THE REACTION OF LIQUID-SODIUM WITH THE OXIDES CEO2 AND CE2O3 AND THE DETERMINATION OF THE FREE-ENERGY OF FORMATION OF NACEO2 AND NA2CEO3

Authors
BARKER MG FRANKHAM SA GADD PG
Citation
Mg. Barker et al., THE REACTION OF LIQUID-SODIUM WITH THE OXIDES CEO2 AND CE2O3 AND THE DETERMINATION OF THE FREE-ENERGY OF FORMATION OF NACEO2 AND NA2CEO3, Journal of nuclear materials, 218(2), 1995, pp. 256-260
Citations number
12
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
Journal title
Journal of nuclear materials → ACNP
ISSN journal
00223115
Volume
218
Issue
2
Year of publication
1995
Pages
256 - 260
Database
ISI
SICI code
0022-3115(1995)218:2<256:TROLWT>2.0.ZU;2-9
Abstract
The sodium-cerium ternary oxides NaCeO2 and Na2CeO3 have been shown to be stable in liquid sodium. Their free energies of formation have bee n measured by emf methods and follow the equations Delta G(f) degrees( NaCeO2) = -1121687 + 219.71T Jmol(-1), Delta G(f) degrees(Na2CeO3) = - 1551941 + 341.64T Jmol(-1). At 873 K Na2CeO3 requires high oxygen leve ls in the sodium for it to be formed but NaCeO2 will form from Ce2O3 a nd sodium at reactor operating oxygen levels. The oxide CeO2 has been shown to react with liquid sodium at 625 K forming the ternary oxide N aCeO2 and the heat of reaction has been measured.