COMPARISON OF DIFFERENT METHODS FOR ENHANCING CO2 CAPTURE BY CaO-BASED SORBENTS. REVIEW

CaO-based sorbent looping cycle, i.e. cyclic calcination/carbonation, is one of the most perspective technologies for CO2 capture during coal combustion and gasification processes. This study deals with different methods of enhancing CaO based sorbents activity. We also present the results of our research on the use of dolomite from Siewierz and limestone from Czatkowice. The limestone carbonation conversion in the initial cycles is worse than pure CaO, but its carbon dioxide capture parameters are better than the parameters of dolomite. Sintering appears to play a significant role in the decay of CaO-based sorbents. The annealing effect for different sorbents was investigated. Tests were performed for calcium acetate, calcium hydroxide, dolomite from Siewierz and pure CaO.