Abstract. Carbon dioxide has a huge impact on the increase of greenhouse gas formation causing global warming and climate change. The most effective method to capture CO 2 is chemical absorption using potassium carbonate (K 2 CO 3 ) solution and amines as additive to enhance the absorption rate. CO 2 solubilities in 30% of K 2 CO 3 and 5% of the total composition of mixed methyldiethanolamine (MDEA)-diethanolamine (DEA) / piperazine (PZ)-DEA solutions at various temperatures of 303.15-323.15 K and atmospheric pressure are reported. The solubility data were measured using an equilibrium cell apparatus with the N 2 O analogy method. The E-NRTL model was used to correlate the experimental data accurately. The binary interaction parameters of the model for the CO 2 -K 2 CO 3 -MDEA-DEA-H 2 O and CO 2 -K 2 CO 3 -PZ-DEA-H 2 O systems were obtained. The CO 2 physical solubility in 30% of K 2 CO 3 , 5% of PZ, and 0% of DEA at 303.15 K had the highest value, while the Henry constant of CO 2 in this solution had the lowest value. The CO 2 loading increased with increasing partial pressure of CO 2 , while the CO 2 solubility decreased with increasing temperature. Any increase in MDEA concentration from 0% to 5% enhanced the CO 2 partial pressure, otherwise, an increase in PZ concentration from 0% to 5% decreased the CO 2 partial pressure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.