Study on the Performance of Fe2O3/MgO/Al2O3 in Chemical- Looping Hydrogen Generation

Fe₂O₃/Al₂O₃, prepared by the impregnation method, was used as the oxygen carrier in Chemical-Looping Hydrogen Generation. The evaluation performance indicated that the oxygen carrier was active that methane was totally oxidized, and the hydrogen yield was notably high at first. However, carbon deposition was high when reacted with methane and it affected the purity of H₂. The addition of MgO to Fe₂O₃/ Al₂O₃ as a promoter was tested and characterized by BET, SEM, TPR, XRD and XPS methods. Fe₂O₃- MgO/ LaNiO₃ was evaluated under the same evaluation conditions as Fe₂O₃/Al₂O₃. The evaluation performance indicated that Fe₂O₃- MgO/ LaNiO₃ remained low carbon deposition even after 100 cycles. TPR and XPS characterization illustrated that MgO enhanced the dispersity of Fe₂O₃.