| 摘要 |
An absorbent for removing acid gases from a fluid flow comprises an aqueous solution of: a) at least one amine, comprising at least one amine having solely tertiary and/or sterically hindered amino groups, and b) at least one organic phosphonic acid selected from phosphonic acids of formula IIwhere R' is H or C-alkyl, Q is H, OH or NYand Y is H or CHPOH, or a mixture of two or more thereof, wherein the molar ratio of b) to a) ranges between 0.01 and 0.1, and also a process for the removal of acid gases from a fluid stream. For example, the phosphonic acid is 1-hydroxyethane-1,1-diphosphonic acid. Compared to absorbents based on amines or amine/promoter combinations, the absorbent requires less regeneration energy without substantially reducing the solution's capacity to absorb acid gases. |
