The influence of calcined limestone on NOx and N_2O emissions from char combustion in fluidized bed combustors

摘要

Limestone addition to a coal-fired fluidized bed combustor usually results in an increase in NO/NOx emissions and a decrease in N_2O emissions. This observation has been explained in the literature by the effect of limestone on: (I) the conversion of coal volatile-N to NO/NOx and N_2O; (ii) the decomposition of N_2O; and (iii) the pool of H, OH and/or O radicals due to sulphur capture.