Consider the extraction of energy from the tail gases from a nitric acid adsorption tower.
Gas composition, kmol/h:
If the gases leave the tower at 6 atm, 25 °C, and are expanded to, say, 1.5 atm, calculate the turbine exit gas temperatures without preheat, and if the gases are preheated to 400 °C with the reactor off-gas. Also, estimate the power recovered from the preheated gases.