135722 20260217205504.0 doi 10.1016/j.cattod.2024.114849 sideral 138733 ART-2024-138733 eng Durán, P. Universidad de Zaragoza (orcid)0000-0003-2898-1085 Biogas upgrading through CO2 methanation in a polytropic - distributed feed fixed bed reactor 2024 Access copy available to the general public Unrestricted Methanation of the CO2 contained in a biogas stream has been experimentally analyzed in a fixed bed reactor with a Ni-Mn catalyst, evaluating the effect of feeding reactants distributed throughout the bed. The performance of different feeding configurations (conventional cofeeding and others implying a lateral distribution of one of the reactive streams) has been analyzed for different nominal temperatures T (250–400 ºC) and weight-related space velocities WHSV (47.71–6.63 gCO2 gcat-1 h-1), always keeping a H2: CO2 ratio of 4:1, and a CH4:CO2 ratio of 7:3. For identical WHSV, the lateral biogas distribution (Poly-Biogas feeding configuration) always showed the best results in terms of activity (higher conversion at the same temperature) and selectivity (lower selectivity to CO in iso-conversion). These better results agree with what was observed in a previous work in methanation of CO2 (i.e., without methane in the feed). In that work, CO2 was distributed along the catalytic bed by several lateral feeds (Poly-CO2). When T was kept constant and WHSV was varied, the reactor fed with distributed biogas (Poly-Biogas), again confirmed its higher efficiency and better selectivity for biogas upgrading (i.e., higher CH4 content). Furthermore, by adopting a Poly-Biogas (or poly-CO2) feeding configuration, a more homogeneous temperature profile was achieved along the bed avoiding the severity of hot spots appearance. In contrast, the lateral distribution of hydrogen (Poly-H2) always led to similar or worse results than those for the conventional co-feeding configuration. info:eu-repo/grantAgreement/ES/AEI/PID2022-136947OB-I00 info:eu-repo/grantAgreement/ES/DGA/T43-23R info:eu-repo/grantAgreement/ES/MICINN/PID2019-104866RB-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2020-113809RB-C31/AEI/10.13039/501100011033 info:eu-repo/grantAgreement/ES/MICINN/PRE2020-095679 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 5.3 2024 CHEMISTRY, APPLIED 16 / 76 = 0.211 2024 Q1 T1 ENGINEERING, CHEMICAL 42 / 176 = 0.239 2024 Q1 T1 CHEMISTRY, PHYSICAL 62 / 185 = 0.335 2024 Q2 T2 1.05 2024 Chemistry (miscellaneous) 2024 Q1 Catalysis 2024 Q2 11.2 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Aragüés-Aldea, P. Universidad de Zaragoza (orcid)0000-0001-6452-4258 González-Pizarro, R. Universidad de Zaragoza (orcid)0009-0000-5038-2252 Mercader, V. D. Universidad de Zaragoza (orcid)0000-0003-0395-0143 Cazaña, F. Universidad de Zaragoza (orcid)0000-0001-9220-9909 Francés, E. Universidad de Zaragoza (orcid)0000-0003-3181-195X Peña, J. A. Universidad de Zaragoza (orcid)0000-0002-8383-4996 Herguido, J. Universidad de Zaragoza (orcid)0000-0003-1940-9597 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 2012 755 Universidad de Zaragoza Dpto. Química Física Área Química Física 440 (2024), 114849 [9 pp.] Catal. today Catalysis Today 0920-5861 2908129 http://zaguan.unizar.es/record/135722/files/texto_completo.pdf Versión publicada 2423463 http://zaguan.unizar.es/record/135722/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:135722 articulos driver 2026-02-17-20:23:05 ARTICLE