(PDF) Basic Properties of FlueGas Desulfurization Gypsum
Gypsum (CaSO4 · 2H2O) from the FGD scrubbing process comprises ∼95% of the particulates. Iron oxide particles and cenospheres in the particulate samples are interpreted as coal combustion products. Particles interpreted as originating from unburned coal contain carbon and metals including Zn and Fe.