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Efficient pretreatment using dimethyl isosorbide as a biobased solvent for potential complete biomass valorization.
- Source :
- Green Chemistry; 5/21/2022, Vol. 24 Issue 10, p4082-4094, 13p
- Publication Year :
- 2022
-
Abstract
- An efficient and sustainable pretreatment, such as organosolv pretreatment that produces high-quality lignin and highly digestible carbohydrates, could enable the potential complete utilization of lignocellulosic biomass. Demand for bio-based solvents with a high boiling point, low viscosity, and negligible toxicity is increasing. Herein, we report the use of dimethyl isosorbide (DMI) as a solvent to fractionate lignocellulosic biomass into its main components for the first time. High lignin removal efficiency (91.2%) with good cellulose retention (around 80%) could be achieved during the pretreatment of Eucalyptus by DMI/H<subscript>2</subscript>O co-solvents under a mild conditions. A near-complete cellulose conversion to its monosaccharide could be realized at a relatively low enzyme loading of 20 FPU g<superscript>−1</superscript> glucan. The addition of water could suppress the condensation of lignin, yielding lignin with high purity (92.9%), a good fraction of β-O-4 linkages reserved (24.8%) and homogeneous molecular weight (Đ < 2). Besides its highly digestible nature, the high quality of the cellulose-rich residue is also demonstrated from a material perspective. A more efficient fibrillation of obtained pulp to nanocellulose was developed, leading to a promising potential of energy saving compared to the traditional bleaching pathway. Overall, this work developed a mild pretreatment technology as a potential basis for a green and closed-loop biorefinery concept for converting lignocellulosic biomass to multiple products (high purity lignin, fermentable sugars, or functional materials). [ABSTRACT FROM AUTHOR]
- Subjects :
- LIGNINS
LIGNOCELLULOSE
MOLECULAR weights
BIOMASS
ETHANES
BOILING-points
SOLVENTS
Subjects
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 24
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 157034107
- Full Text :
- https://doi.org/10.1039/d2gc00409g