Affiliation:
1. Lomonosov Moscow State University, Department of Petroleum Chemistry
and Organic Catalysis, Faculty of Chemistry
Abstract
Bimetallic heterogeneous catalysts based on SBA-15 containing molybdenum and iron oxides were studied in the oxidation reactions of model mixtures of organosulfur compounds. Iron additive (in the form of iron(III) oxide) in the amount of 0.05 wt % to the catalyst 5%Mo/SBA-15 turns out to be the most effective. The catalysts were confirmed by a complex of physicochemical methods: low-temperature adsorption-desorption of nitrogen, X-ray phase analysis, transmission electron microscopy, X-ray photoelectron spectroscopy. The influence of the main oxidation parameters (reaction time, temperature, composition and amount of catalyst, amount of oxidizer) on the conversion of dibenzothiophene as a component of the model mixture weas investigated. Optimal oxidation conditions that allow to achieve total transformation of the substrate were selected: H2O2 : S = 2 : 1, 0.5 wt % of the catalyst FeMo/SBA-15, 60 min, 60°C; catalysts can be used for at least 5 cycles without loss of activity during their intermediate washing from oxidation products.
Publisher
The Russian Academy of Sciences
Reference51 articles.
1. Zhang M., Liu J., Li H., Wei Y., Fu Y., Liao W., Zhu L., Chen G., Zhu W., Li H. // Appl. Catal. B: Environ. 2020. V. 271. P. 118936.
2. Lim X., Ong W. // Nanoscale Horizons. 2021. V. 6. № 8. P. 588.
3. Song Y., Fang W., Liu C., Sun Z., Li F., Xu L. // J. Phys. Chem. Solids. 2020. V. 141. P. 109395.
4. Tugrul Albayrak A., Tavman A. // Ultrason. Sonochem. 2022. V. 83. P. 105845.
5. Shafiq I., Shafique S., Akhter P., Abbas G., Qurashi A., Hussain M. // Catal. Rev. Sci. Eng. 2021. P. 1.