Activities of MFI-Supported Rhenium Catalysts for the Aromatization of Methane: Effect of Cationic Form of the Inorganic Carrier |
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| Authors: | Alper Sar?o?lan Ömer Tunç Sava?ç? Ay?e Erdem-?enatalar Vu Thu Ha Gilbert Sapaly Younès Ben Taârit |
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| Affiliation: | (1) Institut Des Recherches sur la Catalyse, C.N.R.S., Vileurbanne Cedex, 69626, France;(2) Present address: Energy Institute, TUBITAK Marmara Research Center, P.K. 21, Gebze, Kocaeli, 41470, Turkey;(3) Materials and Chemical Technologies Research Institute, TUBITAK Marmara Research Center, P.K. 21, Gebze, Kocaeli, 41470, Turkey;(4) Department of Chemical Engineering, İstanbul Technical University, Maslak, Istanbul, 34469, Turkey |
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| Abstract: | MFI type inorganic carrier was used in two different cationic forms, hydrogen and calcium respectively. MFI-supported molybdenum
and rhenium catalysts were prepared. The activities of the catalysts were compared for the aromatization reaction of methane.
Higher activity values were attained with the catalysts supported on HZSM-5. Aromatics were also observed with the catalysts
supported on CaZSM-5, despite their deficiency in acid sites. Highly dispersed rhenium is expected to be formed with the use
of the inorganic carrier in calcium form. On the other hand, lower reaction rates were observed with rhenium supported on
CaZSM-5, in spite of the improved dispersion of the active rhenium species on this catalyst. This was interpreted in terms
of the critical role of the acid sites in the conversion of methane to aromatics, compared to the improved dispersion of the
active metal. |
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| Keywords: | Molybdenum Rhenium MFI Acidity Methane Aromatics |
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