Catalytic hydrotreatment studies with model compounds. Quarterly report, July 1-September 30, 1986
Technical Report
·
OSTI ID:5070158
The hydrodeoxygenation of dibenzofuran (DBF) on a sulfided NiMo/Al/sub 2/O/sub 3/ catalyst in the presence of H/sub 2/S at 350 to 390/sup 0/C is proportional to the partial pressures of hydrogen and DBF. The apparent activation energy is 67 kJ/mol. At 375/sup 0/C and 7.0 MPa the major products isolated are single-ring hydrocarbons, cyclohexane predominating; of double-ring products, cyclohexylbenzene predominates. No oxygen-containing species other than water were isolated in any significant amount: the first reactions in the hydrodeoxygenation of DBF are the rate-limiting steps. The non-sulfided catalyst in the presence of hydrogen is much less active and C/sub 12/ ring products predominate over single ring products. From studies of possible intermediates it appears that on a sulfided catalyst two pathways operate in parallel for the hydrodeoxygenation of dibenzofuran: (1) hydrogenation of DBF to hexahydro DBF, which then forms 2-cyclohexylphenol which then reacts to form single ring hydrocarbons; and (2) direct hydrogenolysis through 2-phenylphenol without prior ring hydrogenation to form biphenyl and cyclohexylbenzene (a minor route). 24 refs., 25 figs., 6 tabs.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- FG22-83PC60798
- OSTI ID:
- 5070158
- Report Number(s):
- DOE/PC/60798-12; ON: DE87000295
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010403* -- Coal & Coal Products-- Hydrogenation-- (-1987)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
BENZOFURANS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
FURANS
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROGEN
HYDROGENATION
INFORMATION
KINETICS
MEDIUM PRESSURE
METALS
MOLYBDENUM
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PARTIAL PRESSURE
REACTION INTERMEDIATES
REACTION KINETICS
RESEARCH PROGRAMS
STRUCTURAL MODELS
SULFIDATION
TRANSITION ELEMENTS
010403* -- Coal & Coal Products-- Hydrogenation-- (-1987)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
BENZOFURANS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
FURANS
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROGEN
HYDROGENATION
INFORMATION
KINETICS
MEDIUM PRESSURE
METALS
MOLYBDENUM
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PARTIAL PRESSURE
REACTION INTERMEDIATES
REACTION KINETICS
RESEARCH PROGRAMS
STRUCTURAL MODELS
SULFIDATION
TRANSITION ELEMENTS