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Figure 7
Area evaluation of reflections at 1.80° (corresponding to MonO3n–x) as well as at 4.01° (corresponding to MoO2). The areas were normalized to the maximum area obtained at the respective reflections. α (black line, 18 mm) marks the position of full gas phase oxygen conversion with different catalyst performance before and after. β (gray area, 18–24 mm) marks the catalyst bed range where the catalyst undergoes distinct phase transformations. Reaction conditions: C2H6/O2/N2:10/10/80, 515°C, 1 bar, OD 6 mm/ID 5.6 mm, 38 mm catalyst bed, 15 ml min−1, 30 wt% MoO3/γ-Al2O3, beam size 0.5 × 0.5 (H × V), 103.413 keV (λ = 0.1199 Å).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 30| Part 3| May 2023| Pages 571-581
https://doi.org/10.1107/S1600577523001613
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