A new process for converting SO2 to elemental sulfur by a cyclic process involving CaS and CaSO4 was earlier developed through thermodynamic and experimental investigations. In this process, the raw material CaSO4 is reduced to produce CaS, which is used to reduce SO2 to elemental sulfur and produce CaSO4. The latter is then reduced to regenerate CaS. It has been shown that the reaction temperature for the reduction Of SO2 to elemental sulfur is limited to approximately 1100 K for a reasonable degree of equilibrium conversion. It is the purpose of this paper to present the more favorable thermodynamic aspects of a similar cyclic process that involves BaS and BaSO4. It is shown that the reaction between SO2 and BaS is favorable to a much higher temperature of about 1400 K and the hydrogen reduction of BaSO4 to BaS is favorable in a much wider range of temperature.