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

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).

Citation
De, S., Ould-Chikh, S., Aguilar, A., Hazemann, J.-L., Zitolo, A., Ramirez, A., … Gascon, J. (2021). Stable Cr-MFI Catalysts for the Nonoxidative Dehydrogenation of Ethane: Catalytic Performance and Nature of the Active Sites. ACS Catalysis, 3988–3995. doi:10.1021/acscatal.0c05170

Publisher
American Chemical Society (ACS)

Journal
ACS Catalysis

DOI
10.1021/acscatal.0c05170

Additional Links
https://pubs.acs.org/doi/10.1021/acscatal.0c05170

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