Deep eutectic solvent and inorganic salt pretreatment of lignocellulosic biomass for improving xylose recovery

Yu Loong Loow, Ta Yeong Wu, Ge Hoa Yang, Lin Yang Ang, Eng Kein New, Lee Fong Siow, Jamaliah Md Jahim, Abdul Wahab Mohammad, Wen Hui Teoh

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Deep eutectic solvents (DESs) have received considerable attention in recent years due to their low cost, low toxicity, and biodegradable properties. In this study, a sequential pretreatment comprising of a DES (choline chloride:urea in a ratio of 1:2) and divalent inorganic salt (CuCl2) was evaluated, with the aim of recovering xylose from oil palm fronds (OPF). At a solid-to-liquid ratio of 1:10 (w/v), DES alone was ineffective in promoting xylose extraction from OPF. However, a combination of DES (120 °C, 4 h) and 0.4 mol/L of CuCl2 (120 °C, 30 min) resulted in a pretreatment hydrolysate containing 14.76 g/L of xylose, remarkably yielding 25% more xylose than the CuCl2-only pretreatment (11.87 g/L). Characterization studies such as FE-SEM, BET, XRD, and FTIR confirmed the delignification of OPF when DES was implemented. Thus, the use of this integrated pretreatment system enabled xylose recoveries which were comparable with other traditional pretreatments.

Original languageEnglish
Pages (from-to)818-825
Number of pages8
JournalBioresource Technology
Volume249
DOIs
Publication statusPublished - 1 Feb 2018

Fingerprint

inorganic salt
Xylose
Eutectics
Biomass
Salts
Palm oil
Recovery
biomass
oil
Delignification
Choline
Urea
urea
Toxicity
scanning electron microscopy
X-ray diffraction
chloride
toxicity
Scanning electron microscopy
liquid

Keywords

  • Biomass valorization
  • Biorefinery
  • Green solvent
  • Hemicellulose
  • Lignin
  • Oil palm fronds

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

Cite this

Deep eutectic solvent and inorganic salt pretreatment of lignocellulosic biomass for improving xylose recovery. / Loow, Yu Loong; Wu, Ta Yeong; Yang, Ge Hoa; Ang, Lin Yang; New, Eng Kein; Siow, Lee Fong; Md Jahim, Jamaliah; Mohammad, Abdul Wahab; Teoh, Wen Hui.

In: Bioresource Technology, Vol. 249, 01.02.2018, p. 818-825.

Research output: Contribution to journalArticle

Loow, Yu Loong ; Wu, Ta Yeong ; Yang, Ge Hoa ; Ang, Lin Yang ; New, Eng Kein ; Siow, Lee Fong ; Md Jahim, Jamaliah ; Mohammad, Abdul Wahab ; Teoh, Wen Hui. / Deep eutectic solvent and inorganic salt pretreatment of lignocellulosic biomass for improving xylose recovery. In: Bioresource Technology. 2018 ; Vol. 249. pp. 818-825.
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