Optimizing the Operational Parameters of an Electrochemical Purification Cell for Corrosion Mitigation in CSP Plants During Operation: Preprint
To make concentrating solar power (CSP) cost-competitive, the next generation of CSP plants will increase efficiency by operating at a higher temperature, which will require a new thermal energy storage material. One option for the thermal energy storage material is a ternary chloride salt that is stable at the temperatures required, but reacts easily with the atmosphere to form MgOHCl, a corrosive impurity. If left unchecked, this impurity will corrode the containment alloys, potentially leading to dangerous spills. We are working to design an electrochemical purification cell to remove MgOHCl from the molten chloride salt during CSP plant operation. In this paper, we use predictive modeling to assess the rate at which purification must occur. Additionally, we analyze possible process flow pathways for the molten chloride salts. Ultimately, we determine that implementation of a single reactor through which all chloride salts flow is the most efficient design to reduce impurity concentration below 0.1 mol % impurity.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- Mines/NREL Advanced Energy Systems Graduate Program; USDOE Office of Science (SC), Office of Workforce Development for Teachers and Scientists (WDTS), Science Undergraduate Laboratory Internships (SULI) Program
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1874257
- Report Number(s):
- NREL/CP-5500-80084; MainId:42287; UUID:5c6f8e9f-f9ed-4c41-8efd-3ea91992ad05; MainAdminID:64737
- Country of Publication:
- United States
- Language:
- English
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