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Equilibrium solubilities of LiFeO/sub 2/ and (Li,K)/sub 2/CrO/sub 4/ in molten alkali carbonates at 650/sup 0/C. [Lithium and potassium chromates]

Technical Report ·
DOI:https://doi.org/10.2172/5279867· OSTI ID:5279867

The equilibrium solubilities of LiFeO/sub 2/ and (Li,K)/sub 2/CrO/sub 4/ in 62% Li/sub 2/CO/sub 3/-38% K/sub 2/CO/sub 3/ were quantitatively measured at 650/sup 0/C under simulated oxidizing gas environments of molten carbonate fuel cells. Both materials in the carbonate mixture were dissolved according to a physical dissolution process, where the solubilities of LiFeO/sub 2/ and (Li,K)/sub 2/CrO/sub 4/ are independent of partial pressures of CO/sub 2/ and O/sub 2/. Equilibrium solubilities of LiFeO/sub 2/ and (Li,K)/sub 2/CrO/sub 4/ in the carbonate mixture were determined to be 77 wppm of iron and 13.7 wt % of chromium, respectively. 14 refs., 7 figs.

Research Organization:
Oak Ridge National Lab., TN (USA)
DOE Contract Number:
AC05-84OR21400
OSTI ID:
5279867
Report Number(s):
ORNL/TM-10142; ON: DE86015905
Country of Publication:
United States
Language:
English