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.

中文翻译：

---

CeO2-Fe2O3载氧体还原化学环流蒸汽甲烷的还原步骤的动力学研究

研究了化学回路蒸汽甲烷重整的还原阶段，以确定CeO ₂ -Fe ₂ O ₃混合氧化物的还原反应动力学。CeO ₂，Fe ₂ O ₃和CeO ₂ -Fe ₂ O ₃通过化学沉淀法制备了不同摩尔比的混合氧化物。表征测试表明，Fe含量较高的样品的Brunauer-Emmett-Teller表面积最低。在氢气温度编程的还原测量过程中，还原峰下的最大面积也与铁含量最高的样品有关。相边界控制模型很好地代表了铁含量较低的氧载体的还原。