| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
High-temperature, Air-compatible Molten Salts, and an Associated Corrosion-resistant Containment Strategy, for Cost-effective and Reliable Heat Transfer and Thermal Energy Storage |
| Author(s) |
Adam S. Caldwell, Grigorios Itskos, Saeed Bagherzadeh, Mario Caccia, Kenneth H. Sandhage |
| On-Site Speaker (Planned) |
Adam S. Caldwell |
| Abstract Scope |
Molten chlorides, such as MgCl2-KCl-based liquids, are being considered as cost-effective fluids for high-temperature (>750oC) heat transfer and thermal energy storage (TES) for Concentrated Solar Power (CSP) plants and other electricity-generating systems. Unfortunately, exposure of such liquids to air at >750oC results in MgCl2 oxidation and liquid contamination with oxygen-bearing species that, in turn, result in changes in the fluid properties and in enhanced corrosion of metal alloys in pipes and storage tanks. While such salt oxidation/contamination and alloy corrosion could be addressed by tight sealing of pipes and storage tanks from air, continuous removal of oxygen-bearing species from the molten salt (e.g., using magnesium as a gettering agent), and active salt monitoring and chemical adjustment, these steps would increase the design complexity and operational cost of CSP plants. In this talk, alternative, cost-effective, air-tolerant high-temperature TES fluids, and a strategy for corrosion-resistant containment of such fluids, will be discussed. |
| Proceedings Inclusion? |
Planned: |