Stable Cr-MFI Catalysts for the Nonoxidative Dehydrogenation of Ethane: Catalytic Performance and Nature of the Active Sites

Sudipta De, Samy Ould-Chikh, Antonio Aguilar, Jean-Louis Hazemann, Andrea Zitolo, Adrian Ramirez, Selvedin Telalovic, Jorge Gascon

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The nonoxidative catalytic dehydrogenation of ethane allows the production of ethylene at lower temperatures than those applied in steam crackers. This, however, requires stable catalysts that minimize coke production. Here, we report a single-component, promoter-free, low-loading, Cr-based catalyst exhibiting high activity, long-term stability, and improved regeneration properties for the direct dehydrogenation of ethane to ethylene. According to our detailed operando X-ray absorption spectroscopic analysis, the use of all-silica MFI zeolite as support promotes the stabilization of CrII(−O–Si≡)2 species with high coke resistance, even when the dehydrogenation is carried out under high ethane partial pressures (1.5 bar).
Original languageEnglish (US)
Pages (from-to)3988-3995
Number of pages8
JournalACS Catalysis
DOIs
StatePublished - Mar 16 2021

ASJC Scopus subject areas

  • Catalysis

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