AQUEOUS CO2 ABSORBENT COMPRISING 2-AMINO-2-METHYL-1-PROPANOL AND 3-AMINOPROPANOL OR 2-AMINO-2-METHYL-1-PROPANOL AND 4-AMINOBUTANOL
An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described.
1 - 9 . (canceled)
10 . A method for separating CO2 from a CO2 containing gas, where the CO 2 is captured by countercurrent flow to an absorbent in an absorber to give a CO 2 lean flue gas that is released into the surroundings, and a CO 2 rich absorbent that is regenerated in a regeneration column, by adding heat, to give a CO 2 rich gas that is treated further, and regenerated CO2 lean absorbent that is recycled to the absorber for reuse, wherein the circulating CO2 absorbent is an aqueous CO2 absorbent comprising:
2-amino-2-methyl-1-propanol (AMP); and
one of:
3-aminopropanol (AP); and
4-aminobutanol (AB).
11 . The method according to claim 10 , wherein the concentration of AMP is from 10 to 35% by weight and the concentration of AP or AB is from 10 to 40% by weight.
12 . The method according to claim 10 , wherein the concentration of AMP is from 20 to 35% by weight.
13 . The method according to claim 10 , wherein the concentration of AMP is from 25 to 35% by weight.
14 . The method according to claim 10 , wherein the concentration of AMP is from 30 to 35% by weight.
15 . The method according to claim 10 , wherein the concentration of AP or AB is from 20 to 40% by weight.
16 . The method according to claim 10 , wherein the concentration of AP or AB is from 25 to 40% by weight.
17 . The method according to claim 10 , wherein the concentration of AP or AB is from 30 to 40% by weight.
18 . The method according to claim 10 , wherein the absorbent comprises a combination of AMP and AP.
19 . The method according to claim 18 , wherein the concentration of AMP is from 10 to 35% by weight and the concentration of AP is from 10 to 40% by weight.
20 . The method according to claim 18 , wherein the concentration of AMP is from 20 to 35% by weight.
21 . The method according to claim 18 , wherein the concentration of AMP is from 25 to 35% by weight.
22 . The method according to claim 18 , wherein the concentration of AMP is from 30 to 35% by weight.
23 . The method according to claim 18 , wherein the concentration of AP is from 20 to 40% by weight.
24 . The method according to claim 18 , wherein the concentration of AP is from 25 to 40% by weight.
25 . The method according to claim 18 , wherein the concentration of AP is from 30 to 40% by weight.
26 . The method according to claim 10 , wherein the CO2 containing gas is brought in countercurrent flow to the CO2 absorbent in an absorber to give a CO2 depleted gas that is released into the surroundings, and a CO2 rich absorbent that is collected in the bottom of the absorber, regenerated and recycled into the absorber.
27 . The method according to claim 10 , wherein the CO2 containing gas is an exhaust gas from a thermal power plant or an industrial plant.