Manganese Catalysts for the Ozone-Assisted Oxidation of Volatile Organic Compounds: Effect of the Mn3+/Mn4+ Active Site Ratio on Catalytic Properties

Manganese Catalysts for the Ozone-Assisted Oxidation of Volatile Organic Compounds: Effect of the Mn3+/Mn4+ Active Site Ratio on Catalytic Properties Full article

Journal

Kinetics and Catalysis
ISSN: 1608-3210 , E-ISSN: 0023-1584

Output data

Year: 2022, Volume: 63, Number: 5, Pages: 515-522 Pages count : 8 DOI: 10.1134/s0023158422050081

Authors

Mytareva A.I. ¹ , Gilev A.S. ² , Mashkovsky I.S. ¹ , Bokarev D.A. ¹ , Baeva G.N. ¹ , Kanaev S.A. ¹ , Kazakov A.V. ¹ , Stakheev A.Yu. ¹

Affiliations

1	Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991 Russia
2	Higher Chemical College, Russian Academy of Sciences, Mendeleev University of Chemical Technology of Russia, Moscow, 125047 Russia

The catalytic properties of supported Mn/carrier catalysts (carriers: Al2O3, SiO2, SiO2–Al2O3) in the ozone-assisted oxidation of volatile organic compounds (using the example of n-С4Н10) in a temperature range of 25–350°С have been studied. X-ray diffraction analysis and H2-TPR have shown that the carrier has a significant effect on the valence state of manganese in the supported oxide: on the SiO2 surface, manganese is present mostly in the form of Mn3+ (Mn2O3, Mn3O4), whereas in the Mn/Al2O3 and Mn/SiO2–Al2O3 catalysts the dominant species is Mn4+ (MnO2). Comparison of data on the composition of MnOx active phases and catalytic properties in the ozone-assisted oxidation of n-С4Н10 has revealed that an increase in the content of Mn3+sites contributes to an enhancement of the catalytic activity of Mn/support. However, an excess amount of Mn3+ leads to the consumption of ozone in a side reaction to form O2, which leads to a significant decrease in the n-С4Н10 oxidation efficiency. The data suggest that the maximum activity of the catalyst in the ozone-assisted oxidation of n-С4Н10 can be achieved via providing an optimum Mn3+/Mn4+ ratio.

Mytareva A.I. , Gilev A.S. , Mashkovsky I.S. , Bokarev D.A. , Baeva G.N. , Kanaev S.A. , Kazakov A.V. , Stakheev A.Y.
Manganese Catalysts for the Ozone-Assisted Oxidation of Volatile Organic Compounds: Effect of the Mn3+/Mn4+ Active Site Ratio on Catalytic Properties
Kinetics and Catalysis. 2022. V.63. N5. P.515-522. DOI: 10.1134/s0023158422050081 WOS Scopus OpenAlex

Web of science:	WOS:000856975300007
Scopus:	2-s2.0-85138632321
OpenAlex:	W4296829181

DB	Citing
OpenAlex	7
Scopus	8
Web of science	8