The Investigation on the Desulphurization Process of Porous CaO

The desulphurization reaction of porous CaO is a complex multi-model control process. It can be seen through SEM that, the calcination limestone is consisted of many CaO aggregation particles, the particle is consisted of a large mount of grains, and there are a lot of pores within those individual particles. Therefore, the product layer diffusion process is made up of two processes, one is gas diffusion in the particle product layer, the other is solid state ions diffusion in the grain product layer. Basing on the idealized model of a pellet with many grains, the diffusion equation was calculated out. It is shown that this dynamics equation may achieve a team of logical conversion curves through coupling the two diffusions, and the influence from non-linearity structure of CaO grain is evident.