153169 20251017144649.0 doi 10.1016/j.cattod.2025.115262 sideral 143633 ART-2025-143633 eng Mercader, V.D. Universidad de Zaragoza (orcid)0000-0003-0395-0143 Optimizing Sorption Enhanced Methanation (SEM) of CO2 with Ni3Fe + LTA 5 A mixtures 2025 Access copy available to the general public Unrestricted This study investigates the integration of catalytic CO2 methanation and water adsorption using a Ni-Fe-based catalyst and LTA 5 A zeolite to enhance methane production via the Sabatier reaction. By mitigating thermodynamic limitations through in situ water removal, the research explores key operational parameters, including temperature, space velocity, and H₂:CO₂ feed ratios, to optimize process performance. The findings highlight that a temperature of 300 °C, a WHSV of 1.50 × 104 (STP) mL·gcat−1·h−1 (4.86 gCO2·gcat⁻¹·h⁻¹), and a H₂:CO₂ molar ratio equal to 5:1, result in enhanced methane yields, shifting thermodynamic equilibrium due to water sorption during initial stages. The presence of methane in the feed, representative of a biogas, demonstrated negligible effects on methane yields under optimal conditions, underscoring the method’s feasibility for direct biogas upgrading. While the process achieved significant intensification, challenges such as loss of activity of the bed of solids (catalyst plus water adsorbent) were identified, necessitating further advancements in both catalyst and adsorbent stability, as well as a deeper study on their interaction. The study provides a pathway for scaling up adsorption-enhanced methanation technologies to achieve renewable methane production, addressing the dual goals of carbon management and energy storage. info:eu-repo/grantAgreement/ES/AEI/PID2022-136947OB-I00 info:eu-repo/grantAgreement/ES/DGA/T43-23R info:eu-repo/grantAgreement/ES/MICINN/PRE2020-095679 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Aragüés-Aldea, P. Universidad de Zaragoza (orcid)0000-0001-6452-4258 Durán, P. Universidad de Zaragoza (orcid)0000-0003-2898-1085 Francés, E. Universidad de Zaragoza (orcid)0000-0003-3181-195X Herguido, J. Universidad de Zaragoza (orcid)0000-0003-1940-9597 Peña, J.A. Universidad de Zaragoza (orcid)0000-0002-8383-4996 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 5005 X Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Proy. investigación HKA 453 (2025), 115262 [8 pp.] Catal. today Catalysis Today 0920-5861 1053696 http://zaguan.unizar.es/record/153169/files/texto_completo.pdf Versión publicada 2467354 http://zaguan.unizar.es/record/153169/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:153169 articulos driver 2025-10-17-14:35:42 ARTICLE