Molybdenum/carbon catalysts for reforming reactions
- 1 January 1980
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 76, 1811-1820
- https://doi.org/10.1039/f19807601811
Abstract
The activities and selectivities of Mo/C and Mo/Al2O3 catalysts (prepared by impregnating a coconut charcoal and γ-Al2O3, respectively, with ammonium heptamolybdate) have been determined for the reforming of cyclohexane, n-hexane, methylcyclopentane and n-heptane in a microreactor by pulse and flow techniques at 1 atm and 773 K. The Mo/C catalyst was more selective and more stable than the Mo/Al2O3 catalyst. The Mo/C catalyst was more active for dehydrogenation and dehydrocylisation whereas Mo/Al2O3 was more active for ring expansion, isomerization and cracking. Over Mo/C in the pulse experiments the predominant cracked product was methane. The Mo/C catalyst behaved mainly as a metallic-type catalyst catalysing ring-closure reactions (n-hexane to benzene, n-heptane to toluene) directly and not via a methylcyclopentane intermediate, while the Mo/Al2O3 catalyst had both metallic and acidic functions. The molybdenum catalysts are compared with Pt/Al2O3 catalysts.Keywords
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