Thermochemistry of the reaction between SrCO3 and SrCeO3, represented as SrCO3(s) + SrCeO3(s) = Sr2CeO4(s) + CO2(g), was studied over the temperature range 1035 1135 K. The equilibrium pressure of CO2(g) over the ternary phase mixture of SrCO3(s), SrCeO3(s) and Sr2CeO4(s) was measured at various temperatures by a tensimetric apparatus. The temperature dependence of the measured equilibrium CO2(g) pressure could be represented as ln pCO2 (Pa)(+-0.04) = -24742(+-550) / T + 28.43(+-0.55) (1035 <= T (K) <= 1115) Simultaneous thermogravimetric (TG)/differential thermal analysis (DTA) experiments were carried out for reaction between SrCO3(s) and CeO2(s) in CO2 atmosphere. The results were used to derive the thermodynamic properties of Sr2CeO4(s).
Compounds
#
Formula
Name
1
CeO4Sr2
cerium strontium oxide CeSr2O4
2
CeO3Sr
strontium cerate (IV)
3
CO2
carbon dioxide
4
CO3Sr
strontium carbonate
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
4
Triple point temperature, K ; Crystal 2
Crystal 2
Crystal 1
Gas
DTA
1
RXND
4
1
2
3
Equilibrium constant in terms of partial pressure, kPa^n