Reutilization of the by-products from the calcination of magnesite as desulfurization agents: A sustainable and closed-loop process

World Congress and Expo on Recycling

July 20-22, 2015 Barcelona, Spain

R del Valle-Zermeno, J Formosa and J M Chimenos

Posters-Accepted Abstracts: J Environ Anal Toxicol

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.