Chemical looping combustion (CLC) offers a novel approach to simultaneous power generation and carbon capture. However, the commercial viability of CLC depends on durable and cost-effective oxygen carriers (OCs). This study assesses the impact of water vapor (WV) on the attrition of red mud OC, crucial for industrial CLC deployment. Findings indicate a significant reduction in the average attrition rate, from 0.06%/h to 0.03%/h, attributed to the limitation of Fe₂O₃ reduction, resulting in reduced volumetric and temperature changes in the presence of WV. A developed volume-based model reveals attrition contributions in the order of chemical > mechanical >> thermal stresses, influencing OC particle surface morphology. Remarkably, the formation of the iron-oxide layer remains unaffected by WV, reducing agents (CO or H₂), or superficial velocities, suggesting scalable iron recovery from attrition with enhanced flexibility in future applications.

中文翻译：

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化学链燃烧中水蒸气对铁基氧载体磨损和元素迁移的影响

化学循环燃烧（CLC）提供了一种同时发电和碳捕获的新方法。然而，CLC 的商业可行性取决于耐用且具有成本效益的氧载体 (OC)。本研究评估了水蒸气 (WV) 对赤泥 OC 磨损的影响，这对于工业 CLC 部署至关重要。研究结果表明，由于 Fe ₂ O ₃还原的限制，平均磨损率显着降低，从 0.06%/h 降至 0.03%/h ，导致 WV 存在下体积和温度变化减少。开发的基于体积的模型揭示了磨损贡献的顺序为化学 > 机械 > 热应力，影响 OC 颗粒表面形态。值得注意的是，氧化铁层的形成不受 WV、还原剂（CO 或 H ₂）或空塔速度的影响，这表明可扩展的铁从磨损中回收，并在未来的应用中具有增强的灵活性。