Chemical looping combustion (CLC) for industrial-scale applications is hindered by challenges of inefficient fuel conversion, auto-thermal operation, and complex system operation. To improve the CLC performance under low temperature, operational strategies were optimized in a 3 kW_th CLC plant with the design criterion of a simplified circulation mechanism. The gas conversion efficiency was enhanced by employing internal distributors in a multistage fuel reactor (FR). The CO₂ capture and carbon conversion efficiencies were improved by each of the following: optimizing the FR fluidization flow, utilizing staged fluidization, and optimizing the steam coal (S/C) ratio. The potential of each of the abovementioned operational strategies was evaluated by analyzing the axial distribution of the gas concentration in the FR. The staged fluidization was the most effective method among the three operational strategies. It could increase the particle residence time, FR bed inventory, and cyclone efficiency. The CO₂ capture efficiency increased from 57.8% to 80.3%, the carbon conversion efficiency increased from 81% to 96%, and the OC lifetime was improved from 300 h to 342 h. The OC attrition behaviors were also evaluated under different operational conditions. The FR internals had a limited effect on the OC lifetime; however, increasing the inlet velocity of the cyclone would aggravate the OC abrasion.

效率低下的燃料转换，自动热操作和复杂的系统操作等挑战阻碍了工业规模应用的化学循环燃烧（CLC）。为了改善低温下的CLC性能，操作策略在3千瓦进行了优化_第一个简化的循环机构的设计准则CLC植物。通过在多级燃料反应器（FR）中使用内部分配器，提高了气体转化效率。一氧化碳₂下列各项改进了捕集和碳转化效率：优化FR流化流，利用分段流化以及优化动力煤（S / C）比。通过分析FR中气体浓度的轴向分布，评估了上述每种操作策略的潜力。分阶段流化是三种操作策略中最有效的方法。它可能会增加颗粒停留时间，FR床库存和旋风分离器效率。一氧化碳₂捕集效率从57.8％提高到80.3％，碳转化效率从81％提高到96％，OC寿命从300 h提高到342 h。还评估了在不同操作条件下的OC磨损行为。FR内部对OC寿命的影响有限；但是，增加旋风分离器的入口速度会加剧OC磨损。