COMPOSITION OF ABSORBENT AND METHOD FOR REMOVING CO2 AND / OR H2C FROM A GAS CONTAINING CO2 AND / OR H2C

摘要

1. An absorbent composition for removing CO and / or HS from a gas containing CO and / or HS, including polyamine, monoamine and water, in which the polyamine contains a polyamine with 3-5 functional amino groups and a molecular weight of less than 200 g / mol; monoamine contains a tertiary monoamine ; and the weight ratio of polyamine with 3-5 functional amino groups to tertiary monoamine is more than 1: 1.2. An absorbent composition according to claim 1, wherein the 3-5 amino functional polyamine is a 3-5 amino functional non-cyclic polyamine and / or the tertiary monoamine is a non-cyclic tertiary monoamine. An absorbent composition according to claim 1 or 2, in which the polyamine contains a polyamine with 3-4 amino functional groups. An absorbent composition according to claim 1 or 2, wherein the total percentage of polyamine and monoamine is less than or equal to 70 wt% based on the total weight of the absorbent composition. The absorbent composition according to claim 1 or 2, in which the polyamine with 3-5 amino functional groups is a polyamine of the formula I: where each R1 independently represents a substituted or unsubstituted alkylene group containing 1-6 carbon atoms; each R2 independently represents hydrogen or a hydrocarbon group containing 1-12 carbon atoms; and where x can be 1, 2, or 3.6. An absorbent composition according to claim 1 or 2, wherein the polyamine comprises diethylenetriamine, dimethylaminopropylaminopropylamine, or a combination thereof. An absorbent composition according to claim 1 or 2, wherein the tertiary monoamine is a monoamine of Formula II: wherein each R3 independently may represent a hydrocarbon group containing 1-6 carbon atoms. An absorbent composition according to claim 1 or 2, in which