Wet desulfurization of flue gas I General considerations

Many kinds of absorbents have been tested for wet FGD. From the points of view of a low-cost, easily available raw material with high absorption efficiency and, consequently, a smaller device requirement and lower operation costs, hydrated lime may be the best. In the wet GFD process by absorption with Ca(OH)2-in-water suspension as the absorbent, the following reactions are generally considered to occur in the liquid phase  

Therefore the system can be considered to meet the criteria of 4m 3, and the absorption is assumed to be totally controlled by diffusion of S02 through gas-film, as was done by Berman et al. [25]. 

Another feature of the system under consideration is that solid products are formed during the process. This may give rise to some engineering problems which must be addressed. 

---