Abstract
Using the method of impregnation in an excess of impregnating solution and subsequent temperature treatment in the temperature range of 100-400 °C, the synthesis of γ-modified catalytic systems based on transition metals (Co, Mo) supported on active aluminum oxide was carried out and their physicochemical properties were studied. A distinctive feature of these systems was the use of polyoxometalate complexes (molybdenum blues) obtained by mechanical activation of commercial molybdenum disulfide as a source of molybdenum. The carrier was obtained by high-temperature treatment of industrial pseudoboehmite powder AlOOH (Ishimbay Specialized Chemical Plant of Catalysts LLC). This approach makes it possible to significantly simplify the synthesis of catalytic systems. At the same time, the reagents and technologies used are publicly available and are produced on the territory of the Russian Federation on an industrial scale. The resulting systems are expected to be used in hydrotreating processes (hydrodesulfurization and hydrodenitrogenation) of diesel fractions. The synthesis included the stage of obtaining an impregnating solution by adding a weighed portion of cobalt nitrate to an alcohol solution of molybdenum blue, and the stage of directly impregnating the carrier in an excess of the impregnating solution. After impregnation, the systems were calcined at various temperatures in order to study the genesis of the active components and the effect of temperature treatment on various physicochemical properties. The synthesized systems were studied using various physicochemical methods (XRD, IR spectroscopy). It was found that to completely eliminate the nitro group from the system, a temperature treatment of at least 400 °C is necessary. It was also shown that molybdenum blue can act as a source of Mo. For citation: Zhirov N.А., Akimov Al.S., Sudarev Е.А., Akimov A.S. The influence of temperature treatment on the structural-phase composition of supported Со-Мо/Al2О3 catalytic systems. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 8. P. 44-49. DOI: 10.6060/ivkkt.20246708.3t.
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