<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The influence of temperature and sulfuric acid concentration on the enthalpy and the rate of heat release during the reaction of Norwegian and Australian ilmenites with sulfuric acid was determined. The experimental results obtained from calorimetric measurements were compared with theoretical calculations based on the oxide composition and the phase composition of the raw material. Experimentally determined heat of reaction for Norwegian ilmenite (900–940 kJ/kg) and Australian ilmenite (800–840 kJ/kg) showed good agreement with theoretical calculations based on the phase composition of the raw material. It was found that the enthalpy of ilmenites decomposition reaction does not depend on the concentration of sulfuric acid in the concentration range from 83% to 93%. It was also demonstrated that the temperature and concentration of sulfuric acid have a significant impact on the thermokinetics of the decomposition process, increasing the value of the average rate of temperature change.</p>
</abstract>

The influence of temperature and sulfuric acid concentration on the enthalpy and the rate of heat release during the reaction of Norwegian and Australian ilmenites with sulfuric acid was determined. The experimental results obtained from calorimetric measurements were compared with theoretical calculations based on the oxide composition and the phase composition of the raw material. Experimentally determined heat of reaction for Norwegian ilmenite (900–940 kJ/kg) and Australian ilmenite (800–840 kJ/kg) showed good agreement with theoretical calculations based on the phase composition of the raw material. It was found that the enthalpy of ilmenites decomposition reaction does not depend on the concentration of sulfuric acid in the concentration range from 83% to 93%. It was also demonstrated that the temperature and concentration of sulfuric acid have a significant impact on the thermokinetics of the decomposition process, increasing the value of the average rate of temperature change.

Heat effects in the reaction of sulfuric acid with ilmenites influenced by initial temperature and acid concentration

West Pomeranian University of Technology Szczecin, Faculty of Chemical Technology and Engineering

Department of Organic and Physical Chemistry

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution 4.0 International License.

The influence of temperature and sulfuric acid concentration on the enthalpy and the rate of heat release during the reaction of Norwegian and Australian...

Heat effects in the reaction of sulfuric acid with ilmenites influenced by initial temperature and acid concentration

Published Online: Oct 14, 2021

Page range: 37 - 42

DOI: https://doi.org/10.2478/pjct-2021-0028

Keywords
ilmenites digestion, sulfuric acid, enthalpy of reaction

© 2021 Maciej Jabłoński et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Heat effects in the reaction of sulfuric acid with ilmenites influenced by initial temperature and acid concentration

Published Online: Oct 14, 2021

Page range: 37 - 42

DOI: https://doi.org/10.2478/pjct-2021-0028

Keywordsilmenites digestion, sulfuric acid, enthalpy of reaction

© 2021 Maciej Jabłoński et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
ilmenites digestion, sulfuric acid, enthalpy of reaction