Reacción #56598

Ecuación de reacción

magnesium

magnesium hydroxide

sulfur dioxide

magnesium hydroxide slurry

sulfur dioxide

→

magnesium sulfite

magnesium bisulfite

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONmay be treated
2. 2
   workup.ADDITIONcontaining

Procedimiento

In lieu of a limestone or lime-based scrubbing system, flue gas containing sulfur dioxide may be treated by passing it through a scrubbing unit that utilizes a magnesium-containing scrubbing agent, e.g., a magnesium hydroxide slurry. The magnesium hydroxide reacts with sulfur dioxide to produce magnesium sulfite and magnesium bisulfite. The magnesium hydroxide slurry also reacts with hydrochloric acid in the flue gas, producing magnesium chloride, although there is very little hydrochloric acid in the flue gas compared to sulfur dioxide. The following chemical reactions occur in the scrubbing unit: SO2+Mg(OH)2→MgSO3+H2O  (1) H2O+SO2+MgSO3→Mg(HSO3)2  (2) Mg(HSO3)2+Mg(OH)2→2MgSO3  (3) 2HCl+Mg(OH)2→MgCl2+2H2O  (4)

Fuente