Kinetics of the reduction of nitrogen oxides with ammonia on carbon sorbents

The effect of temperature on the reduction of nitrogen oxide with ammonia on the Polish carbon sorbent SWS-6, assigned for the purifcation of combustion gases has been tested. These investigations were carried out in a flow system with a stable bed of the carbon sorbent. The dependence of the equilibrium degree of the reduction of nitrogen oxide on temperature and on space time of the purified gases with the sorbent bed has been determined. The optimal process temperature proved to be 120st. C. The obtain kinetic data were interpreted by means of the integral method. It has been found that the reaction of the reduction of nitrogen oxide can be expressed by a kinetic equation of the first order in relation to NO and NH3. The activation energy of this process amounts to 57.7 kJ/mole in the temperature range from 60 to 80st.C, and to 3.91 kJ/mole in the temperature range from 100 to 160 st.C.