The corrosion of chromium species in molten (Li/K)2CO3 and (Li/Na/K)2CO3 are investigated by spectrophotometry. A strong charge-transfer absorption band is observed in the ultraviolet region with λmax = 372 nm, and the molar absorptivity of CrO2-4 in molten (Li/K)2CO3 is calculated. The corrosion rates are investigated by means of increasing the concentration of CrO2-4 in the melts. Under an air atmosphere, the corrosion rate is slower in molten (Li/K)2CO3 than in molten (Li/Na/K)2CO3 and Cr2O3 corrodes more easily in molten (Li/K)2CO3 than Cr. With an atmosphere of CO2 = 1 atm, there is no increase in the CrO2-4 concentration in the solution phase during a period of 5 h.
- Molten carbonates
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering