Hydrocracking polycyclic hydrocarbons over a dual-functional zeolite (faujasite)-based catalyst

Journal Article · Fri Jul 01 00:00:00 EDT 1983 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200022a011· OSTI ID:5613993

Hynes, Jr, H W; Helmer, N E; Parcher, J F

Mixtures of two-, three-, and four-ring (naphthalene, phenanthrene, and pyrene) structures were hydrocracked over a nickel-tungsten sulfide ultrastable zeolite Y catalyst. The hydrocracking of tetralin and phenanthrene proceeds by elimination of butanes to form C/sub 6/ and C/sub 10/ hydrocarbons primarily. Isomerization of saturated six-member rings to methyl-substituted five-member rings is also prominent. The presence of 1-cyclohexyl-2-phenylethane in the products from phenanthrene hydrocracking suggests an alternative reaction path for the hydrocracking of structures containing adjacent saturated rings. Pyrene hydrocracking proceeds primarily by elimination of propane followed by butanes elimination, i.e., C/sub 16/ ..-->.. C/sub 13/ ..-->.. C/sub 10/ ..-->.. C/sub 6/. The C/sub 13/ intermediates are mostly hydrogenated phenalenes. The zeolite-based catalyst was very active in hydrocracking pyrene (critical diameter = 9 A) and smaller molecules. The perhydropyrene component of the feed mixture was relatively inert, but it could not be established whether this was due to a molecular sleve effect or intrinsic chemical kinetics factors.

• Research Organization: Chemical Engineering Department, University of Wyoming, Laramie, Wyoming 82071
• DOE Contract Number: AC22-77ET10651
• OSTI ID: 5613993
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 22:3; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORBENTS
ALKANES
ALKYL RADICALS
AROMATICS
BUTANE
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CONDENSED AROMATICS
CRACKING
DECOMPOSITION
DISPERSIONS
FAUJASITE
HYDROCARBONS
HYDROCRACKING
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
KINETICS
MATERIALS
METHYL RADICALS
MINERALS
MIXTURES
MOLECULAR SIEVES
NAPHTHALENE
NICKEL COMPOUNDS
ORGANIC COMPOUNDS
PHENANTHRENE
POLYCYCLIC AROMATIC HYDROCARBONS
PROPANE
PYRENE
PYROLYSIS
RADICALS
REACTION KINETICS
SILICATE MINERALS
SULFIDES
SULFUR COMPOUNDS
TETRALIN
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
ZEOLITES