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Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Lignin modification through steam explosion pretreatment: A comparison with direct organosolv pulping
Nor Najhan Idris1, Nicolas Brosse2, Isabelle Ziegler-Devin2
1Materials Technology Research Group (MaTReC), School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
International Journal of Biological Macromolecules
|March 3, 2025
Summary
Steam explosion pretreatment enhances oil palm frond lignin, increasing yield and antioxidant properties. This modification improves lignin
Area of Science:
- Biomass valorization and lignin chemistry.
Background:
- Oil palm frond (OPF) is a lignocellulosic biomass with potential for value-added products.
- Delignification is crucial for isolating lignin and modifying its properties.
Purpose of the Study:
- To investigate the impact of organosolv and combined organosolv-steam explosion (SE) pretreatments on OPF lignin.
- To characterize the structural and antioxidant properties of isolated lignin.
Main Methods:
- Organosolv and organosolv-SE pretreatments were applied to OPF.
- Lignin structural analysis using FTIR, NMR, GPC, CHN, and thermal analyses.
- Antioxidant activity assessed via reducing power and dissolution tests.
Main Results:
- Steam explosion organosolv lignin (SEOL) yielded 11.5%, higher than organosolv lignin (OL) at 8.7%.
- SEOL exhibited reduced molecular weight and enhanced water solubility (37.4%) compared to OL (17.5%).
- SEOL demonstrated superior antioxidant properties and reducing power.
Conclusions:
- Combined organosolv-SE pretreatment improves OPF lignin yield, structural characteristics, and antioxidant capabilities.
- Modified lignin shows potential for novel applications in various industries.
