1. Eskom removes sulphur dioxide (SO2), which is a by-product of fossil fuel combustion, from the flue gases. This SO2 is removed by means of a wet flue gas desulphurisation system. The flue gas flows through a spray of calcium carbonate (limestone) slurry and forms an end product of calcium sulphate (gypsum).
2. (2)(a) Therefore, no sulphur in its pure, corrosive form is extracted from the absorber, and no sulphur is being sold. The gypsum is currently disposed of on site in a designated area on the power station premises as per licence. The future plan is to sell the gypsum as it can be used in the industry.
(2)(b) No corrosive chemical is being stored and no revenue is being generated at this stage from gypsum.