Kinetics of the reaction of carbon dioxide with aqueous sodium and potassium carbonate solutions

Encapsulated liquid sorbents for carbon dioxide capture

“…The absorption rate of pure carbonate solution (pool) can be estimated by 33 : ARTICLE where A is the interfacial area, P CO 2 is the partial pressure of CO 2 gas in the chamber and k solvent is the mass transfer coefficient of the solvent, which for carbonate solutions with low loading can be simplified to:…”

“…Absorption isotherms (equilibrium capacity) are typically reported for new solid sorbents. However, the vapour-liquid equilibria of carbonate solutions have been investigated previously 33,34 , and the MECS process is not expected to change the equivalent vapour-liquid equilibria of the encapsulated solvent. By contrast, absorption kinetics may be strongly affected by encapsulation.…”

Carbonate solutions for carbon capture: A summary

“…Knuutila et al (2010c) plot the viscosity, relative to water, of Na 2 CO 3 and K 2 CO 3 solutions up to 3 and 5.5 m, respectively, at 50…”

“…Using activity coefficients, however, is the more rigorous and modern approach. After combining their own measurements with some from the literature, Knuutila et al (2010c) …”

“…Figure 6 shows the pH of several carbonate/bicarbonate solutions for a range of CO 2 loading, as calculated by the CHESS software (van der Lee, 1998), based on the EQ3/6 chemical database (Woolery, 1992). Although the pH of pure K 2 CO 3 solutions can be as high as 13 or more (Knuutila et al, 2010c), the pH of loaded solutions is much lower and tends to remain in a narrower range. Additionally, the working swing between lean and rich loading is likely to stay within the shallow middle of the pH curve.…”