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Diamine-Crosslinked and Blended Polyimide Membranes: An Emerging Strategy in Enhancing H2/CO2 Separation
Noor Hafizah Mohd Amin1, Mohd Usman Mohd Junaidi1,2, Zulhelmi Amir1,2
1Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia.
Polymers
|March 13, 2025
Summary
Modifying polyimide (PI) membranes via blending and crosslinking enhances hydrogen (H2)/carbon dioxide (CO2) separation. These strategies overcome performance limitations, paving the way for high-purity H2 production.
Area of Science:
- Materials Science
- Chemical Engineering
- Membrane Technology
Background:
- Growing demand for high-purity hydrogen (H2) necessitates efficient gas separation technologies.
- Polyimide (PI) membranes offer thermal stability for H2/CO2 separation but face CO2 plasticization and permeability-selectivity trade-offs.
- Membrane modification through blending and crosslinking is crucial for overcoming PI membrane limitations.
Purpose of the Study:
- To review PI membrane modification methods for H2/CO2 separation.
- To discuss the impact of blending and crosslinking on PI membrane performance.
- To identify critical process parameters and future commercialization strategies for H2/CO2 separation membranes.
Main Methods:
- Literature review of PI membrane modification techniques.
- Analysis of blending and crosslinking strategies for PI membranes.
- Discussion of process parameters influencing membrane performance.
Main Results:
- Blending and crosslinking effectively enhance PI membrane properties for H2/CO2 separation.
- Specific modification methods and critical process parameters are identified.
- Strategies for overcoming performance limitations like CO2 plasticization are presented.
Conclusions:
- Modified PI membranes show significant potential for high-purity H2 production.
- Optimization of blending and crosslinking processes is key to commercial viability.
- This review provides guidelines for advancing membrane technology in renewable energy.
