The conversion of model coal liquids compounds to naphtha species. Final report 1 Jan 73--31 Oct 76
Four catalysts were tested in a laboratory trickle bed reactor for their activities and selectivities in hydrocracking phenanthrene. All the hydrogenation products of phenanthrene, including high yields of perhydrophenanthrene, were observed in the products from experiments with alumina supported cobalt molybdenum sulfide. In contrast the hydrogenation over chromia-alumina was terminated at sym-octahydrophenanthrene. Hydrogenolysis reactions were also observed over these catalysts. The tendency was to successively hydrogenate and crack at terminal rings though some evidence of a minor reaction path involving saturation and cracking at the central ring was observed with chromia-alumina. A nickel-tungsten sulfide/fluorided alumina catalyst and a palladium loaded rare earth hydrogen Y zeolite catalyst were very active hydrocracking catalysts. The zeolite catalyst was extremely active and a pore diffusion limitation was evident. Approximate calculations indicated that the pore diffusion limitation was likely due to diffusion within the macropore structure rather than the intracrystalline diffusivity. In addition to these experiments the supported Group VIII transition metals (excepts Os) and a commercial zeolite cracking catalyst were investigated in a pulse catalytic microreactor using a variety of hydrocarbon reactants. In all cases naphthalene derivatives were the most prominent cracked products obtained from cracking various partially hydrogenated phenanthrenes. (Portions of this document are not fully legible)
- Research Organization:
- Mississippi Univ., University (USA). Dept. of Chemical Engineering
- OSTI ID:
- 6992156
- Report Number(s):
- PB-275891
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010406* -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUIDS
COBALT COMPOUNDS
COBALT SULFIDES
CONDENSED AROMATICS
CRACKING
DECOMPOSITION
HYDROCARBONS
HYDROCRACKING
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MINERALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NICKEL COMPOUNDS
NICKEL SULFIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PHENANTHRENE
PYROLYSIS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN SULFIDES
ZEOLITES