Retained products from the reaction of benzene and toluene over H-ZSM5 zeolite

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(91)90214-O· OSTI ID:5716570

Anderson, J R ^[1]; Dong, Q N; Western, R J ^[2]; Chang, Y F ^[3]

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1. Monash Univ., Victoria (Australia) CSIRO, Victoria (Australia)
2. CSIRO, Victoria (Australia)
3. Monash Univ., Victoria (Australia)

Benzene or toluene react on H-ZSM5 zeolite in the absence of added oxygen at 593 K and 673 K to give retained residue which contains some anthracenes/(phenanthrenes) accompanied by biphenyls, diphenylmethanes, fluorines, alkanes/(olefins), alkylbenzenes, alkylnaphthalenes, and (at 673 K) some black insoluble carbonaceous polymer; it is inferred that the condensation reactions which have been identified as leading to fused-ring tricyclic aromatics form part of the pathway to this carbonaceous polymer. The retained aromatic components mostly carry methyl substituents. It is concluded that anthracenes/(phenanthrenes) are formed from benzene or toluene via biphenyls (the primary condensation product) and diphenylmethanes, the presence of methyl (or other alkyl) substituents being a necessary feature. This reaction may be a general one for the enlargement of fused, polycyclic, aromatic systems. In the presence of oxygen, the retained hydrocarbon products are generally similar to those formed without added oxygen although aromatic oxygenates are coproduced. Reaction pathways are discussed.

• OSTI ID: 5716570
• Journal Information: Journal of Catalysis; (USA), Vol. 127:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BENZENE
DEHYDROCYCLIZATION
TOLUENE
ZEOLITES
CATALYTIC EFFECTS
ALKANES
ALKENES
ANTHRACENE
BIPHENYL
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CONDENSED AROMATICS
FLUORENE
PHENANTHRENE
POLYMERS
ALKYLATED AROMATICS
AROMATICS
CHEMICAL REACTIONS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
REACTION KINETICS
020400* - Petroleum- Processing
400201 - Chemical & Physicochemical Properties