Chemical looping partial oxidation of methane (CLPOM) coupled with carbon dioxide splitting process was proposed in this work to achieve high H₂/CO ratio syngas and CO production simultaneously. Manganese ferrite (MnFe₂O₄) oxygen carrier with a spinel structure was prepared by using a co-precipitation phase inversion method for this methane-carbon dioxide reaction system. The reaction performance of oxygen carrier was investigated in fixed bed reactor combined with the analytical methods of XRD, TPR, H₂-TG and XPS. The results revel that spinel structure MnFe₂O₄was successfully prepared and Fe is the main active spices to release lattice oxygen. TG analysis confirms that 43.3% of lattice oxygen can release from MnFe₂O₄ in H₂ atmosphere with highest release rate 0.4%/min at 721 °C. The maximum conversion of CH₄ and CO₂ are 63% and 99% achieved in CLPOM coupled with CO₂ splitting process and temperature makes a positive effect on the reaction process. Moreover, the reaction stability of MnFe₂O₄ oxygen carrier are verified in 10 cycles reaction of CLPOM coupled with CO₂ splitting with the reaction path MnFe₂O₄ $\to$(FeO)_0.798-(MnO)_0·202/FeO $\to$MnFe₂O₄. Moreover, The MnFe₂O₄ oxygen carriers with different reduction stages were analyzed by XPS to reveal lattice oxygen migration mechanism, which indicates that the bulk lattice oxygen of oxygen carrier gradually dissociated and migrated to the outer surface in reaction process where reacts directly with methane or converts to oxygen adsorption OII. The valence of Mn has not changed in the whole reaction process, whereas, Mn species forms the synergistic effect with Fe to improve the conversion of CH₄ and CO₂, promoting the oxidization of Fe²⁺ to Fe³⁺ in CO₂ atmosphere. MnFe₂O₄ oxygen carrier is a promising candidate for the CLPOM coupled with CO₂ splitting process.

这项工作提出了甲烷的化学循环部分氧化（CLPOM）结合二氧化碳的分解过程，以同时实现高H ₂ / CO比合成气和CO的生产。采用共沉淀相转化法制备了该甲烷-二氧化碳反应体系的尖晶石结构锰铁氧体（MnFe ₂ O ₄）氧载体。结合XRD，TPR，H ₂ -TG和XPS的分析方法，研究了固定床反应器中氧气载体的反应性能。结果表明尖晶石结构MnFe ₂ O ₄Fe是成功制备的，Fe是释放晶格氧的主要活性香料。TG分析证实，在H ₂气氛中，MnFe ₂ O ₄可以释放出43.3％的晶格氧，在721°C下的最高释放速率为0.4％/ min。在CLPOM中，结合CO ₂分解过程，CH ₄和CO ₂的最大转化率分别达到63％和99％，温度对反应过程产生积极影响。此外，通过CLPOM的10个循环反应与通过反应路径MnFe ₂ O ₄分解的CO ₂耦合，证实了MnFe ₂ O ₄氧载体的反应稳定性。 $\to$（FeO）_0.798-（MnO）_0·202 / FeO$\to$MnFe ₂ O ₄。此外，通过XPS分析了不同还原阶段的MnFe ₂ O ₄载氧体，揭示了晶格氧的迁移机理，表明在与甲烷直接反应的反应过程中，氧载体的整体晶格氧逐渐解离并迁移至外表面。或转化为氧气吸附的OII。Mn的化合价在整个反应过程中没有改变，反之，锰物种形成与铁的协同效应，以改善CH的转化₄和CO ₂，促进铁的氧化²⁺与Fe ³⁺在CO ₂气氛中。锰铁₂O ₄氧载体是结合C ₂裂解工艺的CLPOM的有前途的候选物。