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Tuning Hydrodesulfurization Active-Phase Dispersion using Optimized Mesoporous Titania-Doped Silica Supports.
- Source :
- ChemCatChem; Jan2014, Vol. 6 Issue 1, p328-338, 11p
- Publication Year :
- 2014
-
Abstract
- Solids composed of TiO<subscript>2</subscript> nano-crystallites (10-40 wt %) dispersed in an SBA-15 matrix were synthesised and used as hydrodesulfurisation (HDS) active-phase supports. Well-dispersed polymolybdate species were detected by Raman spectroscopy on all the CoMo-based oxidic precursors. Undesirable bulk CoMoO<subscript>4</subscript> mixed oxide was also detected on the surface of low-TiO<subscript>2</subscript>-content materials, which suggests the enhancement of the Mo oxidic species dispersion as a result of the presence of TiO<subscript>2</subscript>. After activation under H<subscript>2</subscript>/H<subscript>2</subscript>S, the obtained catalysts were tested in the HDS of thiophene. An optimum conversion was observed for the catalyst supported on the solid that contained 20 wt % TiO<subscript>2</subscript>, which outperformed the homologous samples supported on TiO<subscript>2</subscript> and SBA-15. This clearly highlights the beneficial effect of using such nano-TiO<subscript>2</subscript>-SBA-15 composite supports, in which SBA-15 confers adequate textural properties to the system, and the active phase benefits from the dispersive effect of TiO<subscript>2</subscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18673880
- Volume :
- 6
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- ChemCatChem
- Publication Type :
- Academic Journal
- Accession number :
- 93629819
- Full Text :
- https://doi.org/10.1002/cctc.201300521