Aluminum combustion in <scp>CO₂</scp> and alumina recycling for renewable energy storage

Abstract This narrative review explores the potential of aluminum (Al) combustion in carbon dioxide (CO 2 ) environments as a novel approach to renewable energy storage and carbon capture. The exothermic reaction between Al and CO 2 generates aluminum oxide (Al 2 O 3 ) and carbon monoxide (CO), offering a CO 2 ‐utilizing system that could contribute to net‐zero emissions. By harnessing the energy released from this reaction and the further oxidation of CO to CO 2 to drive power cycles, this method provides a renewable, CO 2 ‐free alternative to conventional fossil fuel‐based energy storage. A critical aspect of this process is the efficient recycling of Al 2 O 3 , which can be performed using surplus renewable energy, ensuring a closed‐loop system. While promising, challenges such as high operational temperatures, an incomplete understanding of combustion dynamics, and the large energy costs of recycling Al 2 O 3 remain. This review emphasizes the need for further research into optimizing combustion conditions and developing advanced alumina recycling technologies. By integrating renewable‐powered recycling and CO 2 utilization, this system presents a potential solution for sustainable energy storage and greenhouse gas mitigation.