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Coconversion of n-Dodecane and 2-Methylthiophene in the Presence of Dual-Zeolite Cracking Catalysts Containing Different Amounts of Rare-Earth Elements

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Abstract

The effect of the rare-earth element (REE) content in dual-zeolite cracking catalysts on the conversion of n-dodecane and an n-dodecane–2-methylthiophene mixture (5000 ppm S) has been studied. The catalysts have been synthesized using zeolites Y and ZSM-5 modified with REEs and phosphorus, respectively, as the active component. It has been shown that the presence of REE oxides in zeolite Y (at a constant SiO2/Al2O3 ratio) affects the catalytic activity of cracking catalysts based on this zeolite. The dependence of the light olefin yield on the REE oxide content in zeolite Y passes through a maximum at 2–3 wt %. The presence of a sulfur compound in an amount of 5000 ppm (in terms of sulfur) in the feedstock leads to a decrease in the model hydrocarbon conversion and the C2–C4 olefin yield. In the presence of a sulfur compound, the change in the C2–C4 olefin yield as a function of REE oxide content in zeolite Y is less pronounced than that in the case of individual n-dodecane cracking.

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ACKNOWLEDGMENTS

The authors thank T.I. Gulyaeva, V.P. Talzi, S.N. Evdokimov, G.G. Savel’eva, A.V. Babenko, and R.R. Izmailov (Laboratory of analytical and physicochemical research methods, Center of New Chemical Technologies, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences). This work was performed using the equipment of the Shared-Use Center “National Center for Catalyst Research” at the Boreskov Institute of Catalysis (Siberian Branch of the Russian Academy of Sciences).

Funding

This work was performed with a financial support for applied research from the Ministry of Education and Science of the Russian Federation, agreement no. 05.607.21.0309 (project unique identifier RFMEFI60719X0309).

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Authors and Affiliations

  1. Center for New Chemical Technologies, Omsk Branch, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 644040, Omsk, Russia

    K. S. Plekhova, A. S. Yurtaeva, O. V. Potapenko, T. P. Sorokina & V. P. Doronin

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  1. K. S. Plekhova
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  2. A. S. Yurtaeva
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  3. O. V. Potapenko
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  4. T. P. Sorokina
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  5. V. P. Doronin
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Corresponding author

Correspondence to O. V. Potapenko.

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Translated by M. Timoshinina

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Plekhova, K.S., Yurtaeva, A.S., Potapenko, O.V. et al. Coconversion of n-Dodecane and 2-Methylthiophene in the Presence of Dual-Zeolite Cracking Catalysts Containing Different Amounts of Rare-Earth Elements. Pet. Chem. 60, 923–928 (2020). https://doi.org/10.1134/S0965544120080113

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  • DOI: https://doi.org/10.1134/S0965544120080113

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