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CO2-SR Cyclic Technology: CO2 Storage and in situ Regeneration with CH4 over a new dual function NiBa unsupported catalyst Molina-Ramírez, Sergio Cortés-Reyes, Marina Herrera-Delgado, María Concepción Larrubia-Vargas, María Ángeles Alemany-Arrebola, Luis José Catalizadores A Ni-Ba unsupported catalyst has been developed to be used as a dual function material (DFM) for a new CO2 storage and in-situ regeneration (CO2-SR technology), consisting in a CO2 storage step followed by a CH4 regeneration phase, working in alternating, cyclic and isothermal regime. The heterometallic mixed-oxide catalyst-NiO.BaO- used in this technology was prepared by an ultrasonic assisted coprecipitation using 1:1 atomic ratio (Ni:Ba) and colloidal silica as an agent promoting surface area and improving mechanical properties. The solid obtained maintains the fcc-structure at higher temperatures, demonstrates high reducibility as a bulky catalyst and presents a connected and balanced strong basic sites and CH4 activation centres. It showed a CO2-storage net capacity of 0.232 mmolCO2g−1 and a CO2 and CH4 removal rate of 13.97 % and 11.04 % respectively, with a remarkable selectivity to hydrogen as an enriched-synthesis gas (H2+CO) stream at 600°C. 2025-01-20T13:08:18Z 2025-01-20T13:08:18Z 2020-06 journal article S. Molina-Ramírez, M. Cortés-Reyes, C. Herrera, M.A. Larrubia, L.J. Alemany, CO2-SR Cyclic Technology: CO2 Storage and in situ Regeneration with CH4 over a new dual function NiBa unsupported catalyst, Journal of CO2 Utilization, Volume 40, 2020, 101201, ISSN 2212-9820, https://doi.org/10.1016/j.jcou.2020.101201. (https://www.sciencedirect.com/science/article/pii/S2212982020302900) https://hdl.handle.net/10630/36580 10.1016/j.jcou.2020.101201 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier