Intrinsic thiophene hydrodesulfurization kinetics of a sulfided NiMo/SiO2 model catalyst: volcano-type behavior

A realistic planar model of a silica-supported NiMo sulfide hydrotreating catalyst was used to study the intrinsic kinetics of thiophene hydrodesulfurization over a broad temperature range at atmospheric pressure. The specific nonporous nature of the model catalysts excludes possible diffusion limit...

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Veröffentlicht in:	Catalysis letters 2003-10, Vol.90 (3-4), p.117-122
Hauptverfasser:	BORGNA, A, HENSEN, E. J. M, COULIER, L, DE CROON, M. H. J. M, SCHOUTEN, J. C, VAN VEEN, J. A. R, NIEMANTSVERDRIET, J. W
Format:	Artikel
Sprache:	eng
Schlagworte:	Catalysis Catalysts Catalytic reactions Chemistry Exact sciences and technology General and physical chemistry Hydrodesulfurization Kinetics Organic chemistry Reaction kinetics Silicon dioxide Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Volcanoes
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Beschreibung
Zusammenfassung:	A realistic planar model of a silica-supported NiMo sulfide hydrotreating catalyst was used to study the intrinsic kinetics of thiophene hydrodesulfurization over a broad temperature range at atmospheric pressure. The specific nonporous nature of the model catalysts excludes possible diffusion limitations, which are commonly encountered in kinetic studies of their industrial porous analogues. The unique possibility to measure the intrinsic chemical kinetics over a large temperature range allowed us to observe a Volcano-type behavior for thiophene hydrodesulfurization. The specific kinetic parameters are discussed in terms of possible mechanisms.
ISSN:	1011-372X 1572-879X
DOI:	10.1023/B:CATL.0000004106.02254.b4