Improving the SO2 absorption rate of CeFeMg-based sorbent promoted with titanium promoter

Abstract

To improve the poor SO 2 absorption rate of CeFeMgTi sorbent with high sulfur removal capacity and fast regeneration, a new sorbent, CeFeMgTi-sol was prepared by the modified co-precipitation method and tested in a packed bed reactor at RFCC conditions (sulfation of MgO to MgSO 4 in the presence of low concentration of SO 2 at 973 K, regeneration of MgSO 4 to MgO and H 2 S in the presence of H 2 at 803 K). The CeFeMgTi-sol sorbent showed excellent SO 2 absorption and sulfur removal capacity (46.2 sulfur g/g absorbent×100). It was found that the SO 2 absorption rates were related to the structure of the Mg and Ti and the textural properties such as surface area and pore volume. In the case of the fresh state of CeFeMgTi sorbent, CeO 2 , MgO and MgTiO 3 structures were observed. But the new CeFeMgTisol sorbent before SO 2 absorption, showed a separated MgO and TiO 2 peak only. These differences in the sorption rates were discussed by the difference in the XRD pattern, surface area and pore volume.

Sulfur Dioxide Removal from Flue Gas by Supported CuO Nanoparticle Adsorbents

“…) ln e t e 1 (9) where q t and q e are the adsorption amounts at any time and at equilibrium time (mg/g), respectively. k 1 is the kinetic constant of pseudo-first-order adsorption (L/min).…”

“…So, their utilization in the industry is limited. The chemisorption of SO 2 by solid materials is a promising method for FGD due to its high efficiency, low cost, low energy consumption, regeneration possibility, and less environmental damage. , In this study, the chemisorption process was utilized for the removal of SO 2 . It is an applicable method for the different industrial processes, according to the following reactions: …”