A stirred cell reactor was fabricated and used to evaluate the activity of the carbonic anhydrase (CA) enzyme to promote the rate of CO2 absorption into the potassium carbonate (PC) solution. The absorption rate of CO2 into the PC solution mixed with 300 g/cu m CA was improved by 6-20 times compared to that with no addition of enzyme. Compared with the MEA solution, carbonate solutions with low heats of absorption showed much slower CO2 absorption rates. A mathematical model based on the Penetration Theory for the liquid phase mass transfer was developed and showed agreement with experimental results. The model was further used to investigate the impact of the CA dosage varying in a wide range on the CO2 absorption rate. At CA dosage levels > 3000 g/cu m, increasing the CA dosage does not improve the rate of absorption. The Integrated Vacuum Carbonate Absorption Process is thus a promising technology for capturing CO2. This is an abstract of a paper presented at the 103rd AWMA Annual Conference and Exhibition (Alberta, Canada 6/22-25/2010).