Fe₂O₃ is currently the most proper active metal oxide for chemical looping hydrogen generation (CLHG). However, supports are necessary to improve the reactivity and redox stability. CeO₂ can enhance the oxygen mobility, leading to high redox reactivity and carbon deposition resistance, which can be an excellent alternative support for oxygen carriers. In this paper, Fe₂O₃/CeO₂ oxygen carriers prepared by the co-precipitation method with different Fe₂O₃ loadings were investigated on a batch fluidized bed regarding the hydrogen yield and purity, redox reactivity and stability in CLHG with CO as fuel. The results showed that Fe6Ce4 is the best given comprehensive performance with no CO or CO₂ observed in the obtained hydrogen (detection limit 0.01% in volume). The oxygen mobility property for the reducible support CeO₂ and the physical contact between un-integrated Fe₂O₃ and CeO₂ could improve the reduction of Fe₂O₃. In addition, the formation of the hematite-like solid solution and perovskite-type CeFeO₃ could bring about abundant oxygen vacancies and promote the oxygen mobility, which contributes to the elimination of carbon deposition, counteracts the negative effect of serious sintering and guarantees the reactivity and redox stability of the Fe₂O₃/CeO₂ oxygen carriers. The Fe₂O₃/CeO₂ oxygen carriers were characterized by carbon monoxide temperature-programmed reduction measurement and X-ray diffraction patterns, and Fe6Ce4 was also selected to be characterized by scanning electron microscopy images and energy dispersive X-ray spectrometer analysis.

目前，Fe ₂ O ₃是用于化学环产氢（CLHG）的最合适的活性金属氧化物。但是，需要载体来改善反应性和氧化还原稳定性。CeO ₂可以增强氧的迁移率，从而导致较高的氧化还原反应性和抗碳沉积性，可以成为氧载体的出色替代载体。本文采用共沉淀法制备了Fe ₂ O ₃ / CeO ₂与不同的Fe ₂ O ₃载体。在分批流化床上研究了负载量，其中涉及氢气和纯度，氧化还原反应性以及在以CO为燃料的CLHG中的稳定性。结果表明，Fe6Ce4是最佳综合性能，在所得氢气中未观察到CO或CO ₂（检出限为体积的0.01％）。可还原载体CeO ₂的氧迁移率特性以及未结合的Fe ₂ O ₃和CeO ₂之间的物理接触可以改善Fe ₂ O ₃的还原。另外，形成赤铁矿状固溶体和钙钛矿型CeFeO _3。可以带来大量的氧空位并促进氧的迁移，这有助于消除积碳，抵消了严重烧结的不利影响，并保证了Fe ₂ O ₃ / CeO ₂氧载体的反应性和氧化还原稳定性。通过一氧化碳程序升温还原测量和X射线衍射图对Fe ₂ O ₃ / CeO ₂氧载体进行表征，并通过扫描电子显微镜图像和能量色散X射线谱仪分析对Fe6Ce4进行表征。