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http://ciatec.repositorioinstitucional.mx/jspui/handle/1019/202| Deep Hydrodesulfurization of Dibenzothiophenes Over NiW Sulfide Catalysts Supported on Sol–Gel Titania–Alumina | |
| VICTOR ALEJANDRO SUAREZ TORIELLO | |
| Acceso Abierto | |
| Atribución-NoComercial | |
| Catalizadores Hidrodesulfuración | |
| This work showed that the use of Al2O3–TiO2 as carriers has a positive effect on the activity of supported NiW catalysts in the hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene carried out in a batch reactor at 320 _C and total H2 pressure of 5.5 MPa. Two Al2O3–TiO2 mixed oxides with Al/Ti atomic ratios of 10 and 2 were synthesized by sol–gel method together with the pure Al2O3 synthesized as reference support. For NiW/ Al2O3–TiO2 and NiW/Al2O3 catalysts, a metal load of 17 and 5.5 wt% of W and Ni were considered respectively. It was found that both Al2O3–TiO2-supported catalysts exhibited higher activity than alumina-supported one. The catalyst with a largest TiO2 content (NiW/AT2) demonstrated to be 23 % more active with respect to NiW/Al2O3. Solids were characterized by temperature-programmed reduction (TPR), high resolution transmission electronic microscopy and X-ray photoelectronic spectroscopy (XPS) techniques. A decrease in support–metal interaction (from TPR) was observed when Ti content increased, which could lead to a higher amount of NiWS phase (from XPS). Besides, a slight increase in the slabs length in WS2 was observed for titania-containing catalyst with respect to NiW/Al2O3, indicating that the dispersion can still be optimized. The atomic ratio Al/Ti = 2 of the NiW/Al2O3– TiO2 catalyst proved to be a potential substitute for current catalysts for sulfur reduction in ultra-clean diesel. | |
| 2015 | |
| Artículo | |
| Inglés | |
| Empresas Estudiantes Investigadores Maestros | |
| CATÁLISIS | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos de investigación |
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| Toriello-DeepHydrodesulfurizationOfDibe.pdf | 1.21 MB | Adobe PDF | Visualizar/Abrir |