The Integrated Carbon Capture and Conversion (ICCC) system enables the coupling of the Calcium Looping (CaL) and Reverse Water Gas Shift (RWGS) processe to mitigate CO₂ emissions while simultaneously converting it into a valuable fuel. Dual-functional materials (DFMs), which combine adsorbent and catalyst in one-body material, are appropriately designed as an energy-efficient strategy. In the present paper, the 10Fe/45CaO55Ca₁₂Al₁₄O₃₃ DFM is proposed for CaL-RWGS process in the temperature range 500–700 °C and at ambient pressure. The DFM was prepared by wet impregnation of CaO-Ca₁₂Al₁₄O₃₃ sorbent with aqueous solution of ferrous acetate and characterized by XRD, FTIR, N₂ physisorption, SEM, TG, H₂-TPR, CO₂-TPD, and H₂-TPD. In-situ carbonation of 10Fe/45CaO55Ca₁₂Al₁₄O₃₃ provided a CO₂ adsorption capacity of 7.2 mmol g_DFM⁻¹, whereas in-situ hydrogenation achieved 7.1 mmol g_DFM⁻¹ CO yield, 98% CO₂ conversion, and 100% CO selectivity at 700 °C. At lower RWGS temperatures CO yield values were lower, ranging from 4.4 and 6.8 mmol g_DFM⁻¹, but maintaining a high CO₂ conversion of 86–96%. Meanwhile, the parasitic methanation reaction was effectively suppressed. The results are related to the moderate surface basicity, enhanced specific surface area and tuneable redox behaviour of iron-based catalysts supported on CaO-Ca₁₂Al₁₄O₃₃ sorbent. After 30 CaL-RWGS cycles the 10Fe/45CaO55Ca₁₂Al₁₄O₃₃ showed great stability but also good catalytic performance for RWGS owing to the multiple redox properties of Fe⁰, Fe₃O₄ and Ca₂Fe₂O₅. © 2026 Elsevier Ltd.

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