Compared with other combustors, lower NO emissions can
be achieved by employing the fluidized bed combustor (FBC).
This can be attributed to the lower operating temperature which
prevents the formation of the thermal NO and prompt NO during
the combustion process. On the other hand, biomass and
biomass-derived fuels are renewable energy sources. The
combustion of biomass and biomass-derived fuels is CO2-neutral
and can be seen as a primary measure to reduce this greenhouse
gas. To obtain a sustainable and clean environment, the
utilization of these fuels has to be increased and this is an
important issue of global energy strategies. Besides these
advantages, a possible drawback of these fuels combusting in
an FBC might be that the nitrogen of the fuel is converted in
relatively high amounts to NO and to a lesser extent to N2O,1,2
because the lower operating temperature will lead to more
nitrous oxides (N2O) emission. Therefore, from this viewpoint,
an FBC that combusts the biofuel is a versatile and relative
clean technology except with respect to NO and N2O emission.3
As we all know, NO is a harmful pollutant causing direct injuries
of the respiratory organs and is the precursor for acid rain and
ground-level ozone. N2O is a very strong greenhouse gas and
destroys ozone in the stratosphere. Meanwhile, NO is also an