Chemisorption studies of promoted solid-state HDS catalysts

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90044-I· OSTI ID:6938920

Lindner, J; Sachdev, A; Schwank, J; Villa-Garcia, M ^[1]

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1. Univ. of Michigan, Ann Arbor (United States)

Oxygen pulse chemisorption measurements were made on a series of model HDS catalysts synthesized from solid-state reactions of elemental starting materials. Three different promoter atoms having the following catalyst stoichiometries were used in this study: P[sub 2x]Mo[sub 1[minus]x]S[sub 2] for the Co and Fe samples and P[sub x]Mo[sub 1[minus]x]S[sub 2] for the Ni series. Four samples from each promoter family were studied and the P/(P + Mo) weight percent ratio varied from 0.030 to 0.355. All catalysts displayed Arrhenius type behavior in the HDS of thiophene and it was found that O[sub 2] chemisorption uptakes could be correlated with the HDS activity of these solid-state model catalysts. Pulse chemisorption experiments revealed that the more active samples adsorbed increased amounts of O[sub 2]; hence activity normalizations using O[sub 2] uptake resulted in a consolidation of the Arrhenius plots so that the individual data points merged into a narrow band on the plot. Oxygen activity normalizations also revealed that on a per mole of O[sub 2] basis, the model catalysts gave thiophene HDS turnover frequencies similar to those found on an industrial HDS catalyst, CO chemisorption experiments were run on a select number of samples and similar trends were observed.

• OSTI ID: 6938920
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 135:2; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

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ADSORPTION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
COBALT COMPOUNDS
COBALT SULFIDES
DESULFURIZATION
ELEMENTS
HETEROCYCLIC COMPOUNDS
IRON COMPOUNDS
IRON SULFIDES
KINETICS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NICKEL COMPOUNDS
NICKEL SULFIDES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PROMOTERS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
STOICHIOMETRY
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
THIOPHENE
TRANSITION ELEMENT COMPOUNDS