(156f) Study on the Performance of Fe2O3-MgO/Al2O3 As the Oxygen Carrier in Chemical-Looping Hydrogen Generation

Fe₂O₃-MgO/Al₂O₃, prepared by the impregnation method, was characterized by BET, TPR, XRD, Raman and XPS methods. It was shown that Mg²⁺ went into Fe₂O₃ crystal lattice and solid solution was formed in Fe₂O₃-MgO/Al₂O₃. As a result, oxygen content of Fe₂O₃-MgO/Al₂O₃ increased and the grain size of Fe₂O₃ decreased. Both were in favour of oxidation-reduction reactions. Fe₂O₃-MgO/Al₂O₃ was used as the oxygen carrier in Chemical-Looping Hydrogen Generation, which is an oxidation-reduction reaction. The evaluation performances indicated that the oxygen carrier was so active that methane was totally oxidized at 850^oC and atmosphere, and the hydrogen yield was high correspondingly. Combination of characteristic results and evaluation results, it was revealed that solid solution of MgO and Fe₂O₃ enhanced the oxygen content and dispersion of Fe₂O₃, which is beneficial to the methane conversion and hydrogen yield in chemical-looping hydrogen generation.