REDUCTION OF SULFUR-DIOXIDE BY SYNGAS TO ELEMENTAL SULFUR OVER IRON-BASED MIXED-OXIDE SUPPORTED CATALYST

An iron-based supported catalyst has been developed for the reduction of SO2 by synthesis gas to obtain more than 97% yield of elemental sul fur with a single stage reactor for 340-480 degrees C (30-40 mesh part icles), 440-580 degrees C (d . 3 mm x h . 5 mm granules). Parametric s tudies on the performance of the catalyst have been conducted. The par ameters studied include temperature, space velocity, molar ratio of H- 2 to CO, molar ratio of syngas to SO2 in the feed, and particle size o f the catalyst. A lifetime test has been successfully performed. The m ass balance of sulfur and carbon has been demonstrated.