About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technologies and CO2 Management: Resource Efficient Processes
|
| Presentation Title |
Optimizing Al2O3 Particle Size to Enhance CO2 Capture Performance of CaO-Based Sorbents |
| Author(s) |
Xingyue Ma, Jangqi Cao, Wanlin Wang, Yongqi Sun |
| On-Site Speaker (Planned) |
Yongqi Sun |
| Abstract Scope |
CaO-based carbon capture is a promising strategy for mitigating global warming due to its high capacity and low cost. However, performance degradation occurs due to particle sintering. To address this, Al2O3 can be used as a structural support to promote the formation of calcium aluminates, thereby enhancing structural stability. In this study, the particle size of Al2O3 was optimized to improve the performance of calcium-based sorbents. It was found that the particle size of Al2O3 significantly influences CO2 capture performance. Among the tested samples, CaO@Al2O3-20 exhibited the best performance, achieving a capture capacity of 0.44 g-CO2/g-sorbent and a conversion rate of 69.8% after 20 cycles. The increased formation of calcium aluminates, as evidenced by XRD, XPS, and solid-state 27Al MAS-NMR analyses, was identified as the main factor contributing to the improved cyclic stability and sintering resistance. This finding aligns with our previous studies, which also emphasized the significant influence of Al2O3 sources and phases on the CO2 capture performance of sorbents. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Composites, Other |