Sulfur Dioxide → Magnesium bisulfite

Participants

Reaction Steps

In the present method, a sulfur dioxide-containing gas, such as a hot flue gas from the combustion of coal, is contacted, in a wet scrubbing unit, with an aqueous scrubbing solution containing magnesium sulfite and magnesium bisulfite. The initial aqueous scrubbing solution may be prepared by addition of magnesium hydroxide to water and, upon contact with the sulfur dioxide-containing gas, magnesium bisulfite and magnesium sulfite are formed as soluble magnesium salts. The magnesium sulfite reacts with sulfur dioxide to form magnesium bisulfite in aqueous solution according to the reactions:

Provenance & Evidence