Calcium looping is a promising process for carbon dioxide removal. The flow and heat transfer processes of the granular sorbent in a calcium looping CO2 capture system and the effects of the operating parameters on calcination efficiency and transport properties were studied. Both the rotation speed and the inclination angle significantly influence the dynamic properties of the granular matter.
Abstract
The calcium looping process has become a promising technology for reducing carbon dioxide emissions because of its lower energy consumption compared with other methods. A three-dimensional multifluid model based on the kinetic theory was employed to study the movement of granules in the calciner. The results demonstrated that an increase in the rotation speed and inclination angle of the calciner led to a decrease in the residence time of the particles. Simultaneously, the probability of the particles being heated was reduced. Insufficiently calcined particles reduce the carbon capture capacity in the next cycle; therefore, suitable operating conditions and mechanism designs are very important.