Different mechanisms of ethane aromatization over Mo/ZSM-5 and Ga/ZSM-5 catalysts

Evgeny A. Uslamin, Hikaru Saito, Yasushi Sekine, Emiel J.M. Hensen, Nikolay Kosinov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Aromatization of light hydrocarbons can contribute to a secure supply of aromatics for the chemical industry. In this work, we investigate the influence of modification of zeolite ZSM-5 with Ga and Mo on the reaction mechanism underlying the activation and aromatization of ethane. Well-defined Mo/ZSM-5 and Ga/ZSM-5 zeolites efficiently promote ethane aromatization to benzene-toluene-xylene mixtures. Both catalysts suffer from coke formation, which leads to rapid deactivation. From catalytic tests, temperature-programmed surface reaction and pulsed reaction experiments, we infer that ethane conversion on Ga/ZSM-5 follows a conventional sequential dehydrogenation-oligomerization-aromatization mechanism, while the reaction over Mo/ZSM-5 involves reactive surface carbon (hydrocarbon pool) species.

Original languageEnglish
JournalCatalysis Today
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • Aromatics
  • Ethane
  • Ga/ZSM-5
  • Mechanism
  • Mo/ZSM-5

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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