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In-situ Raman spectroscopy study of Ru/TiO2 catalyst in the selective methanation of CO

Opened Access In-situ Raman spectroscopy study of Ru/TiO2 catalyst in the selective methanation of CO

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Autor: Martínez Tejada, Leidy Marcela
Muñoz Murillo, Ara
Centeno Gallego, Miguel Ángel
Odriozola Gordón, José Antonio
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2016
Publicado en: Journal of Raman Spectroscopy, 47, 189-197.
Tipo de documento: Artículo
Resumen: Raman spectroscopic technique has been used to characterize a Ru/TiO2 catalyst and to follow in situ their structural changes during the CO selective methanation reaction (S-MET). For a better comprehension of the catalytic mechanism, the in-situ Raman study of the catalysts activation (reduction) process, the isolated CO and CO2 methanation reactions and the effect of the composition of the reactive stream (H2O and CO2 presence) have been carried out. Raman spectroscopy evidences that the catalyst is composed by islands of TiO2¿RuO2 solid solutions, constituting Ru¿TiO2 interphases in the form of RuxTi1 xO2 rutile type solid solutions. The activation procedure with H2 at 300 °C promotes the reduction of the RuO2¿TiO2 islands generating Ruo ¿Ti3+ centers. The spectroscopic changes are in agreement with the strong increase in chemical reactivity as increasing the carbonaceous intermediates observed. The selective methanation of CO proceeds after their adsorption on these Ruo ¿Ti3+ acti...
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Cita: Martínez Tejada, L.M., Muñoz Murillo, A., Centeno Gallego, M.Á. y Odriozola Gordón, J.A. (2016). In-situ Raman spectroscopy study of Ru/TiO2 catalyst in the selective methanation of CO. Journal of Raman Spectroscopy, 47, 189-197.
Tamaño: 376.3Kb
Formato: PDF

URI: https://hdl.handle.net/11441/71311

DOI: 10.1002/jrs.4774

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