Journal Article

PUBDB-2024-01186

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The enhancing effect of Co$^{2+}$ on propane non-oxidative dehydrogenation over supported Co/ZrO$_2$ catalysts

Zhang, Q.Extern* ; Li, Y. ; Otroshchenko, T. ; Kondratenko, V. A. ; Wu, K. ; Fedorova, E. A.Extern* ; Doronkin, D. E.Extern* ; Bartling, S.Extern* ; Lund, H. ; Jiang, G. (Corresponding author) ; Kondratenko, E. (Corresponding author)Extern*

2024
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jcat.2024.115440  doi:10.3204/PUBDB-2024-01186

Abstract: Due to the increased production of shale gas containing propane, the share of non-oxidative propane dehydrogenation (PDH) in the large-scale production of propene is expected to continue to grow. There are, however, some ecofriendly and cost shortcomings associated with the currently applied Cr- or Pt-containing catalysts. Against this background, we present here Co/ZrO$_2$ alternatives and reveal the fundamentals affecting their activity, which can be used for purposeful catalyst design. Co$^{2+}$ species homogeneously distributed within the lattice of ZrO$_2$ significantly increase the activity of coordinatively unsaturated Zr$^{4+}$ for the PDH reaction. The increase is caused by accelerating both the cleavage of CH bonds in propane and the recombination of surface H species, with the latter reaction being the rate-limiting step. The best-performing catalyst outperformed an analogue of commercial K-CrO$_x$/Al$_2$O$_3$ in terms of the rate of propene formation and demonstrated durable performance over a series of 10 PDH/regeneration cycles under industrially relevant conditions. It also outperformed most previously developed Co-containing catalysts in terms of propene productivity. The space–time yield of propene formation achieved at 57 % equilibrium propane conversion at 550 °C was 0.71 kg·h$^{−1}$·kg$_{cat}$$^{-1}$.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230372 (I-20230372) (I-20230372)
3. SWEDEN-DESY - SWEDEN-DESY Collaboration (2020_Join2-SWEDEN-DESY) (2020_Join2-SWEDEN-DESY)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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