In this Bureau of Mines study, two fluidized-bed reactors were designed, built, and operated, one as a sorber for so2 and the other as a contactor for the regeneration of the sulfur-laden alkalized alumina. The target of 90-percent removal of so2 from a flue gas stream containing 0.3 percent so2 was attained by using a sorbent feed of 10 to 15 grams per minute into a 5-inch bed depth of alkalized alumina. The sorption unit was operated at about 330 deg. C. Complete regeneratin of the laden alkalized alumina containing 5 to 10 percent sulfur was accomplished in approximately 1/2 hour. An excess of reformed propane at about 730 deg. C was the regenerating gas. Attrition losses, a major problem with this sorbent, ranged from 0.9 to 7.9 percent of the inventory. Data from these tests demonstrate, within experimental error, the validity of equations developed from short-term, thin-bed tests related to sorption and regeneration rates.