Process for CO₂ capture using carbonates and biocatalysts with absorption of CO₂ and desorption of ion-rich solution

摘要

A formulation and process for capturing CO₂ use an absorption mixture containing water, biocatalysts and a carbonate compound. The process includes contacting a CO₂-containing gas with the absorption mixture to enable dissolution and transformation of CO₂ into bicarbonate and hydrogen ions, thereby producing a CO₂-depleted gas and an ion-rich solution, followed by subjecting the ion-rich solution to desorption. The biocatalyst improves absorption of the mixture comprising carbonate compounds and the carbonate compound promotes release of the bicarbonate ions from the ion-rich solution during desorption, producing a CO₂ gas stream and an ion-depleted solution.