Solubility and Solvation of Carbon Dioxide in the Molten Li2CO3/Na2CO3/K2CO3 (43.5:31.5:25.0 mol-%) Eutectic Mixture at 973 K I. Experimental Part

✍ Scribed by Paul Claes; Dominique Moyaux; Daniel Peeters

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 201 KB
• Volume: 1999
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199904)1999:4<583::aid-ejic583>3.0.co;2-y

✦ Synopsis

The solubility of CO 2 in the molten ternary eutectic mixture with literature data but the solubility value reported in this work is much higher than most of those reported in the Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 (43.5, 31.5, 25.0 mol.%) at 973 K has been determined by a titration technique. From the obtained literature. A chemical dissolution of CO 2 as C 2 O 5 2-is proposed and the consequences of the occurrence of this titration curve, the solubility has been found to amount to 9.5•10 -2 mol•L -1 (σ = 1.0) under a pressure of CO 2 of 1 atm species on the acidobasic properties of molten carbonates are discussed. It appears from the experimental results that the and the pK d value of the carbonate melt has been evaluated to 5.37 (σ 5 = 0.24) if the concentrations of the solutes are CO 2 /C 2 O 5 2-equilibrium in the carbonate melt is a slow process. expressed in mol•L -1 . This pK d value is in good agreement

The scales described in this way are quite satisfactory