A fossil fuel containing 84% C, 15% H and 1%S is burned with 20% excess air in a boiler. The stack gases are at 150 C.
a) What is the concentration (ppm) of SO3 in the stack if equilibrium is established according to
SO2+1/2O2--->SO3
kp(atm^-1/2)=Pso3/(Pso2*Po2^(1/2)=1.53X10^-5exp(11750/T)