Breaking Boundaries: Innovations in Two- and Three-Dimensional Metal-Organic Framework (MOF)-Based Mixed-Matrix Membranes for Effective Post-Combustion CO2 Capture

Abstract

AbstractThe escalating levels of carbon dioxide (CO2) emissions have warranted countries worldwide to address the undesirable production of anthropogenic CO2. It is anticipated that membrane processes can significantly improve overall CO2 capture performance compared to alternative unit operations (e.g., adsorption, scrubbing) due to the small plant footprint requirement. This comprehensive review focuses on utilising metal-organic frameworks (MOFs) with large porosities and tunable functionalities as filler materials in the fabrication of mixed-matrix membranes (MMMs). The review focuses on different filler configurations, including two-dimensional, three-dimensional, and composites. The separation performance is systematically summarized and compared against the upper bound limit, along with the filler enhancement index (Findex) for performance validation. The review also provides insights into future perspective of MOF-based MMM in gas separation to enhance the practical application and relevance of MMM in addressing global CO2 emissions.

Keywords

• Metal-organic framework
• Mixed-matrix membrane
• CO2 capture
• Gas separation