Method for capturing CO2

Abstract

The present invention addresses to a method that uses surface-active surfactants ionic liquids (ILs) with an affinity for water to capture CO2, especially ILs derived from surfactants, of low production cost, fluoride-free, causing a low environmental impact in its use and high yield of CO2 sorption. The CO2 sorption method consists of contacting a gas mixture with at least one of the described ILs, at the working temperature, pressure and partial pressure of CO2. The removal of CO2 is done by pressure reduction. ILs can be reused without loss of efficiency.

Dependencies are inferred from the claim text.