CO2 Capture via Cyclic Calcination and Carbonation Reactions
The reversible carbonation and calcination reactions of, respectively, CaO and CaCO3 have very promising CO2 capture characteristics with regard to CO2 capture costs, theoretical CO2 uptake per gram of sorbent and material availability. However, CaO deriv
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CO2 Capture via Cyclic Calcination and Carbonation Reactions Marcin Broda, Roberta Pacciani and Christoph R. Müller
Abstract The reversible carbonation and calcination reactions of, respectively, CaO and CaCO3 have very promising CO2 capture characteristics with regard to CO2 capture costs, theoretical CO2 uptake per gram of sorbent and material availability. However, CaO derived from naturally occurring Ca-based materials, predominantly limestone, shows a rapid decrease in its CO2 capture capacity with number of carbonation/calcination cycles. The loss of the CO2 capture capacity of unsupported CaO has been attributed to dramatic changes in the material’s morphology due to sintering and pore blockage. However, since the molar volume of CaCO3 is more than twice as large as that of CaO, accessible pore volume in pores of diameter
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