Abstract: Techniques related to enhancement of CO2 absorption use selection of an enzyme coordinated with selection of an absorption solution having a pKa to enhance or maximize the CO2 capture rate. The techniques may use various relationships between process variables such as temperature, concentration, and so on, in order to provide efficient CO2 capture.

Abstract: An enzyme-catalyzed desorption process for releasing CO2 gas from an ion-rich solution containing bicarbonate ions includes providing carbonic anhydrase in the ion-rich solution such that in a desorption unit the carbonic anhydrase is allowed to flow with the ion-rich solution while promoting conversion of the bicarbonate ions into CO2 gas and generating an ion-depleted solution and releasing the CO2 gas and the ion-depleted solution from the desorption unit. A CO2 capture process includes contacting a CO2-containing gas with a solution in an absorption unit, to convert CO2 into ions; feeding an ion-rich solution to a desorption unit wherein carbonic anhydrase is present within the ion-rich solution to generate an ion-depleted solution and, preferably, recycling the ion-depleted solution. Methods of decreasing the CO2 desorption temperature in a desorption unit, decreasing the CO2 desorption reactor size, and decreasing the CO2 desorption energy input in a desorption unit, are also described.