Metals chemistry on hydrotreating catalysts: NMR and EPR surveys of vanadium on spent catalyst materials

Journal Article · Thu Mar 15 04:00:00 EST 1979 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(79)90124-6· OSTI ID:6294352

Silbernagel, B G

NMR and EPR techniques are employed to study the chemistry of vanadium deposition on Co--Mo/..gamma..-Al/sub 2/O/sub 3/ catalysts during the hydrodesulfurization process. A common pattern of deposition is observed, independent of feed and catalyst support type, which consists of the consecutive appearance of three vanadium forms. A vanadyl (VO/sup 2 +/), different from that in the crude oil, dominates at low vanadium levels followed by a diamagnetic, apparently amorphous vanadium phase. At high metals loadings (greater than 10 wt %), the dominant form is a sulfide with composition close to V/sub 2/S/sub 3/. 6 figures, 1 table.

• Research Organization: Exxon Research and Engineering Co., Linden, NJ
• OSTI ID: 6294352
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 56:3; ISSN JCTLA
• Country of Publication: United States
• Language: English

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ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHARGED PARTICLES
COBALT
DATA
DATA FORMS
DEACTIVATION
DEPOSITION
ELECTRON SPIN RESONANCE
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
IONS
ISOLATED VALUES
MAGNETIC RESONANCE
MECHANICAL STRUCTURES
METALS
MOLYBDENUM
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PROCESSING
REFINING
REFRACTORY METALS
RESONANCE
SULFIDES
SULFUR COMPOUNDS
SUPPORTS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM COMPOUNDS
VANADIUM OXIDES
VANADIUM SULFIDES