Chemical looping gasification (CLG) of biomass is an innovative biomass gasification technology, where oxygen carrier (OC) has the effects of oxygen supply, heat transfer and catalyst for syngas production. In order to integrate the synergistic effect between Fe and Cu oxides, a novel combined OC containing Fe₂O₃ and CuO was produced for biomass gasification and investigated in a batch fluidized bed reactor in this work. At first, an OC with 50 wt.% Fe₂O₃ and 10 wt.% CuO (Fe50Cu10) was selected as the representative OC to evaluate the superiority of combined OC. The mono-metallic OC of CuO is unsuitable as oxygen carrier in the CLG of biomass due to its too low syngas yield, although CuO can greatly accelerate biomass gasification process. In addition, combined Fe-Cu oxides OC is also superior to mono-metallic OC of Fe₂O₃ at enhancing carbon conversion efficiency on the premise that syngas yield tended to be close. Then the blending ratio of Fe/Cu was optimized and Fe50Cu10 had been proven to be the optimal combined Fe-Cu oxides OC in CLG. Next, the influences of the factors including gasification temperature, steam mole fraction and O/C ratio on the performance of Fe50Cu10 were investigated. 900 °C is the best temperature for gasification and higher team mole fraction gave rise to higher carbon conversion efficiency and syngas yield, while O/C ratio was somewhat different. The optimal O/C ratio was deemed to be 0.78. Besides, 10 redox cycles were conducted to investigate the stability of combined OC reactivity. The combined OC after 3 cycles performed worst reactivity, while better performance was demonstrated after 7–10 cycles. Based on the analysis of SEM-EDX, it was found that sintering caused by Cu atomic was the main cause of the reactivity decline. In addition, it was inferred that the distribution of Cu atomic in the combined OC was more uniform with the cycle number.

生物质的化学循环气化（CLG）是一种创新的生物质气化技术，其中的氧气载体（OC）具有氧气供应，传热和合成气生产催化剂的作用。为了整合Fe和Cu氧化物之间的协同作用，制备了一种新型的含Fe ₂ O ₃和CuO的混合OC用于生物质气化，并在间歇流化床反应器中进行了研究。首先，使用具有50 wt。％Fe ₂ O ₃的OC并选择10 wt。％CuO（Fe50Cu10）作为代表性OC，以评估组合OC的优越性。尽管CuO可以极大地加速生物质的气化过程，但由于CuO的单金属OC合成气产率过低，因此不适合作为生物质CLG中的氧载体。此外，Fe-Cu复合氧化物OC也优于Fe ₂ O _3的单金属OC。在合成气收率趋于接近的前提下提高碳转化效率。然后优化了Fe / Cu的配合比，并证明了Fe50Cu10是CLG中最佳的Fe-Cu复合氧化物OC。接下来，研究了气化温度，蒸汽摩尔分数和O / C比等因素对Fe50Cu10性能的影响。900°C是气化的最佳温度，较高的团队摩尔分数导致较高的碳转化效率和合成气收率，而O / C比则有所不同。最佳O / C比被认为是0.78。此外，进行了10次氧化还原循环以研究组合OC反应性的稳定性。3个循环后的混合OC表现出最差的反应性，而7-10个循环后表现出更好的性能。根据SEM-EDX的分析，发现由Cu原子引起的烧结是反应性下降的主要原因。另外，可以推断出，在组合的OC中，Cu原子的分布与循环数更加均匀。