Optimization of the calcium silicate hydrated compounds synthesis from the recycling of material derived from coal industry waste
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2025
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SOUTHERN SCIENCE CONFERENCE, 2nd
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The intensification of society's consumption and population growth are the main aspects that most
contribute to negative impacts on living beings and environmental management due to the generation of large
quantities of waste generated daily by industrial production processes. As a result, the valorization of these
industrial by-products has been highlighted with the aim of obtaining value-added materials. The concepts of
reuse and recycling are presented as a new production model aiming at more sustainable processes.: In the
present work, the optimization of the synthesis of calcium silicate hydrated compounds was carried out from
sulfated coal ash generated in the flue gas desulfurization process in a thermoelectric plant using the two-stage
method (alkaline fusion followed by hydrothermal treatment). The studied parameters that influenced the
synthesis were fusion time, agitation time, volume of water for the hydrothermal treatment of the samples, and
two types of agitators (rod with blade-type propeller and shaking table). XRF and XRD characterized the ash and
products. According to the characterization results, the highest crystallinity of calcium silicate hydrated
compounds was identified in the product synthesized under the following conditions: fusion time of 3 h; volume of
water for hydrothermal treatment of 100 mL; agitation time of 2 h agitator equipped with rod and blade-type
propeller.: It can be concluded that sulfated ash is viable as a starting material for the formation of hydrated
calcium silicate compounds, following the principles of environmental sustainability and the objectives of the
circular economy.
Como referenciar
ALCANTARA-DOMINGOS, RAQUEL R.; FUNGARO, DENISE A. Optimization of the calcium silicate hydrated compounds synthesis from the recycling of material derived from coal industry waste. In: SOUTHERN SCIENCE CONFERENCE, 2nd, November 7-9, 2024, Mendoza, Argentina. Proceedings... Nova Prata, RS: Editora da Universidade de Vassouras, 2025. p. 609-612. DOI: 10.48141/SSCON_38_2024.pdf. Disponível em: https://repositorio.ipen.br/handle/123456789/49159. Acesso em: 20 Jan 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.