Ammonia is oxidized with air to form nitric oxide in the first step of the production of nitric acid. Two principal reactions occur:

4 NH₃ + 5O₂ ? 4NO + 6H₂O

2 NH_3?+ 3/2 O_2?? N_2?+ 3H₂O

A flowchart of the reactor follows.

(a) Taking elemental species [N₂ (g), H_2?(g), O_2?(g)] at 25?C as references, prepare and fill in an inlet? outlet enthalpy table.

(b) Calculate the required rate of heat transfer to or from the reactor in kW.

(c) What would have been different in your calculations and results in parts (a) and (b) if you had taken molecular species as references in part (a)?

Transcribed Image Text:

100 mol NH3(g)/min 25°C. 8 bar 900 mal air/min) 0.21 0₂ 0.79 N₂ 150°C. 8 bar REACTOR am Q(kJ/min) Product gas: 700°C, 8 bar 90 mol NO/min 150 mol H₂O(v)/min 716 mol N₂/min 69 mol O₂/min