Method and absorption medium for absorbing CO2 from a gas mixture

US9878285B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Alexander Schraven · Issum, DE
• Gunter Knaup · Bruchköbel, DE
• Rolf Schneider · Burgstetten, DE

Key dates

• Filing date: Nov 28, 2012
• Grant date: Jan 30, 2018
• Expiry date: Nov 28, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The absorption of CO2 from a gas mixture by contacting the gas mixture with an absorption medium that comprises water and 5 to 50 wt % of amino acid salts of formula R1R2CHNHCH2COOK, in which R1 and R2 are n-alkyl radicals and the radicals R1 and R2 together have 2 to 4 carbon atoms, affords a high CO2 absorption capacity per unit weight in the cyclical operation of absorption and desorption.