Surface Reaction in Hydrogenolysis of Butylamines

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Bibliographic Information

Other Title
  • ブチルアミン水素化分解の表面反応
  • 窒素化合物の水素化分解　ＩＩ　　ブチルアミン水素化分解の表面反応

Description

In order to confirm the reaction scheme proposed in Part I and to obtain some information on the surface reaction mechanism, we studied the hydrogenolysis of butylamine isomers (n-, s-, i- and t-), dibutylamine and butyronitrile on a Co-Mo-A120, catalyst with the pulse reaction technique. The surface reaction rate constants for and the contents of hydrocarbons produced in the hydrogenolysis of butylamine, dibutylamine and butyronitrile were in good agreement with each other, as shown in Fig.4 and Table 1. While the rate constants of butylamine isomers differed, from each other as shown in Fig.5. The activation energy of tbutylamine (30 kcal/mol) was larger than the activation energies of the others (18 kcal/mol for s-butylamine and 23 kcal/mol for butylamine and isobutylamine). The ratio between the products, butene and butane, and the number of active sites on the catalyst in the hydrogenolysis of t-butylamine also were larger than those in the hydrogenolysis of the other amines as shown in Figs.6 and 7. This suggests that butylamine, dibutylamine and butyronitrile adsorb on the catalyst surface to form an identical adsorbed species which hydrogenate and that the adsorbed species of these three compounds and iso- and s-butylamines form amines diadsorbed at nitrogen and cr-carbon atoms, but adsorbed t-butylamine forms a monoadsorbed amine. Furthermore, the mechanism of conversion from adsorbed amines to hydrocarbon on the catalyst surface was proposed on the basis of the analysis of the surface reaction rate constants calculated from the activated complex theory.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1977 (11), 1597-1602, 1977-11-10

    The Chemical Society of Japan

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