Abstract
A study is performed of the procedure for preparing a catalyst of the decomposition of nitrogen(I) oxide. Decomposition catalysts were prepared through the mechanochemical synthesis of cobalt ferrite from a mixture of iron and cobalt oxalates. It is established that preliminary mechanochemical activation of the initial components in a roller ring vibration mill allows the temperature of cobalt ferrite synthesis to be reduced to 300°C, yielding a product with a more developed specific surface area and porous structure. The catalytic properties of cobalt ferrite with different ratios of the main components (CoO : Fe2O3 = 0.7–1.3) are studied in the temperature range of 100–500°C. It is shown that raising the content of CoO in the composition of cobalt ferrite to a ratio of 1.3 lowers the temperature of the 50% decomposition of N2O from 420 to 370°C. The effect water vapor, O2, and H2 have on the reaction is revealed. The effect pressure and temperature have on the activity of a catalyst based on cobalt ferrite is established for the decomposition of N2O.
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The practical part of this work was performed under conditions of the 2012–2022 “Program for the Processing of Hydrocarbon Raw Materials” at the RF Ministry of Education and Science’s Laboratory for the Synthesis, Research, and Testing of Catalytic and Adsorption Systems, topic no. FZZW-2020-0010. It was supported by the President of the Russian Federation, stipend no. 15493GU/2020.
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Denisova, K.O., Il’in, A.A., Il’in, A.P. et al. Effect of Catalyst Composition and Process Conditions on the Catalytic Efficiency of Cobalt Ferrite in the Decomposition of Nitrogen(I) Oxide. Russ. J. Phys. Chem. 95, 2014–2019 (2021). https://doi.org/10.1134/S0036024421100058
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DOI: https://doi.org/10.1134/S0036024421100058