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Mater Sci Nanotechnol 2017 | Volume 1 Issue 2
allied
academies
Nanomaterials and Nanochemistry
November 29-30, 2017 | Atlanta, USA
International Conference on
T
he thermodynamics of nano-ceria-based metal oxides
have been studied in the context of solar thermochemical
redox cycles for splitting H
2
O and CO
2
at elevated pressure.
Because of the resistance to high temperature of nano-ceria-
based metal oxides MxCe1−xO
2
, such systems are suitable
for resolving stability problems frequently encountered
with high-temperature operations. Catalytic systems for
CO
2
/H
2
O conversion, with Gd, Y, Sm, Ca, Sr, nano-particle
ceria-based perovskite, were synthesized, and tested
at close to industrial conditions at the Royal Institute of
Technology in Stockholm. Oxygen nonstoichiometric was
investigated at high temperatures, pressure for a redox
system. Subsequently, relevant thermodynamic parameters
were computed and equilibrium H
2
and CO concentrations
determined as a function of reduction conditions (T, PO
2
)
and ensuing oxidation temperature. At 8 bar and above
1073 K, the degree of reduction is positive for pure nano-
ceria particle. As a result, at a given reduction temperature
and elevated pressure, more H
2
and CO is generated at
equilibrium state.
e:
bahram.saadatfar@energy.kth.seThermodynamic analysis of nano particle ceria-based oxides at elevated pressure for solar thermochemical
redox cycles fuel production
Bahram Sadaftar
KTH Royal Institute of Technology, Sweden