Catalytic hydrodesulfurization of dibenzothiophene and a coal-derived liquid

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200032a036· OSTI ID:5874769

O'Brien, W S; Chen, J W; Nayak, R V; Carr, G S

The catalytic hydrodesulfurization (HDS) reactions of both specific organosulfur compounds and a coal-derived liquid were studied in a continuous, back-mixed, internally circulated (gradientless) laboratory reactor using a commercial cobalt-molybdenum on alumina catalyst. The HDS of dibenzothiophene yielded experimental reaction rates that were adequately correlated by a Langmuir-Hinshelwood relationship. The computed activation energy and heats of adsorption computed compare quite well with values reported in the literature. The HDS of other thiophenic compounds demonstrated the effects that different alkyl substituents located on the thiophene ring would have on the sulfur-removal reactivity of these compounds relative to the HDS reactivity of dibenzothiophene. Coal-derived liquids were prepared by the batchwise solvent extraction and hydrogenation of a Herrin (IL) No. 6 coal with tetrain, toluene, and hydrogen. The coal was then catalytically hydrotreated by the same HDS procedure. The HDS rates measured were very adequately represented by a kinetic model that was first-order with respect to the total sulfur concentration and first-order with respect to hydrogen pressure. The value of the activation energy of the HDS pseudoreaction rate constant also compares quite well with those reported in literature, in spite of differences in catalysts, reactor designs, and feed coal liquid origins and compositions.

• Research Organization: Dept. of Mechanical Eng. and Energy Processes, Southern Illinois Univ. at Carbondale, Carbondale, IL 62901
• OSTI ID: 5874769
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 25:1; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
ACTIVATION ENERGY
ADSORPTION HEAT
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL LIQUIDS
COBALT COMPOUNDS
DESULFURIZATION
ELEMENTS
ENERGY
ENTHALPY
EXTRACTION
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDROGENATION
KINETICS
LIQUIDS
MOLYBDENUM COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
SULFUR
THERMODYNAMIC PROPERTIES
THIONAPHTHENES
TRANSITION ELEMENT COMPOUNDS