In the production of CO2 within the Solvay process, calcium carbonate with 100% purity is used. It is fed in countercurrent into a vertical furnace with a flue gas to be decomposed. The gases exit from the top of the furnace while the solids (CaO) are collected at the bottom. CaCO3 is fed at 25C and the CaO leaves at 900C. Gas products leave the furnace at 250C, and the flue gas is fed at 600C with the following composition:

10% CO2, 15% CO, and 75% N2. Air is fed at 25C in stoichiometric proportions to burn it. The combustion of the flue gas is complete.

Compute the flowrate of flue gas in standard conditions to process 100 kg/s of CaCO3. Assume that heat loss and gas moisture are negligible.