Advanced Porous Materials in Mixed Matrix Membranes for CO₂ Capture

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Membrane-based CO2 separation offers energy efficiency and cost-effectiveness.
• Mixed matrix membranes (MMMs) integrate porous fillers into polymer matrices to improve performance.
• Conventional membranes face limitations in permeability-selectivity trade-off and stability.

Purpose of the Study:

• To review recent advances in advanced porous material-based MMMs for CO2 capture.
• To highlight filler design strategies and their impact on MMM performance.
• To critically assess separation performances for various gas pairs and identify future opportunities.

Main Methods:

• Comprehensive literature review of advanced porous material-based MMMs.
• Systematic discussion of filler types: MOFs, COFs, HOFs, POPs, POCs, MOCs.
• Analysis of filler design strategies: functionalization, interfacial modification, structural engineering, and defect control.

Main Results:

• Advanced porous materials significantly enhance MMMs for CO2 capture.
• Various filler design strategies effectively improve interfacial compatibility and reduce defects.
• Recent MMMs show promising separation performance for CO2/CH4, CO2/N2, and H2/CO2 gas pairs.

Conclusions:

• Advanced porous material-based MMMs are crucial for efficient CO2 capture.
• Optimized filler design and interfacial engineering are key to overcoming membrane limitations.
• Further research is needed for membrane scalability, long-term stability, and industrial application.