Abstract
The activity of palladium-containing catalysts based on functionalized carbon nanofibers prepared by an incipient wetness impregnation method in the dehydrogenation reaction of methylcyclohexane was investigated. Methylcyclohexane is considered as one of the most promising liquid hydrogen carriers. The dependence of the catalytic characteristics of the samples on the functionalization conditions of carbon nanofibers was studied. Using temperature-programmed desorption, it was shown that an increase in the treatment time of carbon nanofibers in concentrated nitric acid from 1 to 3 h increased the number of hydroxyl groups on their surface, and treatment for 6 h contributed to a rise in the concentration of carboxyl groups and their derivatives (esters and anhydrides). Additional calcination of the functionalized nanofibers in an inert atmosphere at 530°C yielded a sample containing predominantly hydroxyl groups. The presence of hydroxyl groups on the surface of the carbon material had a positive effect on the performance of the catalysts, while the presence of carboxyl groups led to a decrease in the yield of toluene. It was assumed that the observed differences in catalyst activity were due to differences in the dispersion and localization of palladium particles.
Similar content being viewed by others
REFERENCES
Sekine, Y. and Higo, T., Top. Catal., 2021, vol. 64, nos. 7–8, p. 470.
Radkevich, V.Z., Senko, T.L., Wilson, K., Grishenko, L.M., Zaderko, A.N., and Diyuk, V.Y., Appl. Catal. A: Gen., 2008, vol. 335, no. 2, p. 241.
Netskina, O.V., Komova, O.V., Tayban, E.S., Ozerova, G.V., Mukha, S.A., Kuvshinov, G.G., and Simagina, V.I., Appl. Catal. A: Gen., 2013, vol. 467, p. 386.
Mishakov, I.V., Afonnikova, S.D., Bauman, Y.I., Shubin, Y.V., Trenikhin, M.V., Serkova, A.N., Vedyagin, A.A., Kinet. Catal., 2022, vol. 63, no. 1, p. 97.
Silva, A.M., Machado, B.F., Figueired, J.L., and Faria, J.L., Carbon, 2009, vol. 47, no. 7, p. 1670.
Marin, M.A., Wyss, C., Muller, S., and Newson, E., Chem. Eng. Sci., 1996, vol. 51, no. 11, p. 2891.
Herz, R., Gillespie, W., Petersen, E., and Somorjai, G., J. Catal., 1981, vol. 67, p. 371.
Wang, J., Liu, H., Fan, S., Li, W., Li, Z., Yun, H., Xu, X., Guo, A., and Wang, Z., Energy Fuels, 2020, vol. 34, p. 16542.
Yao, Y., Yan, Z., Chen, L., Zhou, Z., Liu, L., and Goodman, D.W., Catal. Lett., 2012, vol. 142, p. 1437.
Meng, J., Zhou, F., Ma, H., Yuan, X., Wang, Y., and Zhang, J.A., Top. Catal., 2021, vol. 64, p. 509.
Funding
This work was supported by the Russian Science Foundation (project no. 22-13-00406, https://rscf.ru/en/project/22-13-00406, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors of this work declare that they have no conflicts of interest.
Additional information
Translated by V. Makhlyarchuk
Abbreviations and notation: CNFs, carbon nanofibers; TPD, temperature-programmed desorption; SBET, specific surface area; BET, Brunauer–Emmett–Teller method.
Rights and permissions
About this article
Cite this article
Veselov, G.B., Shivtsov, D.M., Afonnikova, S.D. et al. Palladium-Containing Catalysts Based on Functionalized Carbon Nanofibers for the Dehydrogenation of Methylcyclohexane. Kinet Catal 64, 925–927 (2023). https://doi.org/10.1134/S0023158423060174
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0023158423060174