Chemical looping with oxygen uncoupling (CLOU) and chemical looping air separation (CLAS) are novel and potentially promising processes for the combustion of solid fuels (e.g. biomass) for power generation with inherent CO₂ capture. Redox-experiments at 850–950 °C confirmed that copper manganese spinel oxides are promising oxygen carriers for these processes, as they combine a relatively high O₂ release capacity and fast O₂ release kinetics. Furthermore, this work presents a novel method to calculate the O₂ partial pressure equilibrium and the heat of O₂ release from observed rates of reaction. To demonstrate this method, oxygen carriers were prepared via mechanical mixing and co-precipitation with varying molar Cu:Mn ratios and synthesis conditions, thereby tuning material properties and the pore structure. The precursors and calcined materials were characterised, and the crystalline phases were determined using X-ray diffraction. The insights from the post cycling analysis of the oxygen carriers and the experimentally obtained O₂ release capacities were combined to elucidate the redox-reactions relevant for the two processes. It was found that the presence of a higher partial pressure of O₂ during the O₂ release results in the formation of different (perovskite-like) phases than those occurring during the decomposition in an O₂-free environment. The oxygen carriers demonstrated excellent stability at CLOU and CLAS process conditions during extended redox cycling (100 cycles in a thermo-gravimetric analyser and 50 cycles in a fluidised bed reactor), showing no significant loss of reactivity or O₂ release capacity and a high resistance towards attrition and agglomeration. The degree of degradation after 100 cycles was in the order: temperature swing (CLAS) < O₂ partial pressure swing (CLOU) < reduction with CH₄ (chemical looping combustion).

具有氧气解偶联（CLOU）的化学循环和空气分离的化学循环（CLAS）是新颖且潜在的有前途的过程，用于燃烧固体燃料（例如生物质）以产生固有的CO ₂捕集发电。850-950°C的氧化还原实验证实，铜锰尖晶石氧化物是这些工艺的有希望的氧载体，因为它们结合了较高的O ₂释放能力和快速的O ₂释放动力学。此外，这项工作提出了一种从观察到的反应速率计算O ₂分压平衡和O ₂释放热量的新颖方法。为了证明这种方法，通过通过改变Cu：Mn摩尔比和合成条件进行机械混合和共沉淀，从而调节材料性能和孔结构。表征前体和煅烧材料，并使用X射线衍射测定结晶相。结合了氧载体的循环后分析和实验获得的O ₂释放能力，从而阐明了与这两个过程相关的氧化还原反应。发现在O ₂释放期间存在较高的O ₂分压会导致形成不同的（钙钛矿状）相，而不是在O _2中分解时形成相。无环境。氧载体在延长的氧化还原循环（在热重分析仪中为100个循环，在流化床反应器中为50个循环）期间，在CLOU和CLAS工艺条件下表现出出色的稳定性，显示出没有明显的反应活性或O ₂释放能力损失，并且电阻高减员和集聚。100个循环后的降解程度依次为：温度波动（CLAS）<O ₂分压波动（CLOU）<CH _4的降低（化学循环燃烧）。