EFFECT OF FUEL COMPOSITION ON THE CONVERSION OF VOLATILE SOLID FUEL-NTO N2O AND NO

Older fuels, which generally have a low fuel-O/fuel-N ratio, produce m ore N2O in fluidized bed combustion than younger fuels. Here, a propos al is made regarding the effect of fuel composition on the conversion of fuel-N to N2O and NO through HCN and NH3 at temperatures typical of fluidized bed combustion. Because earlier experiments have shown that the fuel oxygen plays an important role in fuel-N chemistry, fuel oxy gen was considered together with fuel nitrogen. In model compound stud ies, phenolic OH-groups in particular were found to increase the conve rsion of HCN to NH3. In general, the abundance of phenolic oxygen in f uel follows the fuel oxygen concentration. The importance of reactions between OH radicals and HCN was therefore considered.