| abstract |
The absorption of CO 2 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 R 1 R 2 CHNHCH 2 COOK, in which R 1 and R 2 are n-alkyl radicals and the radicals R 1 and R 2 together have 2 to 4 carbon atoms, affords a high CO 2 absorption capacity per unit weight in the cyclical operation of absorption and desorption. |