151528 20251017144547.0 doi 10.1016/j.ijhydene.2011.11.066 sideral 82180 ART-2012-82180 eng Romero, E. Universidad de Zaragoza (orcid)0000-0001-7814-2277 Molibdenum addition to modified iron oxides for improving hydrogen separation in fixed bed by redox processes 2012 Access copy available to the general public Unrestricted A system to produce hydrogen with high purity and without CO2 emissions briefly consists of two operating units: production and separation. The coupling of the steam-iron process to the cracking of methane can manage that goal. However the steam-iron process needs an active and stable redox solid at moderate temperatures. The most suitable (pure iron oxide) suffers quick and strong deactivation mainly due to the structural changes upon reduction-oxidation cycles. Among those tested in our laboratory, one promising solid was proposed: 98 wt%Fe2O3–1.75 wt%Al2O3–0.25 wt%CeO2. In this work, the expensive and rare cerium has been substituted by molybdenum. After optimizing the Mo amount in the solid, the long lasting experiments show that the new triple oxide, 98 wt%Fe2O3–1.75 wt%Al2O3–0.25 wt%MoO3, in spite of some initial deactivation, maintains slightly better hydrogen production rates than the cerium sample. At temperature and conditions studied the Mo-solid was able to run, without coke formation, under real exhaust gas from natural gas thermocatalytic decomposition, producing about 8.1 g of high purity (>99.995%) hydrogen h−1 kg of solid−1. This means a natural gas processing of about 68 Nm3 h−1 1000 kg of solid−1 (at 67% conversion of methane to hydrogen). info:eu-repo/grantAgreement/ES/MICINN/CTQ2007-64320 info:eu-repo/grantAgreement/ES/MICINN/ENE2010-16789 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.548 2012 ENERGY & FUELS 16 / 80 = 0.2 2012 Q1 T1 CHEMISTRY, PHYSICAL 38 / 134 = 0.284 2012 Q2 T1 ELECTROCHEMISTRY 7 / 26 = 0.269 2012 Q2 T1 info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion Soto, R. Durán, P. (orcid)0000-0003-2898-1085 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 37, 8 (2012), 6978-6984 Int. j. hydrogen energy International Journal of Hydrogen Energy 0360-3199 670446 http://zaguan.unizar.es/record/151528/files/texto_completo.pdf Preprint 2656436 http://zaguan.unizar.es/record/151528/files/texto_completo.jpg?subformat=icon icon Preprint oai:zaguan.unizar.es:151528 articulos driver 2025-10-17-14:10:14 ARTICLE