Abstract
AbstractLithium 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.KeywordsSolid state reactionThermo gravimetric and differential thermal analysis (TG–DTA)Lithium orthosilicate
Published Version
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