Dissolution kinetics of aluminosilicates from biomass ashes in alkaline solutions

This research explores the influence of fly ash source, alkali concentration and temperature on dissolution kinetics Al Si. The characteristics reaction products solid residue were evaluated with ICP-MS, SEM-EDS, quantitative XRD. It was found that occurs faster a higher yield compared to Si for both types. NaOH had similar effect Al, while influenced more by concentration. simultaneous aluminosilicates achieved keeping at 30 °C, where precipitation prevented, dissolved close its maximum value. Kabai Model most suitable explain sources, described 1-dimensional diffusion, Jander Ginstling-Brounsthein models.