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Título : | Improved Pd/g-Al2O3–Ce catalysts for benzene combustion |
Palabras clave : | Nanotecnología |
Fecha de publicación : | 2008 |
Editorial : | Elsevier |
Resumen : | "The catalytic oxidation of benzene on Pd (0.5 wt%)/g-Al2O3–Ce catalysts with 1, 5 and 10 wt% Ce was investigated. The alumina–Ce supports were prepared by adding a Ce-nitrate precursor to an aluminum boehmite. The presence of Lewis acid sites was determined by FTIR-pyridine adsorption spectroscopy. By FTIR-CO adsorption, it was found that the presence of Ce leads to the stabilization of PdO on the supports. The presence of the PdO species on the Pd/g-Al2O3–Ce catalysts was confirmed by X-ray photoelectron spectroscopy (XPS). The combustion of benzene (2600 ppm) in air was carried out at atmospheric pressure. Two behaviors were observed: for the catalysts with low Ce content (1%) and without Ce, the combustion occurs in a broad temperature range 100–280 8C, meanwhile, catalysts with high Ce contents (5, 10%), the benzene combustion occurs in the range 220–280 8C. An activation treatment on Pd/g-Al2O3–Ce catalysts with a reactant mixture at 250 8C for 20 h reduces the temperature of the total combustion to 250 8C. A better stability on Pd/g-Al2O3–Ce catalysts containing 5 and 10% Ce was observed. " |
metadata.dc.identifier.*: | http://reini.utcv.edu.mx:80/handle/123456789/911 |
metadata.dc.language: | spa |
Aparece en las colecciones: | Artículos arbitrados |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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Artículo_Improved Pdg-Al2O3–Ce catalysts for benzene combustion.pdf | 465.61 kB | Adobe PDF | Visualizar/Abrir |
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