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Updated: Feb 28, 2026
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Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
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Efficient dehydration and recovery of ionic liquid after lignocellulosic processing using pervaporation.
Jian Sun1,2, Jian Shi1,2,3, N V S N Murthy Konda1,4
1Deconstruction Division, Joint BioEnergy Institute, Emeryville, CA 94608 USA.
Biotechnology for Biofuels
|June 23, 2017
Summary
Pervaporation efficiently recovers and recycles ionic liquids (ILs) for biomass pretreatment. This scalable membrane process achieves high purity and demonstrates economic viability for biorefineries.
Area of Science:
- Biotechnology
- Chemical Engineering
- Separation Science
Background:
- Ionic liquids (ILs) enable efficient biomass pretreatment for high fermentable sugar yields.
- Scalable and affordable IL recovery and recycling are critical for commercial viability.
- Pervaporation (PV) offers a selective and scalable membrane process for IL dehydration.
Purpose of the Study:
- To evaluate a commercial pervaporation (PV) system for dehydrating and recycling 1-ethyl-3-methylimidazolium acetate ([C2C1Im][OAc]).
- To assess the efficiency and scalability of PV in an integrated IL biomass pretreatment process.
- To validate the economic potential of PV for IL recovery in biorefineries.
Main Methods:
- Commercial pervaporation (PV) system evaluation.
- Dehydration and recycling of 1-ethyl-3-methylimidazolium acetate ([C2C1Im][OAc]).
- Technoeconomic analysis of the PV process.
Main Results:
- PV separation factors reached as high as 1500.
- >99.9 wt% [C2C1Im][OAc] recovered from aqueous solutions (≤20 wt% IL).
- [C2C1Im][OAc] was successfully recycled five times with high purity.
Conclusions:
- PV is a highly effective method for recovering and recycling ILs.
- The commercial viability of PV for IL recovery in biomass pretreatment is established.
- PV enhances biorefinery economics by minimizing IL losses compared to other technologies.
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