Membrane-Based Technologies for Post-Combustion CO₂ Capture from Flue Gases: Recent Progress in Commonly Employed...

Area of Science:

• Environmental Science
• Chemical Engineering
• Materials Science

Background:

• Carbon dioxide (CO2) is a major greenhouse gas (GHG) from fossil fuels.
• Carbon Capture, Utilization, and Storage (CCUS) technologies are vital for emissions reduction.
• Post-combustion CO2 capture methods include chemical absorption, adsorption, cryogenic, and membrane separation.

Purpose of the Study:

• To review the current state of membrane-based technologies for CO2 capture from flue gases.
• To focus on recent advancements in membrane materials for CO2 separation.
• To discuss challenges and future prospects of membrane implementation in CCUS.

Main Methods:

• Review of existing literature on post-combustion CO2 capture technologies.
• Focus on membrane separation processes and materials.
• Analysis of recent progress in composite and mixed-matrix membranes (MMMs).

Main Results:

• Recent advancements involve novel membrane materials such as metal-organic frameworks (MOFs), carbon molecular sieves (CMSs), nanocomposite membranes, ionic liquid (IL)-based membranes, and facilitated transport membranes (FTMs).
• These materials, often in MMMs, offer improved selectivity and permeability for CO2 capture.
• Progress in material science enhances the efficiency of CO2 separation.

Conclusions:

• Membrane technology is a promising approach for post-combustion CO2 capture.
• Advanced materials like MOFs and CMSs are key to improving membrane performance.
• Further research is needed to address challenges and facilitate large-scale implementation of membrane-based CCUS.