Artículo
Methanation of CO2 over High Surface Nickel/Aluminates Compounds Prepared by a Self-Generated Carbon Template
Autor/es | Roudane, Sarra
Bettahar, Noureddin Caballero Martínez, Alfonso Holgado, Juan Pedro |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2023 |
Fecha de depósito | 2024-05-09 |
Publicado en |
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Resumen | Catalytic gas-phase hydrogenation of CO2 into CH4 was tested under three different nickel/aluminate catalysts obtained from precursors of hexaaluminate composition (MAl16O19, M = Mg, Ca, Ba). These catalysts were prepared ... Catalytic gas-phase hydrogenation of CO2 into CH4 was tested under three different nickel/aluminate catalysts obtained from precursors of hexaaluminate composition (MAl16O19, M = Mg, Ca, Ba). These catalysts were prepared using a carbon template method, where carbon is self-generated from a sol-gel that contains an excess of citric acid and the Al and M salts (Ba2+, Ca2+, Mg2+) by two-step calcination in an inert/oxidizing atmosphere. This procedure yielded Ni particles decorating the surface of a porous high surface area matrix, which presents a typical XRD pattern of aluminate structure. Ni particles are obtained with a homogeneous distribution over the surface and an average diameter of ca 25–30 nm. Obtained materials exhibit a high conversion of CO2 below 500 °C, yielding CH4 as a final product with selectivity >95%. The observed trend with the alkaline earth cation follows the order NiBaAlO-PRx > NiCaAlO-PRx > NiMgAlO-PRx. We propose that the high performance of the NiBaAlO sample is derived from both an appropriate distribution of Ni particle size and the presence of BaCO3, acting as a CO2 buffer in the process. |
Agencias financiadoras | Junta de Andalucía |
Identificador del proyecto | PID2020-119946RB-I00
ENE2017-88818-C2-1-R |
Cita | Roudane, S., Bettahar, N., Caballero Martínez, A. y Holgado, J.P. (2023). Methanation of CO2 over High Surface Nickel/Aluminates Compounds Prepared by a Self-Generated Carbon Template. Catalysts, 13 (1), 142. https://doi.org/10.3390/catal13010142. |
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