Cracking of long-chain alkyl aromatics on USY zeolite catalysts

Journal Article · Fri May 01 04:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90267-L· OSTI ID:6938982

Corma, A ^[1]; Miguel, P J; Orchilles, A V ^[2]; Koermer, G S ^[3]

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1. Inst. Technologia Quimica, Valencia (Spain)
2. Univ. de Valencia (Spain)
3. Engelhard Corp., Iselin, NJ (United States)

Long-chain alkyl aromatics are important precursors for FCC gasoline. It is well known that for short-chain alkyl aromatics like cumene the dominant cracking process is simple alkyl aryl cleavage. In contrast the authors have found that for long-chain alkyl aromatics like 1-phenylheptane, cracking over in situ USY catalysts is much more complex. Cracking in a long alkyl side chain results in a carbenium ion that isomerizes easily and gives self-alkylation of the aromatic ring. Self-alkylation produces coke precursors and heavy gasoline aromatics. Product selectivities vary with zeolite unit cell size in ways that are rationalized on the basis of decreasing acid site density and zeolite adsorption properties.

• OSTI ID: 6938982
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 135:1; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKYLATED AROMATICS
AROMATICS
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CLEAVAGE
CRACKING
CRYSTAL STRUCTURE
CUMENE
DECOMPOSITION
FUELS
GASOLINE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
LIQUID FUELS
MATERIALS
MICROSTRUCTURE
MINERALS
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PYROLYSIS
REACTION KINETICS
SILICATE MINERALS
SYNTHESIS
THERMOCHEMICAL PROCESSES
YIELDS
ZEOLITES