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Updated: May 7, 2026
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
Low dosage ionic liquid-driven mild and selective lignocellulosic deconstruction of corn stover using biphasic
Yao Zhang1, Qing Zhou2, Guojie Song3
1Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
A novel biphasic system using ionic liquid ([BHEM]mesy) and pentanol efficiently fractionates corn stover. This cost-effective method improves cellulose recovery and lignin removal for better biomass utilization.
Area of Science:
- Biomass Pretreatment
- Green Chemistry
- Renewable Energy
Background:
- Ionic liquids (ILs) are effective lignocellulose solvents but face challenges in separation, utilization, and cost for large-scale applications.
- Single-phase IL pretreatment leads to component mixing, hindering downstream processing and economic viability.
Purpose of the Study:
- To develop a biphasic pretreatment system for efficient corn stover fractionation.
- To overcome limitations of conventional single-phase IL pretreatment, focusing on cost-effectiveness and component separation.
Main Methods:
- A biphasic system combining protic IL [BHEM]mesy with aqueous pentanol was employed.
- Corn stover pretreatment conditions were systematically optimized (IL concentration, pentanol ratio, temperature, time).
- Component analysis, enzymatic hydrolysis, and quantum chemical calculations were performed.
Main Results:
- Optimal conditions (10% IL, 60% pentanol, 140°C, 60 min) yielded 91.6% cellulose in residue with high lignin and hemicellulose removal.
- Enzymatic hydrolysis of biphasic pretreated residues surpassed single-component pretreatment.
- The system achieved 70.8% xylose dissolution in the aqueous phase and 82.9% lignin recovery in the organic phase.
Conclusions:
- The IL-pentanol biphasic system offers a cost-effective and efficient approach for lignocellulose pretreatment.
- This method facilitates high-value utilization of biomass components by improving separation and recovery.
- Reduced IL consumption and enhanced reactivity highlight the system's potential for industrial application.
