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Engineering Proceedings
Volume 37
Issue 1
10.3390/ECP2023-14743
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Proceeding Paper

Semi-Empirical Modelling for Dissolution of Calcium from Ironmaking Slag in Ammonium Acetate for CO2 Utilization †

by
Itumeleng Kohitlhetse
1,*,
Hilary Rutto
1,
Kentse Motsetse
1,
Malibongwe S. Manono
2 and
Moshe Mello
1
1
Clean Technology and Applied Materials Research Group, Department of Chemical and Metallurgical Engineering, Vaal University of Technology, Private Bag X021, Vanderbijlpark 1911, South Africa
2
Centre for Minerals Research, Department of Chemical Engineering, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
*
Author to whom correspondence should be addressed.
†
Presented at the 2nd International Electronic Conference on Processes: Process Engineering—Current State and Future Trends (ECP 2023), 17–31 May 2023; Available online: https://ecp2023.sciforum.net/.
Eng. Proc. 2023, 37(1), 125; https://doi.org/10.3390/ECP2023-14743
Published: 31 May 2023
(This article belongs to the Proceedings of The 2nd International Electronic Conference on Processes: Process Engineering—Current State and Future Trends)
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Abstract

Using iron and steel slags as feedstock for a mineral carbonation reaction using carbon dioxide gas is an excellent technique because they are easily accessible, contribute to land pollution, and have a reasonable quantity of lime and magnesia. The rate at which ironmaking blast furnace slag dissolves in an aqueous solution of ammonium acetate was investigated in relation to pH, stirring speed, solvent concentration, and temperature. A one-factor-at-a-time experiment was conducted, pH was monitored to the maximum value of 11, stirring speed ranged from 100 to 200 rpm, solvent concentration was adjusted from 0.01 to 1 M, whereas the reaction temperature was maintained between 25 and 80 °C. The dissolution kinetics of ironmaking slag were calculated by fitting experimental data to a model of a diminishing core. Using Atomic Absorption Spectroscopy, the leach liquor was characterized under various experimental conditions. The results of the trial revealed that this reaction is driven by a chemical reaction model equation. A semi-empirical model was also developed from the experimental data to better describe the dissolution kinetics.
Keywords: dissolution reaction; CO2 utilization; ironmaking slag; shrinking core models; semi-empirical modelling dissolution reaction; CO2 utilization; ironmaking slag; shrinking core models; semi-empirical modelling

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MDPI and ACS Style

Kohitlhetse, I.; Rutto, H.; Motsetse, K.; Manono, M.S.; Mello, M. Semi-Empirical Modelling for Dissolution of Calcium from Ironmaking Slag in Ammonium Acetate for CO2 Utilization. Eng. Proc. 2023, 37, 125. https://doi.org/10.3390/ECP2023-14743

AMA Style

Kohitlhetse I, Rutto H, Motsetse K, Manono MS, Mello M. Semi-Empirical Modelling for Dissolution of Calcium from Ironmaking Slag in Ammonium Acetate for CO2 Utilization. Engineering Proceedings. 2023; 37(1):125. https://doi.org/10.3390/ECP2023-14743

Chicago/Turabian Style

Kohitlhetse, Itumeleng, Hilary Rutto, Kentse Motsetse, Malibongwe S. Manono, and Moshe Mello. 2023. "Semi-Empirical Modelling for Dissolution of Calcium from Ironmaking Slag in Ammonium Acetate for CO2 Utilization" Engineering Proceedings 37, no. 1: 125. https://doi.org/10.3390/ECP2023-14743

APA Style

Kohitlhetse, I., Rutto, H., Motsetse, K., Manono, M. S., & Mello, M. (2023). Semi-Empirical Modelling for Dissolution of Calcium from Ironmaking Slag in Ammonium Acetate for CO2 Utilization. Engineering Proceedings, 37(1), 125. https://doi.org/10.3390/ECP2023-14743

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