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Product selectivity and qualitative reaction scheme for the dehydrogenation and hydrogenolysis of n-butane over supported ruthenium at high temperature

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Abstract

The dehydrogenation and hydrogenolysis of n-butane (n-C4) over a Ru−Al2O3 catalyst (0.849 w/w% Ru) have been studied at 490°C at different time factors. Some runs have also been made on pure γ-Al2O3 at 490°C and on Ru-black at temperatures between 100 and 490°C, feeding n-butane and hydrogen. The analysis of the selectivity vs. time factor allows to prove that the initial reactions taking place are n-C4 dehydrogenation to 1-butene and 2-butenes and skeletal isomerization to isobutane. The initial molar selectivity to the n-butenes reaches about 70%. A qualitative reaction scheme is proposed.

Abstract

Дегидрирование и гидрогенолиз н-бутана (и-C4) над катализатором Ru−Al2O3 (0,849 вес.% Ru) были изучены при температуре 490°C и при различных временах проведения реакции. Некоторые зксперименты были проведены на чистом γ-Al2O3 при 490°C и на Ru-черни в интервале температур 100–490°C с н-бутаном и водородом. Анализ зависимости селективности от временного фактора указывает на то, что начальной реакцией является дегидрирование н-C4 до 1-бутена и 2-бутена и скелетная изомеризация до изобутана. Исходная селективность к образованию н-бутенов достигает 80%. Предлагается качественный механизм реакции.

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Authors and Affiliations

  1. Istituto di Chimica-Fisica e Centro C.N.R., Universitá di Milano, Via Golgi, 19, 20133, Milano, Italy

    V. Ragaini & M. Navarra

  2. Istituto di Chimica Industriale, Universitá di Messina, Messina, Italy

    A. Spadaro & N. Giordano

Authors
  1. V. Ragaini
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  2. M. Navarra
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  3. A. Spadaro
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  4. N. Giordano
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Ragaini, V., Navarra, M., Spadaro, A. et al. Product selectivity and qualitative reaction scheme for the dehydrogenation and hydrogenolysis of n-butane over supported ruthenium at high temperature. React Kinet Catal Lett 2, 19–27 (1975). https://doi.org/10.1007/BF02060948

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  • DOI: https://doi.org/10.1007/BF02060948

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