Preparation and characterization of Pt/HMFI-SBA-15 hybrid catalyst for tetralin transformation
Por:
Contreras, R, Ramirez, J, Cuevas-Garcia, R, Gutierrez-Alejandre, A, Castillo-Villalon, P, Macias, G, Puente-Lee, I
Publicada:
1 ene 2010
Resumen:
A Pt catalyst supported on a hybrid material, HMFI-SBA-15, was prepared. Both, support and catalyst (Pt/HMFI-SBA-15) were characterized by nitrogen physisorption, small and wide (2?) angle XRD patterns, FT-IR, SEM and HRTEM. The acidic properties of the hybrid material were studied by cumene dealkylation and those of the catalyst were studied by FT-IR of adsorbed pyridine. The catalyst, Pt/HMFI-SBA-15, was tested for tetralin transformation at various reaction temperatures 498, 523, 548, 573, 585 and 598 K. Wide-angle XRD and FT-IR in the skeletal region indicate the presence of MFI zeolite fragments incorporated onto SBA-15. The characterization of the acid sites on the support by cumene dealkylation and FT-IR pyridine adsorption revealed the presence of Brönsted acid sites related to the HMFI zeolite fragments in the hybrid materials. For the catalyst, a homogeneous distribution of Pt clusters was found by HRTEM. In the transformation of tetralin, at all the reaction temperatures, the main products were trans + cis-decalins. However, at high reaction temperature ring contraction to spirodecane and dehydrogenation to naphthalene were observed. At 598 K, a maximum of 8% of ring contraction products was obtained. © 2009 Elsevier B.V. All rights reserved.
Filiaciones:
Contreras, R:
Univ Nacl Autonoma Mexico, UNICAT, Depto Ing Quim, Fac Quim, Mexico City 04510, DF, Mexico
Ramirez, J:
Univ Nacl Autonoma Mexico, UNICAT, Depto Ing Quim, Fac Quim, Mexico City 04510, DF, Mexico
Cuevas-Garcia, R:
Univ Nacl Autonoma Mexico, UNICAT, Depto Ing Quim, Fac Quim, Mexico City 04510, DF, Mexico
Gutierrez-Alejandre, A:
Univ Nacl Autonoma Mexico, UNICAT, Depto Ing Quim, Fac Quim, Mexico City 04510, DF, Mexico
Castillo-Villalon, P:
Univ Nacl Autonoma Mexico, UNICAT, Depto Ing Quim, Fac Quim, Mexico City 04510, DF, Mexico
Macias, G:
Univ Nacl Autonoma Mexico, UNICAT, Depto Ing Quim, Fac Quim, Mexico City 04510, DF, Mexico
Puente-Lee, I:
Univ Nacl Autonoma Mexico, Fac Quim, USAI, Mexico City 04510, DF, Mexico
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