Catalysis Letters, Vol.110, No.1-2, 155-160, 2006
Formation of brownmillerite type calcium ferrite (Ca2Fe2O5) and catalytic properties in propylene combustion
Several types of calcium ferrite base catalysts (Ca/Fe = 0.33-3) for propylene (C3H6) combustion were prepared. Calcium ferrite catalyst with brownmillerite crystal structure provided catalytic activity for C3H6 combustion in the temperature range of 250-450 degrees C. The brownmillerite phase (Ca2Fe2O5) was responsible for the formation of oxygen adspecies (O-2(-)) in the surface layer below 450 degrees C.