3 Conclusions
The additives of MgO and Mg(OH)2 increased the amount
(mass) of particle emissions by about 50% and the mass of the
deposits in the flue gas heat exchanger excluding loose fly ash
increased by about 25% compared to the combustion of pellets
without additives. The amount of loose fly ash caught in the
flue gas heat exchanger was also much higher using the
additives. The amount of additives was almost eight times
higher than the amount of the main alkali metals potassium (K)
and sodium (Na) which leads to the assumption that the
additives were overdosed and therefore caused the problems
reported.