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Abstract <p>Based on the data of thermogravimetric (TG) analysis of calcination of two TiO<sub>2</sub> samples obtained by the hydrothermal method (sample 1) and the sol-gel method (sample 2), the kinetic parameters of the process were estimated. The kinetics of calcination of TiO<sub>2</sub> samples was studied at heating rates of 5, 10 and 20°С/min in an inert environment (argon). The results of model-free kinetic analysis were obtained using the Friedman method. The activation energy (<i>E</i><sub>a</sub>, kJ/mol) of the calcination process for sample 1 is twice as high as for sample 2: 89 and 44 kJ/mol, respectively. The proportion of pore volume in the total volume of the material (porosity) was 9.3% for sample 1 and 18.3% for sample 2. It is shown that the method of synthesis TiO<sub>2</sub> samples significantly affects the kinetics of their calcination.</p>

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Kinetiсs of TiO2 Samples Calcination

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • T. V. Kulikova,
  • N. V. Pechishcheva,
  • D. A. Kovalenko,
  • V. A. Bykov,
  • L. G. Burdina,
  • A. A. Belozerova

摘要

Abstract

Based on the data of thermogravimetric (TG) analysis of calcination of two TiO2 samples obtained by the hydrothermal method (sample 1) and the sol-gel method (sample 2), the kinetic parameters of the process were estimated. The kinetics of calcination of TiO2 samples was studied at heating rates of 5, 10 and 20°С/min in an inert environment (argon). The results of model-free kinetic analysis were obtained using the Friedman method. The activation energy (Ea, kJ/mol) of the calcination process for sample 1 is twice as high as for sample 2: 89 and 44 kJ/mol, respectively. The proportion of pore volume in the total volume of the material (porosity) was 9.3% for sample 1 and 18.3% for sample 2. It is shown that the method of synthesis TiO2 samples significantly affects the kinetics of their calcination.