Operando X-ray diffraction analysis of the MnOx–ZrO2 catalyst during oxidation of propane

Operando X-ray diffraction analysis of the MnOx–ZrO2 catalyst during oxidation of propane Full article

Journal

Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779

Output data

Year: 2022, Volume: 63, Number: 6, Pages: 885-894 Pages count : 10 DOI: 10.1134/S0022476622060051

Tags

zirconium oxide, fluorite, powder X-ray diffraction, manganese oxide, in situ, “operando”

Authors

Bulavchenko O.A. ¹ , Vinokurov Z.S. ^1,2 , Konovalova V.P. ¹ , Afonasenko T.N. ³

Affiliations

1	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences
2	SKIF Center, Institute of Catalysis, Siberian Branch, Russian Academy of Sciences
3	Center of New Chemical Technologies, Institute of Catalysis, Siberian Branch, Russian Academy of Sciences

A series of MnOx–ZrO2 catalysts is prepared by coprecipitation with variation of the calcinationtemperature from 400 °C to 800 °C. It is shown that the catalyst calcined at 650-700 °C exhibits the highest activity in the propane oxidation reaction. The MnOx–ZrO2 catalyst is studied by operando X-ray diffraction under conditions of the propane oxidation reaction. The structural features of the catalyst are examined upon heating in propane or oxygen media or at the propane:oxygen ratio of 1:6. It is found that in pure propane, there is the dehydrogenation reaction on the catalyst with the formation of propylene and hydrogen and is accompanied by a change in the catalyst structure. The initial catalyst consists of a (Mn, Zr)O2 solid solution and Mn2O3 oxide. During the reaction, Mn cations are reduced in both (Mn, Zr)O2 solid solution bulk and compositions of crystalline oxides: Mn2O3 → Mn3O4 → MnO. Under the catalytic conditions of the propane oxidation reaction and in pure oxygen, the catalyst structure remains unchanged.

Bulavchenko O.A. , Vinokurov Z.S. , Konovalova V.P. , Afonasenko T.N.
Operando X-ray diffraction analysis of the MnOx–ZrO2 catalyst during oxidation of propane
Journal of Structural Chemistry. 2022. V.63. N6. P.885-894. DOI: 10.1134/S0022476622060051 WOS РИНЦ

Булавченко О.А. , Винокуров З.С. , Коновалова В.П. , Афонасенко Т.Н.
«Operando» — дифракционное исследование катализатора MnOx—ZrO2 при окислении пропана
Журнал структурной химии. 2022. Т.63. №6. С.751-760. DOI: 10.26902/JSC_id92417 РИНЦ

Submitted:	Oct 7, 2021
Accepted:	Jan 12, 2022
Published print:	Jun 30, 2022

Web of science	WOS:000819424400005
Elibrary	49152081