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Studying the Characteristics of a Waste Industrial Со-Мо/Al2O3 Catalyst for the Deep Hydrotreatment of Diesel Fuel

  • CATALYSIS IN PETROLEUM REFINING INDUSTRY
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Abstract

The physicochemical properties of a waste industrial Со-Мо/Al2O3 catalyst for the deep hydrotreating of diesel fuel are studied. IR spectroscopy, thermogravimetry (TG), differential thermal analysis (DTA), and scanning electron microscopy (SEM) are used to establish that the catalyst surface is uniformly coated with a coke film. This soft coke is mostly a mixture of saturated hydrocarbons with a low degree of branching in their structure. The coke is oxidized at temperatures of 190–375°C (soft coke) and 375–525°C (hard coke); its quantitative removal is achieved by means of oxidative calcination in air for 3 h at 550°C. X-ray diffraction, scanning electron microscopy, low-temperature nitrogen adsorption, and chemical analysis are used to show that the waste catalyst undergoes considerable structural transformation with a 7.7% drop in the Mo content and the accumulation of Fe, Ha, and V impurities. As a result of sintering, its specific surface area and total pore volume are reduced by 31.5 and 28.4%, respectively. The obtained data are needed to develop a scheme for its recycling.

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Authors and Affiliations

  1. National University of Science and Technology (MISiS), 119049, Moscow, Russia

    Yu. V. Sokolova, I. S. Belkina & T. A. Sviridova

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  1. Yu. V. Sokolova
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  2. I. S. Belkina
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  3. T. A. Sviridova
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Correspondence to Yu. V. Sokolova, I. S. Belkina or T. A. Sviridova.

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Translated by E. Glushachenkova

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Sokolova, Y.V., Belkina, I.S. & Sviridova, T.A. Studying the Characteristics of a Waste Industrial Со-Мо/Al2O3 Catalyst for the Deep Hydrotreatment of Diesel Fuel. Catal. Ind. 12, 127–132 (2020). https://doi.org/10.1134/S2070050420020087

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