The balanced chemical reaction for the thermal decomposition of calcium sulfate is: 2CaSO4 -> 2CaO + 2 SO2 +O2. The following information should also be noted:
Molar mass of CaSO4: 136.14 g/mol
Molar mass of SO2: 64.066 g/mol
Using stoichiometry to determine the amount of calcium sulfate that will be produced from each metric ton of SO2 trapped, the resulting equation is: (136.14/64.066)(2/2). Thus, the amount of calcium sulfate to be produced is theoretically equal to 2.12 metric tons.