The kinetics of hydrocarbon conversion on ZSM-5 zeolites |
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Authors: | M A Botavina N V Nekrasov and S L Kiperman |
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Institution: | (1) Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow, Russia |
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Abstract: | The complete oxidation of hydrocarbons with various structures (methane, n and wo-pentanes, cyclohexane, and benzene) on copper-modified
ZSM-5 zeolite and the aromatization of propane on H-ZSM-5, are studied to analyze diffusion effects on the reaction kinetics.
Comparison of the kinetic parameters of complete oxidation shows that the process rate and the rate law strongly depend on
the reactant structure. Apparently, n-pentane oxidation is controlled by kinetics; the kinetics for other hydrocarbons depends
on diffusion inside zeolite channels to different degrees. In the case of propane aromatization, its dehydrogenation and cracking,
as well as the formation of aromatics from olefins, occurs on different active sites. Propane conversion is supposed to occur
inside the zeolite channels, and the aromatization of olefins occurs on the outer surface of the zeolite crystal
Deceased. |
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Keywords: | |
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