Method for capturing co2 and use of a metal-based surface for capturing co2

Abstract

A method for capturing CO2 from a fluid is provided. The method comprises the steps of providing a metal-based surface, adjusting the surface charge of the metal-based surface to a first state that allows adsorption of CO2 on the metal-based surface, and contacting the metal-based surface with the surface charge in the first state to a fluid containing CO2 to be captured, and allowing said CO2 to become adsorbed on the metal-based surface. The adjusting of the surface charge at step b) is carried out by (A) exposing or refraining from exposing the metal-based surface to radiation or (B) applying or refraining from applying a potential difference on the metal-based surface. The first state is one of the following (i) to (iii): (i) a positive surface charge, (ii) a negative surface charge, and (iii) a neutral surface charge.

Dependencies are inferred from the claim text.