https://doi.org/10.1016/j.egypro.2017.03.1167
“The effect of CaO content on the sorption capacity for CaCl 2 (T = 795 – 800°C) and eutectic CaF2/CaCl2
(T = 700 – 710°C) is shown in Figure 5.”
“Figure 5. Effect of CaO content on the sorption capacity in (a) CaCl2 with absorption temperature T = 795 – 800°C and (b) eutectic CaF2-CaCl2 with absorption temperature T = 700-710°C.”
“Analyses following the same procedure as for the temperature dependence show that the total sorption capacities
depend both on the CaO content and the salt mixture, while the reaction kinetics in the linear regions are
comparable. Both salts give higher capacities for higher CaO contents. For CaCl 2, the total sorption capacities are
ranging from 2.0 to 9.1g CO2 / 100g sorbent, while they are ranging from 2.7 to 10.6g CO2 / 100g sorbent for
eutectic CaF 2/CaCl2. The use of 20wt% CaO in both salts gives higher sustained capacities compared to
conventional calcium looping [8]. In the linear region, around 85% and 83% of the applied CO2 is captured for CaO
in CaCl2 and eutectic CaF2/CaCl2, respectively. The small difference could be due to experimental errors or the
difference in absorption temperatures. However, the linear regions last much longer for CaF2/CaCl2, and this salt
mixture is therefore favorable for CO2 capture in molten salts.”