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Efficient and selective hydrogenation of benzonitrile to benzylamine: improvement on catalytic performance and stability in a trickle-bed reactor

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Abstract

An efficient and selective hydrogenation of benzonitrile to benzylamine has been accomplished over a Pd/γ-Al2O3 catalyst, without any additives, in a trickle-bed reactor. Some unique features involving both a gas–liquid phase reaction and a gas phase reaction were found for the hydrogenation of benzonitrile, due to the application of the trickle-bed reactor. A comparison of the catalytic performances clearly showed that there was more excellent mass transmission and more substantial back-mixing restriction in the trickle-bed reactor than in the batch reactor. As a result, Pd/γ-Al2O3 exhibited a higher activity and benzylamine selectivity for the hydrogenation of benzonitrile, generating benzylamine in a yield of ∼86%. Furthermore, a long-term stability test of up to 120 h was conducted on Pd/γ-Al2O3 for the hydrogenation of benzonitrile, with no significant loss of activity, exhibiting its potential in industrial application.

Graphical abstract: Efficient and selective hydrogenation of benzonitrile to benzylamine: improvement on catalytic performance and stability in a trickle-bed reactor

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Publication details

The article was received on 01 Jan 2017, accepted on 28 Mar 2017 and first published on 29 Mar 2017


Article type: Paper
DOI: 10.1039/C7NJ00001D
Citation: New J. Chem., 2017, Advance Article
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    Efficient and selective hydrogenation of benzonitrile to benzylamine: improvement on catalytic performance and stability in a trickle-bed reactor

    C. Dai, S. Zhu, X. Wang, C. Zhang, W. Zhang, Y. Li and C. Ning, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ00001D

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