SELECTIVE DEHYDROGENATION OF METHYLCYCLOHEXANE USING TIN-MODIFIED HIGH-LOADED NICKEL CATALYSTS

17th International Conference on Fundamental and Applied Aspects of Physical Chemistry (Proceedings, Volume I) (2024) [C-02-O, pp. 61-64]

AUTHOR(S) / AUTOR(I): S.A. Stepanenko , A.P. Koskin  and V.A. Yakovlev

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DOI: 10.46793/Phys.Chem24I.061S

ABSTRACT / SAŽETAK:

High-loaded nickel catalysts (HLNC) modified with tin were synthesized and evaluated for the dehydrogenation of methylcyclohexane (MCH), which serves as a liquid organic hydrogen carrier. By optimizing the catalyst composition and reduction temperature, a dehydrogenation selectivity of >99.0% was achieved at a MCH conversion rate of 92% and a WHSV of 6.0 h¹. The stability of the Sn-modified HLNC was confirmed through a long-term (100-hour) catalyst test. The genesis of the HLNC during Sn modification and reductive activation in hydrogen was investigated. It was found that activation at temperatures above 450°C resulted in a uniform distribution of Sn, primarily forming solid NiSn solutions with a crystal lattice similar to metallic nickel. The formation of these solid solutions decreased the adsorptive properties related to the reaction product, toluene, which consequently enhanced the selectivity of MCH dehydrogenation.

KEYWORDS / KLJUČNE REČI:

ACKNOWLEDGEMENT / PROJEKAT:

This work was supported by the Ministry of Science and Higher Education of the Russian Federation within governmental order for Boreskov Institute of Catalysis SB RAS (projects FWUR- 2024-0038, FWUR-2024-0043).

REFERENCES / LITERATURA:

  • A. Lin, G. Bagnato, Int. J. Hydrogen Energy. 63 (2024) 315–329.
  • Y. Gulyaeva, M. Alekseeva, O. Bulavchenko, A. Kremneva, A. Saraev, E. Gerasimov, S. Selishcheva, V. Kaichev, V. Yakovlev, Nanomaterials. 11 (2021).
  • M.V. Alekseeva (Bykova), Y.K. Gulyaeva, O.A. Bulavchenko, A.A. Saraev, A.M. Kremneva, S.A. Stepanenko, A.P. Koskin, V. V. Kaichev, V.A. Yakovlev. Dalt. Trans. 51 (2022) 6068– 6085.
  • A.H. Al-Shaikhali, A. Jedidi, L. Cavallo, K. Takanabe. Chem. Commun. 51 (2015) 12931– 12934.
  • A.P. Koskin, S.A. Stepanenko, O.A. Alekseeva (Bykova), M.V. Bulavchenko, E.Y. Gerasimov, A.I. Lysikov, P.M. Yeletsky, V.V. Kaichev, V.A. Yakovlev. Chem. Eng. J. 476 (2023).
  • M.A. Ermakova, D.Y. Ermakov. Appl. Catal. A Gen. 245 (2003) 277–288.