Sulphur chemical looping combustion (CLC) produces concentrated SO₂ at low reaction temperatures. Here, the reaction mechanism of iron-based oxygen carriers (OCs) with sulphur and the cyclic reaction performance of the OCs were studied. The OCs were prepared on three inert supports (ZrO₂, MgAl₂O₄, and Al₂O₃) with seven loading ratios using sol-gel method. The effects of the inert support, sulphur gasification temperature, OC reduction temperature, and N₂ purge gas flow rate on the reaction between sulphur and OCs were investigated. For both Fe5Al5 and Fe5MgAl5 reductions, the FeO combined with Al₂O₃ to form FeAl₂O₄ spinel instead of being reduced further. Nevertheless, no spinel was formed in Fe₂O₃/ZrO₂ (Fe5Zr5) reduction, but the over-reduction of FeO to Fe occurred. The reaction conditions were then optimized. The SO₂ yields in the FR reached 87.68–91.61 %, and the FeS and FeS₂ formed in the FR released SO₂ in the AR. The three oxygen carriers (Fe5Al5, Fe5Zr5, and Fe5MgAl5) exhibited stable reactivity for ten cycles. Overall, Fe5Al5 was the optimal oxygen carrier for sulphur CLC, with respect to oxygen delivery, SO₂ concentrations in the FR, and stability in redox cyclic reactions.

硫化学链燃烧（CLC）在低反应温度下产生浓SO _{2 。}在此，研究了铁基氧载体（OCs）与硫的反应机理以及OCs的循环反应性能。使用溶胶-凝胶法在三种惰性载体（ZrO ₂、MgAl ₂ O ₄和Al ₂ O ₃ ）上以七种负载比制备OC 。研究了惰性载体、硫气化温度、OC还原温度和N ₂吹扫气流量对硫与OCs反应的影响。对于Fe5Al5和Fe5MgAl5还原，FeO与Al ₂ O ₃结合形成FeAl ₂ O ₄尖晶石，而不是进一步还原。_{然而，在Fe 2} O ₃ /ZrO ₂ (Fe5Zr5)还原中没有形成尖晶石，但发生了FeO向Fe的过度还原。然后优化反应条件。FR中SO ₂产率达到87.68-91.61%， FR中形成的FeS和FeS ₂在AR中释放SO _{2 。}三种氧载体（Fe5Al5、Fe5Zr5 和 Fe5MgAl5）在十个循环中表现出稳定的反应性。总体而言，就氧气输送、FR 中的SO _{2浓度以及氧化还原循环反应的稳定性而言，Fe5Al5 是硫 CLC 的最佳氧载体。}