The effect of an acidic catalyst on simultaneous hydrodesulfurization and hydrodenitrogenation of heterocyclic sulfur and nitrogen (thiophene and pyridine)

Journal Article · Fri Jan 01 00:00:00 EST 1982 · AIChE Symp. Ser.; (United States)

OSTI ID:5474074

Moore, H J; Tyler, A L

The hydrodesulfurization (HDS) of thiophene and the hydrodenitrogenation (HDN) of pyridine over metal sulfides on acidic catalyst supports was studied in this research. Four sulfided catalysts were considered; CoMo-SiO/sub 2//Al/sub 2/O/sub 3/, CoMo-Al/sub 2/O/sub 3/, NiW-SiO/sub 2//Al/sub 2/O/sub 3/, and NiW-Al/sub 2/O/sub 3/. These catalysts were chosen in an effort to isolate the effect of the metallic sulfide (CoMo or NiW) and the effect of the acidic support (SiO/sub 2//Al/sub 2/O/sub 3/ or Al/sub 2/O/sub 3/). Reaction conditions of 200 to 400/sup 0/C and .27 to 1.4 M Pa were used. No consistent effect of the metal sulfide (Ni-W vs. CoMo) was observed, but the more acidic silica-alumina support was the more effective support for the HDN of pure pyridine. Alumina was a more effective support for the HDS of pure thiophene and for the HDS of thiophene and the HDN of pyridine in mixed feeds. A two-site reaction mechanism, based on the Langmuir adsorption isotherm, was used to model the HDS of thiophene, but a single site analysis described the reaction of pyridine. Values of activation energies are calculated for HDS of thiophene and HDN of pyridine from pure feeds and from 50/50 mixtures of thiophene.

• Research Organization: Department of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112
• OSTI ID: 5474074
• Journal Information: AIChE Symp. Ser.; (United States), Vol. 78:216
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM OXIDES
CATALYTIC EFFECTS
ALUMINIUM SILICATES
CATALYST SUPPORTS
COMPARATIVE EVALUATIONS
CATALYSTS
COBALT
MOLYBDENUM
NICKEL
PYRIDINE
DENITRIFICATION
HYDROGENATION
THIOPHENE
DESULFURIZATION
TUNGSTEN
ACTIVATION ENERGY
ADSORPTION ISOTHERMS
CHEMICAL REACTION KINETICS
MIXTURES
PH VALUE
SULFIDES
ALUMINIUM COMPOUNDS
AZINES
CHALCOGENIDES
CHEMICAL REACTIONS
DISPERSIONS
ELEMENTS
ENERGY
HETEROCYCLIC COMPOUNDS
ISOTHERM
KINETICS
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRIDINES
REACTION KINETICS
SILICATES
SILICON COMPOUNDS
SULFUR COMPOUNDS
TRANSITION ELEMENTS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
400201 - Chemical & Physicochemical Properties