Abstract: A gas desulfurization apparatus is disclosed. The apparatus includes a cylinder casing containing a number of rotating cylinders. Secured to each end of the rotating cylinders is a circular end plate, and within each of the cylinders is fill material having voids or cavities thereon. A desulfuring slurry reservoir is located in the base of the cylinder casing and a waste slurry pit is similarly connected the casing. A lifter is associated with each of the rotating cylinders and is arranged so that, as the cylinders rotate, a quantity of desulfuring slurry from the slurry reservoir is transferred into the associated rotating cylinder.