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Isomerization of C5–C7 paraffins over a Pt/WO3–ZrO2 catalyst using industrial feedstock

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Abstract

Much research has been published on the isomerization of C5–C7 paraffins using Pt/WO3–ZrO2 (PtWZr) catalysts. However, to our knowledge, most of these researchers only used model feedstocks. Therefore, we tested the activity of a Pt/WO3–ZrO2 catalyst using real raw materials (a mixture of n-hexane + i-hexanes or an industrial feedstock) for the industrial production of high-quality gasoline. A reliable method was developed to study the activity of a PtWZr sample with w(WO3) = 12 % and w(Pt) = 0.25 %. The catalyst was tested in a continuous flow reactor connected to a gas chromatograph and two sample collectors. Tests were carried out under different conditions to optimize the reaction at 250 and 300 °C. The results were analyzed to determine the product composition and to calculate the final equivalent research octane number. While a high conversion rate was achieved using the model reactant, the yield decreased significantly when more real raw materials were used. Therefore, our results suggest that real feedstock should be used to determine whether a catalyst has sufficient activity for the isomerization of C5–C7 paraffins in industrial applications.

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Acknowledgments

This publication is a result of project no. FR-TI3/316, supported by the Ministry of Industry and Trade of the Czech Republic, which is being carried out at the UniCRE Centre, whose infrastructure is supported by the European Regional Development Fund and the state budget of the Czech Republic.

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Authors and Affiliations

  1. Department of Efficient Refining Technologies (UniCRE-EFFRET), Research Institute of Inorganic Chemistry (VUAnCh), Chempark Litvínov, 43670, Litvínov, Czech Republic

    José M. Hidalgo & Radek Černý

  2. J. Heyrovsky Institute of Physical Chemistry of the ASCR, v. v. i., Dolejškova 2155/3, 182 23, Prague 8, Czech Republic

    Dalibor Kaucký & Zdeněk Sobalík

  3. Euro Support Manufacturing Czechia, s.r.o., Záluží 1, 436 70, Litvínov, Czech Republic

    Oleg Bortnovsky

Authors
  1. José M. Hidalgo
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  2. Dalibor Kaucký
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  3. Oleg Bortnovsky
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  4. Radek Černý
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  5. Zdeněk Sobalík
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Correspondence to José M. Hidalgo.

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Hidalgo, J.M., Kaucký, D., Bortnovsky, O. et al. Isomerization of C5–C7 paraffins over a Pt/WO3–ZrO2 catalyst using industrial feedstock. Monatsh Chem 145, 1407–1416 (2014). https://doi.org/10.1007/s00706-014-1231-8

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  • DOI: https://doi.org/10.1007/s00706-014-1231-8

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