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Dehydrogenation of isopropanol on a modified copper catalyst

  • Chemical Kinetics and Catalysis
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Abstract

The influence of plasmochemical treatments of the 5 wt % Cu/SiO2 catalyst and cerium additives on the activity of the catalyst in isopropanol dehydrogenation was studied. After the catalyst was treated with high-frequency plasma in H2 under the flow conditions, the conversion of alcohol increased. The reaction kinetics was studied under static conditions. The rate constant increased 1430-fold after the introduction of an optimum dose of Ce and treatment in Ar, O2, and H2 plasma and 550-fold after treatment with high-frequency plasma in H2. The experimental activation energy increased in all instances; the activity grew because of the increase in the number of active centers. The promoting action of cerium was explained by the positive charge of the Ce+α adatom, which initiated growth of the surface electron density; the influence of plasmochemical treatments was explained by the change in the number of structural defects and their character. Possible stepwise reaction schemes were considered based on ab initio quantum-chemical calculations.

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Authors and Affiliations

  1. Russian Peoples’ Friendship University, Moscow, Russia

    E. A. Platonov, N. A. Galimova, Z. V. Pskhu & V. D. Yagodovskii

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  1. E. A. Platonov
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  2. N. A. Galimova
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  3. Z. V. Pskhu
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  4. V. D. Yagodovskii
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Correspondence to V. D. Yagodovskii.

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Original Russian Text © E.A. Platonov, N.A. Galimova, Z.V. Pskhu, V.D. Yagodovskii, 2012, published in Zhurnal Fizicheskoi Khimii, 2012, Vol. 86, No. 2, pp. 262–266.

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Platonov, E.A., Galimova, N.A., Pskhu, Z.V. et al. Dehydrogenation of isopropanol on a modified copper catalyst. Russ. J. Phys. Chem. 86, 205–209 (2012). https://doi.org/10.1134/S0036024412020227

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  • DOI: https://doi.org/10.1134/S0036024412020227

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