Summary
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1.
Mineralizing oxides (MoO3 and V2O5) and stabilizing oxides (NiO and Cr2O3) have been investigated in relation to their influence on the stability of structural-mechanical properties of aluminum oxide catalysts during prolonged heat treatment.
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2.
It has been established that all of the alumina-molybdenum catalysts (MoO3 contents from 4 to 20%) remain stable during treatment at 600°C. For the catalysts containing up to 5% MoO3, there is no change in structural-mechanical properties when treated at 700 or 800°C. With MoO3 contents above 5% and a treating temperature of 700°C or higher, the heat stability of the catalyst is governed by the mutual influence of temperature and the quantity of the active oxide in the specimen.
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3.
In the example of nickel and chromium oxides, it has been shown that these different stabilizers retard the phase-conversion process of the active aluminum oxide in different stages.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 11. pp. 15–19, November, 1975.
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Katsobashvili, Y.R., Kurkova, N.S., Safonova, V.F. et al. Stability of structural-mechanical properties of catalysts based on aluminum oxide with mineralizing and stabilizing oxides. Chem Technol Fuels Oils 11, 844–849 (1975). https://doi.org/10.1007/BF00731796
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DOI: https://doi.org/10.1007/BF00731796