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Elucidation of the Effect of TiO2 in the Synthesized Nanocatalyst of Co–Mo@Al2O3–TiO2 for the Hydrogenation of C6–C8 Olefins

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Abstract

The development of bimetallic sites on supported catalysts has enhanced catalytic performance compared to the corresponding monometallic sites. To determine the impact of TiO2 addition on the development of the active phase on CoMo/Al2O3 catalyst in the hydrogenation of Pyrolysis Gasoline (PyGas), a range of CoMo catalysts supported on different Al2O3 supports were created. The relevant operating parameters were utilized in a fixed bed reactor to assess how the TiO2 loading component affected the activity of such systems: T = 270–390 °C, P = 25 bar, WHSV = 4 h−1, H2: HC molar ratio = 10. The catalytic activity and selectivity of the catalysts were connected to their physical characteristics, which were examined using various characterization methods (N2 adsorption–desorption isotherms, FESEM, XRD, TPR, NH3-TPD, and FTIR spectroscopy). The XRD outcomes indicate that the Ti-containing supported catalysts appeared as anatase TiO2 species. TiO2 may alter the support and active metal interaction, enhancing molybdenum’s reducibility. The alteration of the electrical characteristics of tetrahedral and octahedral molybdenum species by titania seems to have been discovered to improve the surface acidity while simultaneously enhancing their reductive behavior. Moreover, the CoMo/Al2O3–TiO2 with a titania concentration of 5 wt% may effectively eliminate over 96% of Styrene molecules in PyGas.

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Acknowledgements

This research was supported by Nouri Petrochemical Company and we sincerely thank our colleagues from Research and Development Department who provided insight and expertise that greatly assisted the research.

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Authors and Affiliations

  1. Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

    Mohammad Reza Parvizi & Mehdi Ardjmand

  2. Nanotechnology Research Center, South Tehran Branch, Islamic Azad University, Tehran, Iran

    Mehdi Ardjmand

  3. Surface Reaction and Advanced Energy Materials Laboratory, Chemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran

    Sajjad Habibzadeh

  4. Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC, H3A 0C5, Canada

    Sajjad Habibzadeh

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  1. Mohammad Reza Parvizi
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Correspondence to Mehdi Ardjmand.

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Parvizi, M.R., Ardjmand, M. & Habibzadeh, S. Elucidation of the Effect of TiO2 in the Synthesized Nanocatalyst of Co–Mo@Al2O3–TiO2 for the Hydrogenation of C6–C8 Olefins. Catal Lett 154, 2328–2339 (2024). https://doi.org/10.1007/s10562-023-04475-z

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