A kinetic model for the hexane cracking reaction over H-ZSM-5

Journal Article · Tue Mar 01 00:00:00 EST 1994 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(94)90011-6· OSTI ID:7035025

Lukyanov, D B; Shtral, V I ^[1]; Khadzhiev, S N ^[2]

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1. Karpov Institute of Physical Chemistry, Moscow (Russian Federation)
2. Groznyi Petroleum Institute, (Russian Federation)

A kinetic model for the n-hexane cracking reaction over H-ZSM-5 has been developed. This model describes hydrocarbon transformations in the following reaction steps: protolytic cracking of n-hexane, hydrogen transfer between-hexane and light olefins, oligomerization, and cracking of olefins. The activation energy of the protolytic cracking steps is 75.6-152.4 kJ/mol, depending on the reaction products, and that of the hydrogen transfer steps is 4.1-8.9 kJ/mol, depending on the olefin involved in the reaction step. It is demonstrated that a considerable contribution from hydrogen transfer to n-hexane cracking manifests itself in the autocatalytic character for the reaction at 400[degrees]C. At 538[degrees]C (the temperature of the [alpha]-test) hydrogen transfer does not play an appreciable role in hexane cracking over H-ZSM-5 zeolites. 19 refs., 4 figs., 4 tabs.

• OSTI ID: 7035025
• Journal Information: Journal of Catalysis; (United States), Vol. 146:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
HEXANE
CRACKING
ZEOLITES
CATALYTIC EFFECTS
ACTIVATION ENERGY
ALKENES
CATALYSTS
CHEMICAL REACTION KINETICS
HETEROGENEOUS CATALYSIS
ALKANES
CATALYSIS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PYROLYSIS
REACTION KINETICS
SILICATE MINERALS
THERMOCHEMICAL PROCESSES
400201* - Chemical & Physicochemical Properties
020400 - Petroleum- Processing