Characterization and HDS activity of Mo/TiO sub 2 and Ni(Co)-Mo/TiO sub 2 catalysts

Conference · Wed Apr 01 04:00:00 EST 1987 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5276342

Quincy, R B; Houalla, M; Hercules, D M

A series of Mo/TiO{sub 2} catalysts ranging from 1 to 15 wt% MoO{sub 3} was prepared by incipient wetness impregnation. The catalysts were characterized by laser Raman spectroscopy (LRS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS, ESCA), and gravimetric analysis. The Mo interaction species and MoO{sub 3} were identified and quantitated by Raman spectroscopy. The Mo interaction species increased with Mo loading up to 6 wt% MoO{sub 3} and leveled off at higher Mo loadings. MoO{sub 3} is detected at 7.5 wt% MoO{sub 3}/TiO{sub 2} and increased linearly with further Mo additions. The molybdenum speciation determined from Raman data is shown to correlate with ESCA and XRD measurements. The reduction characteristics of molybdenum on titania depend on Mo loading, and a lower average Mo oxidation state is found for Mo/TiO{sub 2} than previously reported for comparable loadings of Mo/Al{sub 2}O{sub 3} catalysts. Correlation between structure and thiophene hydrodesulfurization activity is presented for the Mo/TiO{sub 2} series. The influence of nickel (cobalt) addition on the surface structure and the reactivity of the Mo/TiO{sub 2} catalysts is also examined.

• OSTI ID: 5276342
• Report Number(s): CONF-8704345--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Journal Volume: 32:1
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COBALT
COHERENT SCATTERING
DATA
DESULFURIZATION
DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
EXPERIMENTAL DATA
GRAVIMETRIC ANALYSIS
HETEROCYCLIC COMPOUNDS
INFORMATION
LASER SPECTROSCOPY
LASERS
METALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
POLYCYCLIC SULFUR HETEROCYCLES
QUANTITATIVE CHEMICAL ANALYSIS
RAMAN SPECTROSCOPY
REDUCTION
SCATTERING
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE
X-RAY DIFFRACTION