Modeling the Use of Sulfate Additives for Potassium Chloride Destruction in Biomass Combustion

H. Wu, M. Nedergaard, J.B. Jespersen, M. Aho, F. Frandsen & P. Glarborg
Potassium chloride, KCl, formed from biomass combustion may lead to ash deposition and corrosion problems in boilers. Sulfates are effective additives for converting KCl to the less harmful K2SO4. In the present study, the decomposition of ammonium sulfate, aluminum sulfate and ferric sulfate was studied respectively in a fast­heating rate thermogravimetric analyzer (TGA) for deriving a kinetic model. The yields of SO2 and SO3 from the decomposition were studied in a tube reactor, revealing that...