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Contact catalytic conversions of C11-C18 n-alkanes under hydrogen pressure in a flow system

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Summary

  1. 1.

    An investigation has been made on the catalytic conversions of C11-C18 normal alkanes in the presence of 0.5% Pt-Al2O3, 0.5% Pd-Al2O3, 0.5% Pt-gumbrine, and 0.5% Pd-gumbrine, at 450‡ in a flow system under 30 atm hydrogen pressure.

  2. 2.

    The principal conversion of the indicated alkanes under these conditions is their isomerization, forming up to 62% isoalkanes, which leads to a 16–48.5‡ lowering of the freezing points of the liquid products obtained and to an increase of the heats of combustion on the average by 140 to 1240 kcal/kg.

  3. 3.

    The normal alkanes beginning with C16, in the presence of 0.5% Pt-gumbrine, undergo conversions with the formation not only of products of hydrogenolysis, isomerization, and partial hydrocracking, but also of polycyclization products. Thereby, the phenanthrene, benzanthracene, and chrysene systems are formed.

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Additional information

T. S. Shakarashvili took part in carrying out the experimental part of the work. The optical analysis was carried out by Yu. P. Egorov, for which the authors express great gratitude. The authors also thank A. N. Nikitina, who measured the luminescence spectrum.

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Bekauri, N.G., Shuikin, N.I. Contact catalytic conversions of C11-C18 n-alkanes under hydrogen pressure in a flow system. Russ Chem Bull 10, 286–291 (1961). https://doi.org/10.1007/BF00919568

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Keywords

  • Hydrogen
  • Combustion
  • Alkane
  • Phenanthrene
  • Flow System