79617 20200113145617.0 doi 10.1016/j.fuel.2018.06.129 sideral 107024 ART-2018-107024 eng (orcid)0000-0001-8937-3783 Armenise, S. In situ generation of COx-free H2 by catalytic ammonia decomposition over Ru-Al-monoliths 2018 Access copy available to the general public Unrestricted Ru catalysts supported on alumina coated monoliths has been prepared employing three different precursor, which are ruthenium chloride, ruthenium nitrosyl nitrate and ruthenium acetyl acetonate, by an equilibrium adsorption method. The Ru particle sizes could be controlled varying the metal precursor salt. Among the prepared catalysts, Ru catalyst prepared from nytrosyl nitrate exhibited the highest activity which is concomitant to the largest mean Ru particle size of 3.5 nm. The values of the apparent activation energy calculated from the Arrhenius equation are according to the Temkin-Phyzev model, indicating that the recombinative desorption of N ad-atoms is the rate-determining step of the reaction. However, the ratio between the kinetic orders with respect to ammonia and hydrogen (-a/ß), is not in agreement to the valued predict by Temkin formalism. This fact could be related to the different operational conditions used during the reaction, and/or catalyst nature, but not to any change on the controlling step of the reaction. info:eu-repo/grantAgreement/EC/FP7/280658/EU/Doped carbon nanostructures as metal-free catalysts/FREECATS info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 5.128 2018 ENGINEERING, CHEMICAL 13 / 138 = 0.094 2018 Q1 T1 ENERGY & FUELS 20 / 103 = 0.194 2018 Q1 T1 1.745 2018 Chemical Engineering (miscellaneous) 2018 Q1 Organic Chemistry 2018 Q1 Fuel Technology 2018 Q1 Energy Engineering and Power Technology 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0001-9220-9909 Cazaña, F. Universidad de Zaragoza (orcid)0000-0002-7836-5777 Monzón, A. Universidad de Zaragoza García-Bordejé, E. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 233 (2018), 851-859 Fuel FUEL 0016-2361 476242 http://zaguan.unizar.es/record/79617/files/texto_completo.pdf Postprint 68850 http://zaguan.unizar.es/record/79617/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:79617 articulos driver 2020-01-13-14:53:51 ARTICLE