Effect of hydrogen and supported metal on selectivity and on-stream stability of ZrO2-based catalysts in non-oxidative propane dehydrogenation

Tatiana Otroshchenko,Evgenii V Kondratenko

doi:10.1016/j.catcom.2020.106068

Tatiana Otroshchenko, Evgenii V Kondratenko

Open Access

https://doi.org/10.1016/j.catcom.2020.106068

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Journal: Catalysis Communications	Publication Date: Jun 2, 2020
Citations: 9	License type: cc-by-nc-nd

Affiliation: Leibniz Institute for Catalysis

Abstract

We elucidated the effects of H2 and the kind (Cu or Ru) of supported metal on product selectivity and on-stream stability of MZrOx-based catalysts (M = La or Y) in the non-oxidative dehydrogenation of propane to propene. Coke formation was hindered in hydrogen presence. However, the selectivity to C1-C2 hydrocarbons increased over Ru/MZrOx but did not change over Cu/LaZrOx. This difference was related to the low activity of Cu for cracking and hydrogenolysis reactions. Using feed with 40 vol% C3H8 and 30 vol% H2 in N2, Cu/LaZrOx showed stable conversion (20%) and propene selectivity (88%) within 4.5 h on stream at 550 °C.

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