Hydroprocessing of dibenzothiophene, phenothiazine, phenoxathiin, thianthrene, and thioxanthene on a sulfided NiO-MoO/sub 3//. gamma. -Al/sub 2/O/sub 3/ catalyst
The hydroprocessing of phenothiazine, phenoxathiin, thianthrene, and thioxanthene was studied by a batch method at 340/sup 0/C and 70 bar H/sub 2/ over a sulfided NiO-MoO/sub 3//..gamma..-Al/sub 2/O/sub 3/ catalyst. The hydrodesulfurization (HDS) rate constants are similar to one another and about tenfold higher than that of dibenzothiophene. The presence of a second heteroatom or a methylene group does not play an important role on the removal of sulfur. The differences of reactivity could rather result from geometrical considerations in relation with the ease of adsorption on the catalyst surface. The cleavage patterns and reaction networks for the hydroprocessing of compounds dibenzothiophene, phenothiazine, phenoxathiin, thianthrene, and thioxanthene are discussed. The product distribution allows, in particular, an estimate to be made of the rates of hydrogenation and hydrogenolysis in HDS, hydrodenitrogenation (HDN), and hydrodeoxygenation (HDO) processes.
- Research Organization:
- CNRS, Montpellier (France)
- OSTI ID:
- 5262469
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 97:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemical evidence for the existence of two types of catalytic sites for hydroprocessing of substituted benzenes over NiW(Mo)/. gamma. -1al sub 2 O sub 3
Novel catalysts for upgrading coal-derived liquids. Quarterly technical progress report, December 1, 1994--February 28, 1995
Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400 -- Petroleum-- Processing
04 OIL SHALES AND TAR SANDS
040404 -- Oil Shales & Tar Sands-- Purification
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AZINES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL LIQUIDS
DENITRIFICATION
DESULFURIZATION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROGENATION
KINETICS
LIQUIDS
MINERAL OILS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NICKEL COMPOUNDS
NICKEL OXIDES
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PHENOTHIAZINES
POLYCYCLIC SULFUR HETEROCYCLES
REACTION KINETICS
REDUCTION
REFRACTORY METAL COMPOUNDS
SHALE OIL
TRANSITION ELEMENT COMPOUNDS