If we carefully examine the data that are reported in table6 it is possible to observe
that for acid gases (SO2, HCI, HF) the emission concentrations are dependent on abatement
devices, for suspended particles, CO and NOx on combustion conditions (T, air excess,
residence time), for metals and for the micro-pollutants on gasification conditions
(T, oxygen content, residence time, etc). More in general we can establish that if we
compare the performances of the two systems in term of concentrations in the flue gas,
the results are similar and convenient after an adequate treatment system.
In comparison with these results in table7 we report a comparison obtained by means of
mass balance, by using the same procedure previously indicated in paragraph 3.1