Conversion of NH3/CO/NO/CO2 mixtures

The present work addresses the impact of the presence of both CO and NO during the conversion of NH3 using CO2 or N2/Ar as bath gas, which would correspond to oxy-fuel or conventional air fuel combustion processes respectively. The variation of temperature and oxygen excess ratio is studied in a flow reactor setup at atmospheric pressure. Experimental results have been simulated with a literature detailed kinetic mechanism and the main observations have been discussed. The main results indicate that the effect of the presence of CO is less important than in other reactive systems. Conversion of NH3 is almost insensitive to the presence of CO, and the temperature regime for NH3 conversion is only significantly affected under fuel -lean conditions. The present results extend the experimental database on ammonia conversion, for different mixtures and conditions, and contribute to evaluate the possibilities of improving the ignition of this compound.