based deep eutectic solvent in delignification of oil palm fronds. Process Safety and Environmental Protection, 123. pp. 190-198. ISSN 0957-5820, DOI https://doi.org/10.1016/j.psep.2018.11.015.

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Official URL: https://doi.org/10.1016/j.psep.2018.11.015


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

Item Type: Article
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 )
Uncontrolled Keywords: Biomass valorization; Biorefinery; Green solvent; Lignin; Lignocellulosic biomass; Waste management
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 20 Feb 2020 02:01
Last Modified: 20 Feb 2020 02:01
URI: http://eprints.um.edu.my/id/eprint/23861

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