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Deactivation of reforming catalysts. Coke formation on metallic and acidic centers

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Abstract

To check coke formation on metallic (Pto) and acidic (Al3+) centers of Pt/Al2O3 and Pt−Sn/Al2O3 catalysts, the application of IR spectroscopy of adsorbed CO for detecting Pto−CO (2070 cm−1) and Al3+−CO (2190 cm−1) bonds has been substantiated. Decrease in the number of active Pto and Al3+ centers is shown to correlate with that in the dehydrogenation rate of cyclohexane and in the isomerization rate of heptane, respectively.

Abstract

Для контроля закоксования металлических (Pto) и кислотных (Al3+) центров катализаторов Pt/Al2O3 и Pt−Sn/Al2O3 обосновано использование ИК-спектроскопии адсорбированного CO с детектированием связей Pto−CO (2070 см−1) и Al3+−CO (2190 см−1). Показано, что снижение числа активных центров Pto коррелирует с уменьшением скорости дегидрирования циклогексана, а Al3+-изомеризации гептана.

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Authors and Affiliations

  1. Omsk Department of Institute of Catalysis, Omsk, USSR

    N. M. Ostrovskii, E. M. Chalganov, Yu. K. Demanov, Yu. N. Kolomytsev & O. B. Bogomolova

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  1. N. M. Ostrovskii
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  2. E. M. Chalganov
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  3. Yu. K. Demanov
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  4. Yu. N. Kolomytsev
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  5. O. B. Bogomolova
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Ostrovskii, N.M., Chalganov, E.M., Demanov, Y.K. et al. Deactivation of reforming catalysts. Coke formation on metallic and acidic centers. React Kinet Catal Lett 41, 277–282 (1990). https://doi.org/10.1007/BF02097881

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  • DOI: https://doi.org/10.1007/BF02097881

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