use of CaO/CaCO3 to remove SO2 for flue gas desulphurisation

• equation for the reaction that occurs during flue gas desulphurisation

  CaO + SO2 ——> CaSO3
• what is the type of reaction that occurs during flue gas desulphurisation

  neutralisation or acid-base reaction
• what’s the use of a product from flue gas desulphurisation

  plaster / gypsum