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Production of High-Octane Gasolines from Bioethanol on Zn-Modified HZSM-5 Zeolite

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Moscow University Chemistry Bulletin Aims and scope

Abstract

The influence of the concentration of zinc introduced into HZSM-5 on its acidic and catalytic properties in the conversion of ethanol into high-octane components of motor fuels in the temperature range of 350 to 450°C is studied. Based on the IR spectroscopy data, it is shown that an increase in the zinc content in the zeolite from 1.0 to 3.0 wt % leads to a redistribution of the acid sites, i.e., to a decrease in the concentration of strong Brønsted acid sites (B) and an increase in the concentration of medium strength Lewis ones (L) (a decrease in the B/L ratio from 3.53 to 0.44). All this has a decisive influence on the isomerizing and aromatizing selectivity of the catalyst. The maximum selectivity for isoparaffins (43.9%) has been achieved on the zeolite containing 2.0 wt % of zinc and a B/L ratio of 0.66. The catalyst obtained at 300–350°C corresponds to the Euro-5 standard in terms of the content of benzene (<1.0 wt %), aromatic (<30.0 wt %), and olefinic (<2.0 wt %) compounds.

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Funding

This study was supported by the Ministry of Education of the Republic of Azerbaijan.

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Authors and Affiliations

  1. Branch of Moscow State University, AZ1144, Baku, Azerbaijan

    E. S. Mamedov & B. A. Babaeva

  2. Baku State University, AZ1148, Baku, Azerbaijan

    S. E. Mamedov, N. F. Akhmedova & F. S. Kerimli

Authors
  1. E. S. Mamedov
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  2. B. A. Babaeva
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  3. S. E. Mamedov
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  4. N. F. Akhmedova
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  5. F. S. Kerimli
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Each author made an equivalent contribution to the preparation of the publication.

Corresponding author

Correspondence to N. F. Akhmedova.

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The authors declare that they have no conflicts of interest.

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Translated by E. Domoroshchina

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Mamedov, E.S., Babaeva, B.A., Mamedov, S.E. et al. Production of High-Octane Gasolines from Bioethanol on Zn-Modified HZSM-5 Zeolite. Moscow Univ. Chem. Bull. 77, 222–229 (2022). https://doi.org/10.3103/S002713142204006X

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  • DOI: https://doi.org/10.3103/S002713142204006X

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