SO2 Removal and Regeneration of MgO-Based Sorbents Promoted with Titanium Oxide

To improve the deactivation of the sorbent for the removal of SO 2 in residue fluid catalytic cracking plants, a Ce−Fe−MgO sorbent with excellent sulfur removal capacity and regeneration ability was modified by adding new promoters such as Ti, Al, and Zr. The sorbents were prepared by a coprecipitation method, and their sulfur removal capacities and regeneration abilities were measured in a fixed-bed reactor during multiple cycles. In particular, the sulfur removal capacity of the CeFeMgTi sorbent showed a high absorption value (41.2 g of sulfur/g of absorbent × 100) and excellent regeneration ability during multiple cycles. These results can be explained by the difference in their crystal structures and the physical and textural properties.