Oxygen chemisorption: its relationship to hydrotreating activity of alumina-supported nickel-molybdenum catalysts

Journal Article · Thu Nov 01 04:00:00 EST 1984 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(84)90078-2· OSTI ID:6061592

Millman, W S; Bartholomew, C H; Richardson, R L

Oxygen chemisorption capacities of sulfided alumina-supported Ni-Mo catalysts were determined by pulse and static adsorption methods at ambient temperatures. The pulse method resulted in lower chemisorption uptakes compared to the static method. Static to pulse uptake ratios of 2.12 to 3.03 were observed for freshly sulfided catalysts while values of 1.70 to 1.92 were obtained for catalysts which had been tested for hydrodenitrogenation (HDN) activity. A general trend of increasing O/sub 2/ chemisorption uptake with increasing activity for removal of basic nitrogen, total nitrogen, and sulfur was observed for Ni-Mo catalysts. However, because variations in the specific O/sub 2/ chemisorption capacity per activity unit among these three reactions were small (+/- 10%), it does not appear that O/sub 2/ adsorption is selective for the active sites of any one reaction, rather, it is probably proportional to the sum of these different sites. Comparison of the O/sub 2/ adsorption capacity with the activity data (reproducibility +/-3%) indicates the use of O/sub 2/ adsorption can distinguish large differences in catalyst activity (>25%) but not smaller differences. 27 references, 6 tables.

• Research Organization: Union Oil Co. of California, Brea
• OSTI ID: 6061592
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 90:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
CORRELATIONS
DATA
DENITRIFICATION
DESULFURIZATION
EFFICIENCY
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GAS OILS
HYDROGENATION
INFORMATION
KINETICS
LEAST SQUARE FIT
MATHEMATICAL MODELS
MAXIMUM-LIKELIHOOD FIT
METALS
MOLYBDENUM
NICKEL
NONMETALS
NUMERICAL DATA
NUMERICAL SOLUTION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SULFIDATION
SURFACE PROPERTIES
TRANSITION ELEMENTS