TEXT
A power plant operates with 800 ppm NOX in the flue gas. The flue gas flow rate is 150000 m3/h at 300°C and 1 atm. An SCR system is being designed for 75% removal of NOx. Calculate the stechiometric amount of ammonia required in kg/day.
R= 8.20573E-05 m3 atm K−1 mol−1
MW NO= 30.01 g/mole
MW NO2= 46,01 g/mol
MW NH3 =17.031 g/mole
SOLUTION
Volume= 1.50E+05 m3/h
T=300 °C
Preassure= 1 atm
Assuming that NOX is represented by the 100% of NO2
n=(P*V)/(R*T)
Flow NO2=2552.1 moli/h → 2552.1 *46/1000 = 117 kg/h
Efficiency = 0.75
8/6 moles of NH3 is required per 1 moles of NO2.
Amount of ammonia =0.75*8/6*(2552.1*17.031)*24/1000=1043 kg/day