Abstract Chemical looping combustion (CLC) is a low-cost CO 2 capture technology with a low energy penalty. Bio-energy with CO 2 capture and storage (BECCS) opens up the possibility for negative CO 2 emissions involving the removal of CO 2 already emitted into the atmosphere. The oxygen needed for combustion in CLC processes is supplied by a solid oxygen carrier circulating between the fuel reactor and the air reactor. In this work, the combustion of different types of biomass, such as pine sawdust, olive stones and almond shells, was studied in a continuous 1.5 kW th CLC unit. A mixed Cu-Mn oxide was used as the oxygen carrier. This material releases gaseous oxygen when reduced, resulting in Chemical looping combustion with oxygen uncoupling (CLOU). The released oxygen reacts with both the volatiles and char generated inside the fuel reactor when biomass is fed into it. The oxygen carrier is reoxidized in air inside the air reactor. High CO 2 capture and 100% combustion efficiencies were achieved with this Cu-Mn oxygen carrier. The oxygen concentration inside the air reactor did not affect CO 2 capture efficiency under the studied conditions.

中文翻译：

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生物质的化学循环燃烧：铜锰混合氧化物的 CLOU 实验

摘要 化学循环燃烧 (CLC) 是一种低成本的 CO 2 捕获技术，具有低能量损失。具有 CO 2 捕获和储存 (BECCS) 的生物能源开辟了负 CO 2 排放的可能性，包括去除已经排放到大气中的 CO 2。CLC 过程中燃烧所需的氧气由在燃料反应器和空气反应器之间循环的固体氧载体提供。在这项工作中，在连续 1.5 kW th CLC 装置中研究了不同类型的生物质的燃烧，例如松木屑、橄榄核和杏仁壳。混合Cu-Mn氧化物用作氧载体。这种材料在还原时会释放气态氧，导致化学循环燃烧和氧解偶联 (CLOU)。当生物质进入燃料反应器时，释放的氧气会与燃料反应器内产生的挥发物和焦炭发生反应。氧载体在空气反应器内的空气中被再氧化。使用这种 Cu-Mn 氧载体实现了高 CO 2 捕获和 100% 的燃烧效率。在研究条件下，空气反应器内的氧气浓度不影响CO 2 捕获效率。