Morphology Of Ca O-based Sorbents And Their Improved Performance Of CO₂ Capture

Carbon dioxide is a well-known greenhouse gas(GHG)and hence contributes a significant role on global warming and climate change.More and more attention has been paid on carbon dioxide capture with CaO-based sorbents.In this paper,the influence of surfactant and inert material on the morphology and carbon dioxide adsorption capacity of the CaO-based sorbents was investigated.The peanut shaped calcium based sorbent was prepared by precipitation method via the presence of PSS(Sodium Polystyrene Sulfonate)and F127(Polyether)surfactants.The optimized concentrations of PSS and F127 were 1 g/L and 3 g/L,respectively.The ratio of Ca and Mg was 1.It was found that MgO inert material had important influence on the morphology and carbon dioxide adsorption capacity of the CaO-based sorbents.The stability of the sorbent had been improved significantly by the addition of MgO inert material to the CaO-based sorbents.A hollow spherical calcium-based adsorbent can be prepared by a simple precipitation reaction of calcium chloride and sodium carbonate using a soft template method with SDS as a template agent.The optimal concentration of SDS was 2 g/L.The aging time would affect the hollow degree and shell thickness of hollow spherical calcium-based sorbent particles.As the maturation process proceeded,the hollowness of the particles increased.