Nitrogen Oxide Abatement by Reduction with Ammonia and Zeolite Catalyst for the 50MW Hypersonic Test Leg Electrogasdynamics Facility.

摘要

Selective catalytic reduction, using ammonia as the reductant over a zeolyte catalyst, was chosen for the abatement of nitrogen oxides from the Facility (Technical Report AFFDL-TR-75-46). Equipment design specifications were prepared for a system consisting of: (a) two activated carbon adsorption beds, (b) two fluidized bed catalytic reactors, (c) bypass and emergency relief, and (d) temperature/ammonia controls. The activated carbon beds remove oil from the Facility reciprocating compressors to eliminate the potential of explosion with ammonium nitrate in the reactor. The fluidized bed reactor combines nitrogen oxide containing gas with ammonia producing nitrogen and water with less than 100 ppm residual nitrogen oxides. The reactor operates at 350-400C and uses the exothermic heat of reaction of nitrogen oxides and oxygen with ammonia to heat the 80C inlet gas and ammonia. The bed is jacketed with commercial heat transfer oil to remove excess heat. (Author)