135502 20260217205556.0 doi 10.1016/j.cej.2024.151962 sideral 138644 ART-2024-138644 eng Tsiotsias, Anastasios I. Integrating capture and methanation of CO2 using physical mixtures of Na-Al2O3 and mono-/ bimetallic (Ru)Ni/Pr-CeO2 2024 The integrated capture and methanation of CO2 is hereby realized via the use of physical mixtures of a 12 % Na2O/Al2O3 adsorbent and either a monometallic (10 % Ni/Pr-CeO2) or a bimetallic (1 % Ru, 10 % Ni/Pr–CeO2) catalyst. The effect of the weight ratio between the catalyst and the adsorbent components is studied and it is found to exert a great influence in the reaction kinetics and the CH4 production capacity, with the 1:3 catalyst: adsorbent weight ratio (2.5 wt% Ni for both physically mixed materials and 0.25 wt% Ru for the bimetallic material) providing the highest CH4 yield. It is further shown that the materials offer high activity, stability and CH4 selectivity at just 300 °C, even under the co–presence of O2 and H2O during CO2 adsorption, a fact attributable to the preservation of the Ni-CeO2 contact, which is known to afford a high reducibility to the catalytically active Ni phase. The presence of Ru can further enhance the material reducibility and activity under low operation temperatures and catalyst: adsorbent weight ratios, while also mitigating the negative effect of the O2 and H2O presence in the adsorption feed. A CH4 yield of 0.24 mmol/g after 10 consecutive cycles of CO2 adsorption (under O2 and H2O containing gas) and methanation is achieved for the monometallic Ni-based physically mixed material, compared to 0.29 mmol/g in the case of the Ru–Ni bimetallic physically mixed material. info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 13.2 2024 ENGINEERING, ENVIRONMENTAL 3 / 83 = 0.036 2024 Q1 T1 ENGINEERING, CHEMICAL 8 / 176 = 0.045 2024 Q1 T1 2.696 2024 Chemical Engineering (miscellaneous) 2024 Q1 Industrial and Manufacturing Engineering 2024 Q1 Environmental Chemistry 2024 Q1 Chemistry (miscellaneous) 2024 Q1 20.6 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Charisiou, Nikolaos D. Hussien, Aseel G.S. Sebastian, Victor Universidad de Zaragoza (orcid)0000-0002-6873-5244 Polychronopoulou, Kyriaki Goula, Maria A. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 491 (2024), 151962 [18 pp.] Chem. eng. j. Chemical Engineering Journal 1385-8947 12465220 http://zaguan.unizar.es/record/135502/files/texto_completo.pdf Versión publicada 2486271 http://zaguan.unizar.es/record/135502/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:135502 articulos driver 2026-02-17-20:42:50 ARTICLE