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.
通过将气体混合物与吸收介质(包括
水和5至50重量%的
氨基酸盐,
化学式为R1R2CHNHCH2COOK,其中R1和R2是n-烷基基团,且R1和R2基团共有2至4个碳原子)接触,吸收
CO2从气体混合物中。在吸收和解吸的循环操作中,每单位重量的吸收容量较高。