In this work

three types of limestone and two types of shell were chosen as SO2 sorbents.The physical and chemical properties of the sorbents were characterized by scanning electron microscope(SEM) and mercury porosimeter. Their sulfation characteristics were tested on a bench-scale fluidized bed reactor. Results showed that the surface area of the limestone was four or five times compared to that of the shell.However its mean pore radius showed an opposite trend. The optimum sulfation temperature of the limestone was about 900 ℃. For the shells

CaO conversion rate increased with temperature. It was found that the pore structural parameters played an important role in CaO conversion.