Artículo
Investigation of a Pt containing washcoat on SiC foam for hydrogen combustion applications
Autor/es | Fernández Camacho, Asunción
Arzac, G. M. Vogt, U.F. Hosoglu, F. Borgschulte, A. Jiménez de Haro, María del Carmen Montes, O. Züttel, A. |
Departamento | Instituto de Ciencia de Materiales de Sevilla (ICMS) – CIC Cartuja |
Fecha de publicación | 2016 |
Fecha de depósito | 2018-11-29 |
Publicado en |
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Resumen | A commercial Pt based washcoat, used for catalytic methane combustion, was studied supported on a commercial SiC foam as catalytic material (Pt/SiC) for catalytic hydrogen combustion (CHC). Structural and chemical ... A commercial Pt based washcoat, used for catalytic methane combustion, was studied supported on a commercial SiC foam as catalytic material (Pt/SiC) for catalytic hydrogen combustion (CHC). Structural and chemical characterization was performed using Electron Microscopy, X-Ray Diffraction (XRD) and X-Ray Photoelectron Spectroscopy (XPS). The reaction was monitored following water concentration by Fourier Transform Infrared spectra (FTIR). The FTIR method was compared with H2 detection by Gas Cromatography (GC) and has shown to be adequate to study the kinetics of the CHC reaction in steady state under our experimental conditions (very lean 1% (v/v) H2/air mixtures). The catalyst is composed of 5–20 nm disperse Pt nanoparticles decorating a mixture of high surface area Al2O3 and small amounts of ceria supported on the SiC foam which also contains alumina as binder. The Pt/SiC catalytic material has demonstrated to be active enough to start up the reaction in a few seconds at room temperature. The material has been able to convert at least 18.5 Lhydrogen min−1 gPt−1 at room temperature in conditions of excess of catalyst. The Pt/SiC material was studied after use using XPS and no significant changes on Pt oxidation states were found. The material was characterized from a kinetic point of view. From the conversion-temperature plot a T50 (temperature for 50% conversion) of 34 °C was obtained. Activation energy measured in our conditions was 35 ± 1 kJ mol−1. |
Identificador del proyecto | CT-REGPOT-2011-1-285895
CTQ2012- 32519 PIE 201460E018 TEP217 PE2012 TEP862 |
Cita | Fernández Camacho, A., Arzac di Tomaso, G.M., Vogt, U.F., Hosoglu, F., Borgschulte, A., Jiménez de Haro, M.d.C.,...,Züttel, A. (2016). Investigation of a Pt containing washcoat on SiC foam for hydrogen combustion applications. Applied Catalysis B - Environmental, 180, 336-343. |
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