Advances in H2-selective metallic membranes for pre-combustion CO2 capture: A critical review

Abstract

This review provides a comprehensive analysis of the latest development of hydrogen (H2)-selective metallic membranes for pre-combustion carbon dioxide (CO2) capture. Highlighting the essential role of these membranes in CO2 capture and storage technologies, we detail the membrane performance through the measurement of H2 permeability under different operating conditions (i.e., temperature and pressure). Our assessments cover the advancement in alloy compositions, surface treatments, and manufacturing techniques to achieve improved membrane performance. Apart from this, in this review, we discuss the challenges encountered in fabricating metallic membranes, such as embrittlement, sulfur contamination, and high production costs, while suggesting potential solutions to these issues. Last but not least, future research direction for metallic membranes is proposed to emphasize the important strategies in developing these membranes in a scalable and cost-effective manner.

Keywords

• H2-selective membranes
• Pre-combustion CO2 capture
• Metallic membranes
• Pure metallic membranes
• Binary metal alloys
• Ternary metal alloy