A kinetic study for NO catalytic reduction on silica sub-micron diameter tubes with platinum nanoparticles

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Title: A kinetic study for NO catalytic reduction on silica sub-micron diameter tubes with platinum nanoparticles
Authors: Rosas, Juana M. | Ruiz-Rosas, Ramiro | Rodríguez-Mirasol, José | Cordero, Tomás
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Instituto Universitario de Materiales
Keywords: NOx | SCR | Platinum | Nanoparticles | Silica nanotubes | Coaxial electrospinning | Reaction mechanism
Knowledge Area: Química Inorgánica
Issue Date: 1-Nov-2017
Publisher: Elsevier
Citation: Chemical Engineering Journal. 2017, 327: 351-360. doi:10.1016/j.cej.2017.06.115
Abstract: The selective catalytic reduction (SCR) of NOx with C3H6 in the presence of O2 on silica sub-microtubes with platinum nanoparticles was studied in order to establish a possible reaction mechanism at different experimental conditions. This catalyst showed a high NO conversion with very high selectivity to N2 at mild conditions in the presence of excess oxygen when using C3H6 as reducing agent. The influence of both NO and C3H6 concentrations on their conversions was analyzed at different space times. The obtained results suggest that the three reactants (C3H6, NO, and O2) are adsorbed on Pt sites. The kinetic model proposed considers that both dissociative adsorption of NO and activation of the hydrocarbon can take place simultaneously. Nevertheless, the value of the parameters obtained by the resolution of the model equations indicates that the first one presents a major relevance. These results are in concordance with the high selectivity to N2 observed, because the preponderance presence of dissociated NO avoids the formation of N2O by the reaction of molecular NO with N dissociated from NO. Furthermore, both NO reduction and C3H6 oxidation conversions are represented reasonably well by the model presented.
Sponsor: This work was supported by the Spanish Ministry of Economy and Competitiveness under CTQ2012-36408 and CTQ2015-68654-R projects.
URI: http://hdl.handle.net/10045/70594
ISSN: 1385-8947 (Print) | 1873-3212 (Online)
DOI: 10.1016/j.cej.2017.06.115
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 Elsevier B.V.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.cej.2017.06.115
Appears in Collections:INV - MCMA - Artículos de Revistas

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