The Ca-Cu looping process allows a H₂-rich product gas to be obtained on the basis of the sorption enhanced reforming (SER) concept, while generating a concentrated stream of CO₂ suitable for geological storage or industrial use. Previous works have demonstrated that the Cu/CuO chemical loop provides a feasible alternative for regenerating the CO₂-sorbent required for the SER with potentially low energy penalties. In this work, the CuO reduction/CaCO₃ calcination operation, which is the key stage of the Ca-Cu looping process, is experimentally demonstrated in a fixed-bed reactor at TRL4 using pure methane as fuel gas. The effect of the temperature of the solids bed on the operation is also evaluated. A detailed characterization of both CuO- and CaO-based materials resulting from the experiments has been carried out, revealing only minor changes in their textural properties, which demonstrates their high stability after successive oxidation-carbonation-reduction/calcination cycles.

Ca-Cu循环过程允许在吸附增强重整（SER）概念的基础上获得富含H _2的产物气，同时生成适用于地质存储或工业用途的浓缩CO ₂物流。先前的工作表明，Cu / CuO化学环为再生SER所需的CO ₂吸附剂提供了一种可行的替代方法，且潜在的能量损失较低。在这项工作中，CuO还原/ CaCO ₃煅烧操作是Ca-Cu循环过程的关键阶段，已在TRL4的固定床反应器中使用纯甲烷作为燃料气进行了实验证明。还评估了固体床温度对操作的影响。对实验所得的基于CuO和CaO的材料都进行了详细的表征，发现它们的组织性质只有很小的变化，这表明它们在连续的氧化-碳化-还原/煅烧循环后具有很高的稳定性。