Participation of the promoter in the initial activity changes of hydrodesulfurization catalyst

Conference · Sat Aug 01 04:00:00 EDT 1981 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:6251337

Laine, J; Brito, J

Examination of the initial activity behavior of a series of alumina-supported catalysts of various Ni and Mo concentrations was carried out to define the involvement of Ni on the initial transformation of molybdenum catalysts. The hydrodesulfurization (HDS) activity of the catalysts was measured using a continuous flow reactor at atmospheric pressure connected to an on-line gas chromatograph. The surface area of the catalysts did not vary significantly with Ni content, hoever, it did change with Mo content. Addition of Ni as a promoter was found to increase remarkably the catalytic activity of the catalyst, and there is a continuous growth in activity to a maximum near concentrations of commercial catalysts (% NiO/% MoO/sub 3/ = 3/10 to 5/15). This positive role of promoter can be related to three effects whereby the promoter inhibits Al/sub 2/(MoO/sub 4/)/sub 3/ formation, inhibits MoS/sub 2/ crystallite growth, and inhibits carbon deposition on the oxide surface, but the promoter role cannot be conclusively defined at this time. (BLM)

• Research Organization: Instituto Venezolano de Investigaciones Cientificas, Caracas, Venezuela
• OSTI ID: 6251337
• Report Number(s): CONF-810813-Vol.1
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 26:3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400* -- Petroleum-- Processing
CARBON
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEPOSITION
DESULFURIZATION
ELEMENTS
HYDROCARBONS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NICKEL COMPOUNDS
NICKEL OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROMOTERS
TRANSITION ELEMENT COMPOUNDS