Effect of the titanium incorporation method on the morphology and HDS activity of supported ternary Ni-Mo-W/SBA-16 catalysts
Por:
Alonso-Perez, M. O., Pawelec, B., Zepeda, T. A., Alonso-Nunez, G., Nava, R., Navarro, R. M., Huirache-Acuna, R.
Publicada:
1 ene 2021
Resumen:
A series of trimetallic Ni-Mo-W catalysts supported on cubic mesoporous
silica (SBA-16) modified with Ti were prepared with the aim to study the
effect of Ti incorporation method (sol-gel against pore volume
post-synthesis impregnation) on the physical and chemical properties of
the synthetized materials. The catalytic behavior of the sulfided
catalysts was evaluated in the reaction of hydrodesulfurization (HDS) of
dibenzothiophene (DBT). The catalyst characterization by variety of
techniques demonstrated that one-pot synthesis led to Ti ions
incorporation into SBA-16 structure and an increase of acidity whereas
the post-synthesis method led to formation of octahedral Ti species
decorating support's surface. The catalytic behavior was closely linked
with the characteristics of their oxide precursors. The catalysts
prepared by sol-gel method demonstrated to be more effective toward
S-removal from DBT than the catalyst modified by post-synthesis method.
The initial HDS activity of the best NiMoW/S16-Ti catalyst doubled that
of NiMoW/SBA-16 and a commercial NiMo/gamma-Al2O3 which was linked with
its better textural properties, acidity and adequate active phases
dispersion. The main effect of the support modification with Ti was the
enhancement of selectivity toward HYD route products. The best
hydrogenation selectivity was archived by Ti incorporation via
post-synthesis method which was linked to the formation of curved
Mo(W)S-2 layers having a large amount of ``brim'' HYD sites.
Filiaciones:
Alonso-Perez, M. O.:
Univ Michoacana, Fac Ingn Quim, Ciudad Univ, Morelia 58060, Michoacan, Mexico
Pawelec, B.:
(Corresponding Author), CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, Spain
CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, Spain
Zepeda, T. A.:
UNAM, Ctr Nanociencias & Nanotecnol, Km 107 Carretera Tijuana Ensenada, Ensenada 22800, BC, Mexico
Alonso-Nunez, G.:
UNAM, Ctr Nanociencias & Nanotecnol, Km 107 Carretera Tijuana Ensenada, Ensenada 22800, BC, Mexico
Nava, R.:
Univ Autonoma Queretaro UAQ, Fac Ingn, Div Invest & Posgrad, Ctr Univ, Queretaro 76000, Qro, Mexico
Univ Autonoma Queretaro UAQ, Fac Quim, Ctr Univ, Queretaro 76000, Qro, Mexico
Navarro, R. M.:
CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, Spain
Huirache-Acuna, R.:
(Corresponding Author), Univ Michoacana, Fac Ingn Quim, Ciudad Univ, Morelia 58060, Michoacan, Mexico
Univ Michoacana, Fac Ingn Quim, Ciudad Univ, Morelia 58060, Michoacan, Mexico
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