Input on the Measurement and Comprehension of CO2 Solubility in Molten Alkali Carbonates in View of Its Valorization. Issue 6 (18th March 2020)

• Record Type: Journal Article
• Authors: Meléndez-Ceballos, A.; Gürbüz, E.; Brouzgou, A.; Albin, V.; Ringuedé, A.; Lair, V.; Cassir, M.
• Is Part Of: Journal of the Electrochemical Society. Volume 167:Issue 6(2020)
• Publication Date: 2020-03-18
• Subjects: Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/1945-7111/ab7ce1
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : As the capture and valorization of CO2 in molten carbonates is nowadays becoming a strategic energy topic, the need of accurate solubility measurements of such molecule is becoming compulsory. This study provides a new set of reliable CO2 solubility values, determined by a a carefully adapted manometric setup, in Li2 CO3 -K2 CO3 (62:38 mol%), Li2 CO3 -Na2 CO3 (52:48 mol%), Li2 CO3 -Na2 CO3 -K2 CO3 (43.5:31.5:25.0 mol%) and Na2 CO3 -K2 CO3 (56:44 mol%) carbonate eutectics in an overall range of temperatures from 450 to 850 °C. High solubility values are obtained for Li-K and Li-Na eutectics, respectively 1.7 × 10 −1 and 1.1 × 10 −1 mol atm −1 l −1 at 650 °C. It is shown that CO2 solubility increases with the temperature for most of the eutectic mixtures. Another important trend is that the Li content significantly increases the solubility.