The SEM analysis of the substrates placed in the flue gas
heat exchanger indicate that the deposits of sodium (Na),
potassium (K), chlorine (Cl) and sulphur (S) decrease using
the additives. If this was due to the expected chemical
reactions or due to the loose fly ash covering the substrates
after the test, could not be determined in this study.
The additives reduce the amount of carbon in the ash box,
however the energy saving potential is small as the remaining
amount of energy in the ash box was below 1% for all tested
pellets.