Co-doped Fe2O3 of different orders of magnitude were prepared as oxygen carriers

the structures of which were characterized with adsorption-desorption (BET) and transmission electron microscope (TEM). Experiments under different temperatures were performed to investigate the reaction between Co-doped Fe2O3 and CO to understand the chemical looping combustion characteristics of these prepared oxygen carriers. The higher the doping amount

the higher the reduction conversion at the same temperature. However

with the same doping amount

increase of temperature led to increase of reduction degree

shortening the time of complete conversion of oxygen carrier. Further analysis of chemical kinetics and reaction dynamics based on TGA curve showed that the Jander equation model was suitable for the reduction of Co-doped Fe2O3 at 344.7-391.0℃ and 414.7-472.5℃

and the Valensi equation model was suitable for the reduction at 607.6-681.5℃

according to which the kinetic parameters including activation energy and pre-exponential factor were also calculated. The research results could provide theoretical guidance for further application of CLC technology.