Calcium Sulfate → Sulfur Dioxide

Participants

Reaction Steps

A method of increasing the sulfation capacity of particulate calcium carbonates for reaction with sulfur dioxide produced during the combustion of sulfur-containing carbonaceous material, comprising forming a fluidized bed of the sulfur-containing carbonaceous material and calcium carbonate particles and maintaining same at a temperature in the range of between about 700° C. and about 900° C. to form therein particles of calcium oxide and calcium sulfate, removing at least some of the particles of calcium oxide and calcium sulfate and hydrating same to form particles of calcium hydroxide and calcium sulfate, and dehydrating the particles of calcium hydroxide and calcium sulfate at elevated temperatures in the fluidized bed to form particles of calcium oxide and calcium sulfate for additional sulfation upon contact with sulfur dioxide in the fluidized bed elevated temperatures.

Provenance & Evidence