Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Sugarcane Bagasse Ash as an Alternative Source of Silicon Dioxide in Sodium Silicate Synthesis

Version 1 : Received: 30 June 2023 / Approved: 30 June 2023 / Online: 30 June 2023 (11:09:15 CEST)

A peer-reviewed article of this Preprint also exists.

Pérez-Casas, J.A.; Zaldívar-Cadena, A.A.; Álvarez-Mendez, A.; Ruiz-Valdés, J.J.; Parra-Arciniega, S.M.; López-Pérez, D.C.; Sánchez-Vázquez, A.I. Sugarcane Bagasse Ash as an Alternative Source of Silicon Dioxide in Sodium Silicate Synthesis. Materials 2023, 16, 6327. Pérez-Casas, J.A.; Zaldívar-Cadena, A.A.; Álvarez-Mendez, A.; Ruiz-Valdés, J.J.; Parra-Arciniega, S.M.; López-Pérez, D.C.; Sánchez-Vázquez, A.I. Sugarcane Bagasse Ash as an Alternative Source of Silicon Dioxide in Sodium Silicate Synthesis. Materials 2023, 16, 6327.

Abstract

To reduce environmental impacts from sodium silicate synthesis it was suggested the use of sugarcane bagasse ash (SCBA) as a source of silicon dioxide and sodium carbonate using the ceramic method. Although the production of sodium silicate is carried out on a large scale, it should be noted that its process requires temperatures above 1000 °C or the use of highly corrosive agents such as sodium hydroxide and chlorine gas used to neutralize the remaining sodium hydroxide. In the present work, the synthesis temperatures were reduced to 800 °C with a reaction time of 3 hours by pressing equimolar mixtures of previously purified SCBA and sodium carbonate, then heat treatment was carried out under the indicated conditions. The resulting materials were analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Among the crystalline phases, calcium disodium silicate was identified, in addition to sodium silicate, so it was inferred that the other components of the ash can interfere with the synthesis of silicate. Therefore, to obtain the highest composition of sodium silicate, a leaching treatment of the SCBA is required.

Keywords

Sugarcane bagasse ash; solid state reaction; sodium silicate

Subject

Chemistry and Materials Science, Ceramics and Composites

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