Two groups of samples were studied for the aromatization of methane over Mo-Fe/ZSM-5 catalysts. The first group contains fixed loading (5 wt%) and variable Mo/Fe ratio. The second group was prepared with fixed Mo/Fe ratio and variable loading. The samples were characterized by TGA, SBET, XRD, NH3-TPD and TPO analysis. NH3-TPD results indicate that the strength of strong acid sites increases when Mo/Fe ratio decreases for samples with fixed loading. The amount of strong sites decreases and new intermediate acid sites appear on samples containing both Mo and Fe. XRD results show the presence of iron molybdate for samples impregnated with both Mo and Fe. The catalytic properties of these samples were related not only to the amount and strength of acid sites but also to the iron molybdate phase.

High loading Fe-supported Fischer-Tropsch catalysts : optimization of the catalyst performance / C. Pirola, C.L. Bianchi, A. Di Michele, P. Diodati, S. Vitali, V. Ragaini. - In: CATALYSIS LETTERS. - ISSN 1011-372X. - 131:1(2009 Aug), pp. 294-304.

High loading Fe-supported Fischer-Tropsch catalysts : optimization of the catalyst performance

C. Pirola
Primo
;
C.L. Bianchi
Secondo
;
S. Vitali
Penultimo
;
V. Ragaini
Ultimo
2009

Abstract

Two groups of samples were studied for the aromatization of methane over Mo-Fe/ZSM-5 catalysts. The first group contains fixed loading (5 wt%) and variable Mo/Fe ratio. The second group was prepared with fixed Mo/Fe ratio and variable loading. The samples were characterized by TGA, SBET, XRD, NH3-TPD and TPO analysis. NH3-TPD results indicate that the strength of strong acid sites increases when Mo/Fe ratio decreases for samples with fixed loading. The amount of strong sites decreases and new intermediate acid sites appear on samples containing both Mo and Fe. XRD results show the presence of iron molybdate for samples impregnated with both Mo and Fe. The catalytic properties of these samples were related not only to the amount and strength of acid sites but also to the iron molybdate phase.
aromatization; benzene; Fe-Mo mixed oxides; methane conversion; Mo/ZSM-5
Settore ING-IND/25 - Impianti Chimici
Settore CHIM/04 - Chimica Industriale
ago-2009
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/66721
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