A process for reducing an amount of sulfur trioxide present in a flue gas
stream (20), including the steps of processing an alkaline material (24)
to comprise a predetermined percentage of particles, based on the mass of
alkaline material introduced into a flue gas stream (20), having a size
less than a predetermined dimension and introducing the processed
alkaline material (24) to the flue gas stream (20), wherein the processed
alkaline material (24) reduces the amount of sulfur trioxide present in
the flue gas stream (20).