A stepped, perforated tray is provided for increasing the available gas-slurry
contact area in a flue gas desulfurization chamber. The tray redirects the horizontal
flow upwardly through the tray for increased surface area and contact time with
slurry for removing SOx or other contaminants from a fossil fuel combustion
flue gas before releasing the flue gas to the atmosphere. The tray is adaptable
for use in vertical tower systems as well.
