About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technologies and CO2 Management: Resource Efficient Processes
|
| Presentation Title |
Enhancing Calcium Oxide-Based Carbon Capture Cycles by Optimizing Alumina Sources and Phases |
| Author(s) |
Xingyue Ma, Wanlin Wang, Yongqi Sun |
| On-Site Speaker (Planned) |
Yongqi Sun |
| Abstract Scope |
Calcium-based carbon capture is a promising global-warming mitigation strategy due to the high capacity and low cost, but the performance degradation for the particle sintering. To address this, alumina could be used as a support to form calcium aluminates to improve the structure stability. Our study optimized alumina sources and phases to enhance calcium-based sorbents' performance. We found that organic alumina sources (C9H21AlO3 and C15H21AlO6) outperformed inorganic Al2O3, remaining capacities of 0.47 and 0.45 g-CO2/g-sorbent with 79.7% and 75.8% retention over 20 cycles, while CaO@Al2O3 achieved only 0.33 g-CO2/g-sorbent and 58.9% retention. We further found that delta-Al2O3-supported calcium-based sorbents exhibited exceptional cyclic stability, maintaining 0.43 g-CO2/g-sorbent after 50 cycles (or 82.7% retention). Characterizations revealed that this improvement resulted from the transition between Ca3Al2O6 and Ca5Al6O14. An economic assessment highlights the importance of improving heat transfer efficiency for the future commercialization of the calcium-based capture strategy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Composites, Other |