Controlling SO2 Emissions: An Analysis of Technologies
Limestone Forced Oxidation Over the years, limestone forced oxi- dation (LSFO), which minimizes scaling problems in the absorber, has become the preferred process for wet FGD tech- nology worldwide. Gypsum scale typically forms via natural oxidation when the frac- tion of calcium sulfate in the slurry (slurry oxidation level) is greater than 15%.