The reaction performance of red mud, which generally contains high amount of Na, as an oxygen carrier for Chemical Looping Combustion (CLC) was evaluated using methane and biomass char as fuel respectively. Effects of reaction temperature and cycles on fuel conversion, particle agglomeration and Na distribution were investigated. Fluidized Bed Thermogravimetric test suggested a stable reactivity during successive redox cycles of the red mud with an oxygen transport capacity of 1.65%. The red mud demonstrates a low reactivity with methane, and a serious agglomeration was found during the fluidized bed experiments with methane due to the further reduction of Fe₂O₃ to its low state of FeO. It has enough reactivity to oxidize the char gasification productions, thus accelerating the char conversion. The average values of the instantaneous rate increase by 2.82 times at 1143 K, 3.88 times at 1163 K, 3.58 times at 1183 K and 2.0 times at 1203 K in comparison with inert gasification process. Almost no agglomerates formation was found for the CLC investigation using biomass char as fuel. Irrespective of the CLC process of methane or the biomass char, Na exists in a stable phase of NaAlSiO₄ with a high melting point and has no influence on particle agglomeration.

分别使用甲烷和生物质炭作为燃料，评估了赤泥作为化学循环燃烧 (CLC) 氧载体的反应性能，赤泥通常含有大量的 Na。研究了反应温度和循环对燃料转化、颗粒团聚和 Na 分布的影响。流化床热重测试表明在红泥的连续氧化还原循环期间具有稳定的反应性，氧传输能力为 1.65%。赤泥表现出与甲烷的低反应性，并且在甲烷的流化床实验中发现由于Fe ₂ O ₃的进一步还原而导致严重的团聚到其低 FeO 状态。它具有足够的反应活性来氧化焦炭气化产物，从而加速焦炭转化。与惰性气化工艺相比，瞬时速率的平均值在1143 K时增加了2.82倍，在1163 K时增加了3.88倍，在1183 K时增加了3.58倍，在1203 K时增加了2.0倍。对于使用生物质炭作为燃料的 CLC 研究，几乎没有发现团块形成。无论是甲烷还是生物质炭的CLC过程，Na都存在于高熔点的NaAlSiO ₄稳定相中，对颗粒团聚没有影响。