Activities of MFI-supported rhenium catalysts for the aromatization of methane : Effect of cationic form of the inorganic carrier

Activities of MFI-supported rhenium catalysts for the aromatization of methane : Effect of cationic form of the inorganic carrier

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...

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Bibliographic Details
Published in:Catalysis letters Vol. 118; no. 1-2; pp. 123 - 128
Main Authors: SANOGLAN, Alper, TUNC SAVAGCI, Omer, ERDEM-SENATALAR, Ayge, VU THU HA, SAPALY, Gilbert, TAARIT, Younes Ben
Format: Journal Article
Language:English
Published: Dordrecht Springer 01-10-2007
Springer Nature B.V
Springer Verlag
Subjects:
Calcium
Catalysis
Catalysts
Cations
Chemical Sciences
Chemistry
Dispersion
Environment and Society
Environmental Sciences
Exact sciences and technology
General and physical chemistry
Ion-exchange
Methane
Rhenium
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Zeolites: preparations and properties
Methane
Aromatics
Heterogeneous catalysis
MFI
Aromatization
Transition metal
Acidity
Rhenium
Zeolite
Molybdenum
Molecular sieve
Supported catalyst
"MFI"
"Acidity"
"Methane"
"Rhenium"
"Molybdenum"
"Aromatics"
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Description
Summary: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.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-007-9166-x