Mössbauer study of the sulfidation of hydrodesulfurization catalysts: so Called 'Co-Mo-S' phase observed in carbon-supported Co and Co-Mo Sulfide catalysts

M.W.J. Crajé, E. Gerkema, V.H.J. Beer, de, A.M. Kraan, van der

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademic

6 Citaten (Scopus)

Samenvatting

In-situ Mössbauer Emission Spectroscopy (MES) has been used to study the type of phases present in sulfided activated carbon-supported Co and Co-Mo hydrodesulfurization (HDS) catalysts. Most of the reported MES studies are performed on Co-Mo/Al2O3 catalysts. Co species in the so-called "Co-Mo-S" phase, so far only observed in sulfided catalysts containing Co and Mo, should govern the HDS activity. The present observations show that the same Co species in sulfided Co/C and Co-Mo/C catalysts, with the same quadrupole splitting (QS) as "Co-Mo-S" can be formed. Similar results are obtained for sulfided Fe/C and Fe-Mo/C catalysts. Furthermore, it turns out that the QS-value of the "active phase" in the sulfided Co/C and Co-Mo/C catalysts depends on the sulfiding temperature and Co content. Hence, it seems unlikely that there will be only one well defined active sulfide phase which governs the HDS activity.
Originele taal-2Engels
TitelHydrotreating Catalysts - Preparation, Characterization and Performance, Proceedings of the Annual International AlChE Meeting, Washington, DC
RedacteurenL. Occelli, R.G. Anthony
Plaats van productieAmsterdam
UitgeverijElsevier
Pagina's165-179
ISBN van geprinte versie0-444-88032-1
DOI's
StatusGepubliceerd - 1989
Evenement1988 AIChE Annual Meeting - Washington, Verenigde Staten van Amerika
Duur: 27 nov 19882 dec 1988

Publicatie series

NaamStudies in Surface Science and Catalysis
Volume50
ISSN van geprinte versie0167-2991

Congres

Congres1988 AIChE Annual Meeting
LandVerenigde Staten van Amerika
StadWashington
Periode27/11/882/12/88
AnderAnnual international AIChE meeting ; (Washington/D.C.) : 1988.11.27-12.02

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    Crajé, M. W. J., Gerkema, E., Beer, de, V. H. J., & Kraan, van der, A. M. (1989). Mössbauer study of the sulfidation of hydrodesulfurization catalysts: so Called 'Co-Mo-S' phase observed in carbon-supported Co and Co-Mo Sulfide catalysts. In L. Occelli, & R. G. Anthony (editors), Hydrotreating Catalysts - Preparation, Characterization and Performance, Proceedings of the Annual International AlChE Meeting, Washington, DC (blz. 165-179). (Studies in Surface Science and Catalysis; Vol. 50). Elsevier. https://doi.org/10.1016/S0167-2991(08)60497-8, https://doi.org/10.1016/0169-4332(91)90157-F