Support pretreatment and its effect on the catalyst structure and the hydrorefining performance of a catalyst

Conference · Mon Aug 01 04:00:00 EDT 1977 · Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)

OSTI ID:6444925

Kriz, J F; Ternan, M

Molybdenum-alumina hydrotreating catalysts were prepared by mulling of boehmite (alumina monohydrate) in dilute nitric acid to cause partial gel formation on the alumina surface, followed by impregnation with ammonium paramolybdate, drying, and calcining to convert the molybdenum to the trioxide. Electron microprobe analysis showed that the molybdenum was concentrated in the gelantinized parts of the alumina, resulting in a more even molybdenum distribution for catalysts prepared from spray-dried than from kiln-dried alumina, since in the latter case, the larger particles could not be completely gelatinized. In tests on the hydrodesulfurization of a 345/sup 0/-525/sup 0/C bp gas oil with 3.6% sulfur and 3000 ppM nitrogen obtained by hydrocracking of Athabasca tar sand bitumen, conversion was greater for catalysts prepared from spray-dried than kiln-dried alumina, particularly at larger particle sizes, but the actual amounts of sulfur and nitrogen removed and the product specific gravity were similar for both catalysts.

• OSTI ID: 6444925
• Conference Information: Journal Name: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States) Journal Volume: 22:3
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040403* -- Oil Shales & Tar Sands-- Refining
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DESULFURIZATION
DRYING
ELECTRON MICROPROBE ANALYSIS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS OILS
HIGH TEMPERATURE
HYDROCRACKING
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
METALS
MICROANALYSIS
MOLYBDENUM
NITRIC ACID
NITROGEN
NONMETALS
OIL SANDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PYROLYSIS
REFRACTORY METALS
SPRAY DRYING
SULFUR
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS