Several types of calcium ferrite base catalysts (Ca/Fe = 0.33-3) for propylene (C 3 H 6 ) combustion were prepared. Calcium ferrite catalyst with brownmillerite crystal structure provided catalytic activity for C 3 H 6 combustion in the temperature range of 250-450°C. The brownmillerite phase (Ca 2 Fe 2 O 5 ) was responsible for the formation of oxygen adspecies (O 2 ) ) in the surface layer below 450°C.