The present work is related to the upscaling of calcium manganite–based oxygen‐carrier materials, which have a perovskite structure, both with respect to the use of inexpensive raw materials, i.e., instead of pure chemicals, and the upscaling of production to multitonne batches. Results are presented from the two different stages of material development, i.e., raw material selection and upscaling. The evaluation involves both operation in chemical‐looping combustor units of 300 W and 10 kW, and material characterization. In the latter unit, the gas velocities in the riser and in the grid‐jet zone of the gas distributor come close to gas velocities of industrial‐scale units and, therefore, this unit is also used to assess particle lifetime. Results from the various chemical‐looping combustion units and oxygen‐carrier materials produced from various raw materials of both high and low purity show that very high degrees of fuel conversion can be reached while achieving very high oxygen‐carrier lifetimes. The composition of the oxygen‐carrier materials seems robust and flexible with respect to the precursors used in its manufacturing.

中文翻译：

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具有钙钛矿结构的钙锰矿基甲烷化学循环燃烧的氧载体的开发

目前的工作与使用钙钛矿结构的钙锰矿基载氧材料的升级有关，既涉及廉价原材料（即代替纯化学品）的使用，又涉及到多吨批次的生产升级。 。结果来自材料开发的两个不同阶段，即原材料选择和扩大规模。评估涉及300 W和10 kW的化学循环燃烧器单元的运行以及材料特性。在后一单元中，立管和气体分配器的网格喷射区中的气体速度接近于工业规模单元的气体速度，因此，该单元还用于评估颗粒寿命。各种化学循环燃烧装置和由高纯度和低纯度的各种原料生产的载氧材料的结果表明，在达到很高的载氧体寿命的同时，可以达到很高的燃料转化率。相对于其制造中使用的前体，载氧材料的成分似乎既坚固又灵活。