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

Evgeny A. Uslamin, H. Saito, Y. Sekine (Corresponding author), Emiel J.M. Hensen (Corresponding author), Nikolay A. Kosinov (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (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
VolumeXX
Issue numberX
DOIs
Publication statusAccepted/In press - 13 Apr 2020

Keywords

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

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