Titania modified SBA-15 as the support for molybdenum based catalysts

SBA-15 Mesoporous Silica as Catalytic Support for Hydrodesulfurization Catalysts—Review

“…The Ti-containing SBA-15 solids were prepared with varying Ti loading (up to 19 wt % of TiO 2 ) by a post-synthesis grafting procedure. In good agreement with the study by Laniecki and Wojtowski [ 42 ], the catalyst characterization by different techniques confirmed that this method of Ti incorporation onto SBA-15 led to highly dispersed titanium species without substantial loss of SBA-15 textural characteristics. The catalysts supported on SBA-15 grafted with Ti exhibited a stronger metal-support interaction and a better dispersion of the oxidic and sulfided metal species than its Ti-free counterpart.…”

“…The catalyst characterization results presented by Laniecki and Wojtowski [ 42 ] suggest that Ti-SBA-15 could be appropriate support for molybdenum-based hydrotreating catalysts. The Ti-SBA-15 supports were prepared by post-synthesis grafting of the SBA-15 with titanium isopropoxide as Ti source.…”

“…The use of different sources of Mo (ammonium heptamolybdate and molybdenum carbonyl) leads to formation of different molybdenum oxide species. On the basis of the results of the characterization of oxide catalyst precursors, the authors deduced that catalyst activation by sulfidation or nitridation might lead to bifunctional catalysts active in HDS, HDN or hydrocracking reactions [ 42 ]. This was confirmed later by Gutiérrez et al [ 43 ] for NiMo/Ti-SBA-15 catalysts tested in HDS of 4,6-DMDBT reaction.…”

“…During the last two decades, various mesoporous structures have been synthesized, which can be roughly classified into three categories based on the pore types: nearly spherical cage, cylindrical channel and bi-continuous channel [19]. Among different ordered mesoporous silicas, SBA-type silicas are the most frequently studied [13,14,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,…”