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Abstract <p>The applicability of iron oxide powder, a waste product from the production of organic dyes, as a raw material for obtaining oxide catalysts has been studied. The physicochemical characteristics of the starting material and the samples after various types of treatment (mechanochemical activation (MA), ultrasonic treatment in an oxalic acid solution) were studied by X-ray diffraction analysis, Mössbauer spectroscopy, scanning electron microscopy, and low-temperature nitrogen adsorption. It was established that the optimum physicochemical characteristics are achieved with combined processing: ultrasonic dissolution in oxalic acid followed by calcination at 425°C. The use of mechanochemical activation and ultrasonic treatment allows us to regulate the composition and properties of the resulting oxides (substructural characteristics, particle size, specific surface area, and porous structure). The use of these processing methods allows us to control the formation of optimum properties required for the majority of the catalysts of conversion of carbon monoxide with water vapor and biomass pyrolysis.</p>

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Influence of Processing Conditions on the Physicochemical Properties of Iron Oxides for the Production of Catalysts

  • 期刊论文

  • 发表日期：

    2025年10月16日

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  • R. N. Rumyantsev,
  • T. E. Nadtoka,
  • N. S. Pavlova,
  • N. E. Gordina,
  • Le Thi Mai Huong,
  • Dang Tran Tho

摘要

Abstract

The applicability of iron oxide powder, a waste product from the production of organic dyes, as a raw material for obtaining oxide catalysts has been studied. The physicochemical characteristics of the starting material and the samples after various types of treatment (mechanochemical activation (MA), ultrasonic treatment in an oxalic acid solution) were studied by X-ray diffraction analysis, Mössbauer spectroscopy, scanning electron microscopy, and low-temperature nitrogen adsorption. It was established that the optimum physicochemical characteristics are achieved with combined processing: ultrasonic dissolution in oxalic acid followed by calcination at 425°C. The use of mechanochemical activation and ultrasonic treatment allows us to regulate the composition and properties of the resulting oxides (substructural characteristics, particle size, specific surface area, and porous structure). The use of these processing methods allows us to control the formation of optimum properties required for the majority of the catalysts of conversion of carbon monoxide with water vapor and biomass pyrolysis.