2024-03-29T01:53:57Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1712812019-09-04T07:04:51Zcom_10261_35com_10261_5col_10261_288
In-situ generation of COx-Free H2 by catalytic ammonia decomposition over Ru-Al-Monoliths
Armenise, Sabino
Cazaña, Fernando
Monzón Bescós, Antonio
García-Bordejé, José Enrique
European Commission
García-Bordejé, Enrique [0000-0001-8158-1270]
Structured reactors
Ru-catalyst
Ammonia decomposition
Kinetics COx-free
Nanoparticle
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 (−α/β), 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.
2018-10-19T11:17:39Z
2018-10-19T11:17:39Z
2018-07-05
artículo
Fuel 233: 851-859 (2018)
0016-2361
http://hdl.handle.net/10261/171281
10.1016/j.fuel.2018.06.129
1873-7153
http://dx.doi.org/10.13039/501100000780
eng
Preprint
https://doi.org/10.1016/j.fuel.2018.06.129
Sí
info:eu-repo/grantAgreement/EC/FP7/280658
openAccess
Elsevier