Abstract
Lithium orthosilicate is a candidate material for carbon dioxide adsorption and for the International Thermonuclear Experimental Reactor (ITER) DEMO and future fusion reactor. Solid State Reaction Process (SSRP) is one of the methods for the synthesis of lithium orthosilicate using silicon dioxide and lithium carbonate. In the present study, reaction kinetics of lithium orthosilicate synthesis by SSRP using lithium carbonate and silicon dioxide were studied using non isothermal Thermo-Gravimetric and Differential Thermal Analysis (TG–DTA). TG–DTA data analyzed using different methods for the prediction of kinetic triplet viz. pre-exponential factor (A), activation energy (E) and model for solid state reactions (f(α)). The lithium orthosilicate synthesis reaction of lithium carbonate and silicon-dioxide is controlled by nucleation mechanism for the synthesis of lithium orthosilicate and the best suitable reaction model for this reaction is Avrami–Erofeyev nucleation (A4). The average activation energy and pre-exponential factor calculated using various methods were 568 kJ/mol and 6.45 × 1028 min−1 respectively.
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Acknowledgements
The authors are thankful to, Shri D. R. Avhad, Shri C. A. Shinde, Shri R. Rathore and Shri S. Y. Sarang of Alkali Material & Metal Division, BARC for their constant assistance in this work.
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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Ghuge, N.S., Mandal, D., Jadeja, M.C., Chougule, B.K. (2022). Kinetics Analysis of Solid State Reaction for the Synthesis of Lithium Orthosilicate. In: Ratan, J.K., Sahu, D., Pandhare, N.N., Bhavanam, A. (eds) Advances in Chemical, Bio and Environmental Engineering. CHEMBIOEN 2021. Environmental Science and Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-96554-9_25
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