A Comparative Study of NOx Emission Characteristics in a Fuel Staging and Air Staging Combustor Fueled with Partially Cracked Ammonia

Recently, ammonia is emerging as a potential source of energy in power generation and industrial sectors. One the main concerns with combustion large amount NO emission. Air staging conventional method reducing emission which similar to Rich-Burn, Quick-Mix, Lean-Burn (RQL) concept. In air-staged combustion, major reduction based on near zero at fuel-rich NH3/Air mixture. A secondary air stream injected for oxidation unburned hydrogen NHx. On other hand, fuel-staged reduced by splitting NH3 injection, promotes thermal DeNOx process. this study, NOx characteristics partially cracked mixture are numerically investigated. First, system modeled chemical reactor network perfectly stirred plug flow detailed chemistry mechanism. Then, effects cracking, residence time, scheme analyzed. Finally, limitations optimal conditions each discussed.