Selectivity of molybdenum catalyst in hydrodesulfurization, hydrodenitrogenation, and hydrodeoxygenation: effect of additives on dibenzothiophene hydrodesulfurization
Kinetic studies of the hydrodesulfurization of dibenzothiophene on a presulfided molybdena-alumina catalyst were carried out in a high-pressure-flow microreactor. The mechanism discussed is based on selective poisoning studies, using various nitrogen, polyaromatic, sulfur, and oxygen compounds. The nitrogen compounds inhibited the hydrogenation of dibenzothiophene because they adsorbed more strongly than did dibenzothiophene at lower temperatures. At higher temperatures, the nitrogen compounds also hinder the desulfurization together with the hydrogenation of dibenzothiophene. The sulfur and the oxygen compounds retarded all reactions of the desulfurization of dibenzothiophene. The reactions of the desulfurization, the denitrogenation, and the deoxygenation proceed on one type of site and the hydrogenation reactions on another site. 10 figures.
- Research Organization:
- Tokyo Univ. of Agriculture and Technology, Japan
- OSTI ID:
- 5862774
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 81:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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ADDITIVES
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BIPHENYL
CARBON COMPOUNDS
CARBON SULFIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
CONDENSED AROMATICS
CYCLOALKANES
CYCLOALKENES
DATA
DESULFURIZATION
ELEMENTS
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
INFORMATION
INFRARED SPECTRA
KINETICS
MASS SPECTRA
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHENANTHRENE
PHENOL
PHENOLS
QUANTITY RATIO
REACTION KINETICS
SAMPLE PREPARATION
SEPARATION PROCESSES
SPECTRA
SULFIDATION
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YIELDS