Ammonia (NH3) at 100 C and 150 kPa is burned with 20% excess Ò in the following reaction:
4NH3 + 5O2 -> 4NO + 6H2O
The ammonia is fed at 100 m^3/hr and the reaction is 80% complete. The NO is separated form the ammonia and water and recycled back as shown in the figure below. Calculate the volumetric flow rate (m^3/hr) of ammonia recycled at 150 C and 150 kPa.