Chemical looping combustion (CLC) is a technology allowing CO₂ capture at low cost. The development of durable oxygen carrier materials is a key factor for the scale-up of CLC. Once a promising oxygen carrier has been identified, dedicated studies into the effects of reaction conditions on the durability of these kinds of materials are required in order to improve their reliability before use at industrial scale. This method requires several long-term tests in CLC units, each one of them to fixed conditions, which is time consuming and expensive. In this work, a low-effort method using thermogravimetric analysis was developed and validated against a high-effort method requiring the use of an oxygen carrier material for hundreds of hours in a CLC unit. The reaction pathways and variation in physico-chemical properties of a material with 14 wt% CuO impregnated on γ-Al₂O₃ during the course of 300 redox cycles were evaluated as a function of reaction temperature, variation in oxygen carrier conversion (ΔX_s) and degree of oxidation/reduction in every redox cycle. As a result, preferred conditions to be used in a CLC unit were identified. In general, reactivity and mechanical integrity were not affected when the reaction temperature was 800 °C. However, a temperature of 900 °C was found to be potentially suitable when the material was highly reduced in each redox cycle and ΔX_s was low. The use of this method for promising oxygen carriers can boost the identification of long lasting materials for the scale-up of chemical looping processes.

化学循环燃烧 (CLC) 是一种允许 CO ₂以低成本捕获。开发耐用的载氧体材料是 CLC 规模化的关键因素。一旦确定了有前途的氧载体，就需要专门研究反应条件对这类材料耐久性的影响，以提高其在工业规模使用前的可靠性。这种方法需要在 CLC 装置中进行多次长期测试，每次测试都在固定条件下进行，既费时又费钱。在这项工作中，开发了一种使用热重分析的省力方法，并针对需要在 CLC 装置中使用氧载体材料数百小时的高省力方法进行了验证。γ-Al ₂ O浸渍 14 wt% CuO 材料的反应途径和理化性质变化在 300 次氧化还原循环过程中，根据反应温度、氧载体转化率 (Δ X _s ) 的变化和每个氧化还原循环中的氧化/还原程度，对图₃进行了评估。结果，确定了在 CLC 单元中使用的首选条件。一般来说，当反应温度为 800 °C 时，反应性和机械完整性不受影响。然而，当材料在每个氧化还原循环中高度还原且 Δ X _s较低时，发现 900 °C 的温度可能是合适的。将这种方法用于有前景的氧载体可以促进对用于扩大化学循环过程的长效材料的识别。