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

US8722391B2 · kind B2 · utility

Assignee

• CO2 Solutions Inc. · CA

Inventors

• Sylvie Fradette · Maniwaki, CA
• Julie Gingras · Keyano, CA
• Jonathan Carley · Mississauga, CA
• Glenn R. Kelly · Trois-Rivières, CA
• Olivera Ceperkovic · Keyano, CA

Key dates

• Filing date: Aug 4, 2010
• Grant date: May 13, 2014
• Expiry date: Aug 4, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/59
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.