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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.

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First Claim