Sorption-enhanced chemical looping reforming of ethanol for hydrogen production was investigated using Fe₂O₃ as oxygen carrier and modified CaO-based Al₂O₃ as CO₂ sorbent. Combined Fe₂O₃/CaO-Al₂O₃ multifunctional catalysts were demonstrated and prepared by different methods including sol-gel, mechanical mixing, and impregnation at different Fe contents (5, 10, and 15 wt%). The results showed that the multifunctional catalyst prepared by impregnation method with 5 wt% Fe loading provided the highest H₂ purity of 70% in the pre-breakthrough period which lasted for 60 min at 600 °C. This was attributed to the preserving of Ca₁₂Al₁₄O₃₃ inert support in the structure during the preparation as shown by XRD results, leading to higher surface area as determined by N₂ physisorption and to prevention of particle agglomeration as evidenced by SEM-EDX. Although the H₂ production was inhibited by the presence of Ca₂Fe₂O₅ phase, a stable performance was found for at least 5 repeated cycles both for sorption capacity and oxygen carrier. The ease of decarbonation was also observed with this material as confirmed by DSC-TGA analysis. This highlighted the mutual advantages of Fe in CaO sorption stability and Ca in Fe oxygen carrier stability which could offset their intrinsic weak robustness.

以Fe ₂ O ₃为氧载体，改性CaO基Al ₂ O ₃为CO ₂吸附剂，研究了乙醇对氢的化学吸附重整工艺。通过不同的方法，包括溶胶-凝胶法，机械混合法和在不同的Fe含量（5、10和15 wt％）下浸渍，制备并制备了组合的Fe ₂ O ₃ / CaO-Al ₂ O ₃多功能催化剂。结果表明，浸渍法制备的Fe含量为5 wt％的多官能催化剂提供了最高的H _2。突破前的纯度为70％，在600°C持续60分钟。XRD结果表明，这是由于在制备过程中在结构中保留了Ca ₁₂ Al ₁₄ O ₃₃惰性载体，通过N ₂物理吸附确定了较高的表面积，并通过SEM-EDX证实了防止了颗粒团聚。尽管Ca ₂ Fe ₂ O ₅的存在抑制了H _2的产生在吸附相和氧气载体的至少5个重复循环中，我们发现了稳定的性能。DSC-TGA分析也证实了这种材料的脱碳容易性。这突出了Fe在CaO吸附稳定性和Ca在Fe氧载体稳定性方面的共同优势，可以抵消其固有的弱鲁棒性。