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Reutilization of the by-products from the calcination of magnesite as desulfurization agents: A sustainable and closed-loop process
R del Valle-Zermeno, J Formosa and J M Chimenos
Abstract:
The European Commission is encouraging the Cement, Lime and Magnesium Oxide Manufacturing Industries to reutilize collected particulate matter or wastes in the emission control of SO2 with a 100% removal efficiency. Following this directive, three different by-products from the calcination of natural magnesite were selected in order to evaluate their desulfurization capacity. By this manner, the by-products from the calcination process itself could be reused as desulfurization agents in a sustainable and closed-loop process. The saturation time, defined as the time for the total neutralization of SO2was used to determine consumption values at laboratory scale with 100% removal efficiency. The optimum by-product was further analyzed with respect the synergistic effect of the most important parameters. Therefore, the reutilization of these by-products in a wet flue gas desulfurization process is a feasible and sustainable choice that allows extending their life-cycle.