Development of Membrane Reactor Coupling Hydrogen and Syngas Production.

Simultaneous syngas and pure hydrogen production through partial oxidation of methane and water splitting, respectively, were demonstrated by using mixed ionic-electronic conductors. Tubular ceramic membranes prepared from LaSrFeO perovskite were successfully utilized in a 10 M lab scale reactor by applying a radial arrangement. The supply of methane to the middle area of the reaction zone was shown to provide a uniform distribution of the chemical load along the tubes' length.

Impact of oxygen content on preferred localization of p- and n-type carriers in LaSrFeMnO.

The oxygen content in LaSrFeMnO, measured by coulometric titration in a wide range of oxygen partial pressure at various temperatures, was used for defect chemistry analysis. The obtained data were well approximated by a model assuming defect formation in LaSrFeMnO Fe and Mn oxidation reactions and charge disproportionation on Fe and Mn ions. The partial molar enthalpy and entropy of oxygen in LaSrFeMnO obtained by statistical thermodynamic calculations were found to be in satisfactory agreement with those obtained using the Gibbs-Helmholtz equations, thus further confirming the adequacy of the model.

Impact of A-Site Cation Deficiency on Charge Transport in LaSrFeO.

The electrical conductivity of LaSrFeO, investigated as a function of the nominal cation deficiency in the A-sublattice, , varying from 0 to 0.02, has demonstrated a nonlinear dependence. An increase in the value from 0 to 0.

Non-uniform electron conduction in weakly ordered SrFeMoO.

The electrical conductivity of SrFe1-xMoxO3-δ (0.07, 0.15, 0.