Flue gas desulfurisation removes sulfur dioxide from the waste gases (flue gases) of power stations before they are released, to reduce acid rain.The flue gases are passed through a wet slurry of calcium oxide or calcium carbonate. SO2 is acidic, so it reacts with these bases.With calcium oxide: CaO(s) + SO2(g) → CaSO3(s)With calcium carbonate: CaCO3(s) + SO2(g) → CaSO3(s) + CO2(g)The calcium sulfite formed can be oxidised to calcium sulfate (gypsum), which is sold to make plasterboard.
Flue Gas Desulfurisation
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Specification: AQA Chemistry (7404), AS-level, 3.3.2.3 Combustion of alkanes. Topic: Alkanes.
More in Alkanes
- Thermal Cracking
- catalytic Cracking
- Combustion
- Polluting the Atmosphere
- Catalytic Converters
- Greenhouse Effect
- Carbon Neutral Activities
- Free-Radical Substitution
All 20 lessons in Alkanes · All AQA AS-level Chemistry topics