Electrochemical Investigation of Moisture Byproducts in Molten Calcium Chloride
Residual water in molten CaCl2reacts to form different byproducts, such as HCl, which can impact the corrosivity of the salt and efficiency of electrochemical operations, such as electrolytic oxide reduction and electrorefining. The ability to detect and quantify these byproducts electrochemically can provide feedback on the efficacy of vacuum drying and other purification methods, as well as the impact of these byproducts on process operations. An electrochemical signal’s association with the production of H2is verified and characterized using cyclic voltammetry (CV) and residual gas analysis. CV estimated a 2-electron exchange process associated with H2production. CV detected trace quantities of an oxidized species containing hydrogen in the salt on the order of 10 ppm. Different salt handling methods were compared for their impact on the hydrogen electrochemical signal. It was found that 30 min of exposure of CaCl2in a beaker to low-humidity air (<20%) had minimal impact on the H2production signal.
- Research Organization:
- Savannah River National Laboratory (SRNL), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- 89303321CEM000080
- OSTI ID:
- 2582825
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 9 Vol. 171; ISSN 0013-4651
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electroanalytical Measurements of Oxide Ions in Molten CaCl2 on W electrode