Experimental study on calcination and carbonation characteristics of calcium-based sorbents

Carbonation characteristics of CaO and calcined dolomite and calcination characteristics of dolomite were investigated in this paper.The results show that CaO can effectively absorb CO2 under the atmosphere of 20%vol CO2 in the temperature range of 550 ~700 ℃;CaCO3 began to decompose at 800°C,reaching the greatest decomposition rate at 870 ℃;Decomposition of dolomite takes place in two steps.In nitrogen atmosphere,temperature range of the two steps partially overlaps;In CO2 atmosphere,CaCO3 decomposes at higher temperature,making the two step reactions separated clearly.