In this paper

calcination characteristics and desulfurization property of several kinds of shells are studied by using thermogravimetic analysis methods.On the basis of theoretical analysis and experimental study

the kinetic model of shell calcination reaction is obtained and apparent activation energy is calculated and compared with that of limestones.The results indicate that apparent activation energy of shells is approximately 100?kJ·mol -1 lower than that of limestone.By using SEM

the microstructure of shells can be observed.From SEM photos of shells and limestone

this paper compares shells with limestone in specific surface area and porosity.Finally the reason for better desulfurization with shells than with limestones can be explained.