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Synthesis, Characterization and Catalytic Activity in the Hydrogenation of Cyclohexene with Molybdenum Carbide

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Abstract

Two series of molybdenum carbides are prepared from MoO3 by temperature programmed reduction (TPR), differing in feed gas composition (20 and 40% CH4/H2). The heating ramp consists of two steps, one from ambient temperature to 973 K, at a rate of 10 K/min; the second from 973 K up to the final temperature (1023, 1073, 1123, 1173 K), at a rate of 0.5 K/min. The Mo2C (hcp) phase is identified for the series prepared with 20% CH4/H2 at different temperatures, with surface areas between 20 and 27 m2/g. Also found is a mix of the MoC and Mo2C (hcp) phases for the series prepared with 40% CH4/H2 at temperatures above 1023 K, with surface areas between 9 and 19 m2/g. Both series of catalysts reach 100% conversion of cyclohexene in 5 h or less, with those catalysts prepared with a 40% CH4/H2 gas mix reaching maximum conversion in the least time. Catalysts are compared to a commercial molybdenum carbide reagent as a reference.

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Acknowledgments

We are very grateful to Eloisa Aparicio for technical assistance in the X-ray laboratory. Also to Dr. C. Márquez-Alvarez of the Instituto de Catálisis y Petroleoquímica, CSIC, Madrid, Spain, for fruitful discussions.

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Authors and Affiliations

  1. Facultad de Ciencias Químicas e Ingeniería de la UABC, Tijuana, BC, Mexico

    Espinoza-Monjardín, J. Cruz-Reyes & M. Del Valle-Granados

  2. Centro de Ciencias de la Materia Condensada de la UNAM, Ensenada, BC, Mexico

    E. Flores-Aquino, M. Avalos-Borja & S. Fuentes-Moyado

Authors
  1. Espinoza-Monjardín
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  2. J. Cruz-Reyes
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  3. M. Del Valle-Granados
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  4. E. Flores-Aquino
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  5. M. Avalos-Borja
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  6. S. Fuentes-Moyado
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Correspondence to J. Cruz-Reyes.

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Espinoza-Monjardín, Cruz-Reyes, J., Del Valle-Granados, M. et al. Synthesis, Characterization and Catalytic Activity in the Hydrogenation of Cyclohexene with Molybdenum Carbide. Catal Lett 120, 137–142 (2008). https://doi.org/10.1007/s10562-007-9264-9

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  • DOI: https://doi.org/10.1007/s10562-007-9264-9

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