The predominant type of scrubber that has been installed or is being installed for SO 2 removal is the wet-limestone, forced-oxidation variety. The byproduct from these systems is gypsum (CaSO4∙2H 2 ...
In early 2019, Power Engineering published a report on a chemistry that can significantly enhance limestone reactivity and sulfur dioxide (SO 2) removal in wet flue gas desulfurization (WFGD) systems.