Flue Gas Desulphurisation (FGD)

Burning coal produces sulphur dioxide which is emitted through the chimney of the power station. To reduce these emissions – which contribute to acid rain – Flue Gas Desulphurisation units can be fitted to coal powered plants. These work by capturing the gases in an absorber, and then mixing them with limestone to produce gypsum which is dried and can be used in industry. This method leads to a 90% reduction in sulphur dioxide from coal-fired plants.