Optimum Ni composition in sulfided Ni-Mo hydrodesulfurization catalysts: Effect of the support

Journal Article · Sun May 01 04:00:00 EDT 1994 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1006/jcat.1994.1149· OSTI ID:7036631

Laine, J; Severino, F; Labady, M ^[1]

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1. Instituto Venezolano de Investigaciones Cientificas, Caracas (Venezuela)

A synergistic effect of the support in Ni-Mo hydrodesulfurization (HDS) catalysts has been recently proposed, suggesting that in the case of a carbon support, this functions in conjunction with molybdenum sulfide to promote the exposure of nickel active centers. This effect is a possible explanation for the higher HDS activity of carbon-supported catalysts with respect to conventional catalysts reported earlier; however, there are insufficient clues as to which carbon characteristics are involved in the activity promotion. Taking into account that a variety of different supports have been studied for HDS catalysts in the past, e.g., alumina, silica, titania, zeolites, and carbon, it is interesting to investigate how the intrinsic activity can be affected by the differences in the nature of the support, especially whether the presence of a particular active phase or structure could be promoted by choosing an appropriate support. In this communication, the authors present evidence suggesting that two different active Ni-Mo sulfide structures can exist in HDS catalysts, the presence of either one being possibly determined by the nature of the support employed. In addition, the study focusses on the possible properties of carbon supports that may be responsible for the higher activity referred to above. 10 refs., 3 figs., 1 tab.

• OSTI ID: 7036631
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 147:1; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
ELEMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NICKEL COMPOUNDS
NICKEL SULFIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
SULFIDES
SULFUR COMPOUNDS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ZEOLITES