Chemical Engineering & Technology, Vol.43, No.3, 540-552, 2020
Kinetic Study of the Reduction Step for Chemical Looping Steam Methane Reforming by CeO2-Fe2O3 Oxygen Carriers
The reduction stage of chemical looping steam methane reforming was investigated to determine the kinetics of the reduction reaction for CeO2-Fe2O3 mixed oxides. CeO2, Fe2O3, and CeO2-Fe2O3 mixed oxides with different molar ratios were prepared by chemical precipitation. Characterization tests indicated the lowest Brunauer-Emmett-Teller surface area for samples with higher Fe content. The largest area under reduction peaks during hydrogen temperature-programmed reduction measurements was also related to the samples with highest Fe content. Reduction of the oxygen carriers with lower Fe content was well represented by a phase boundary-controlled model.