THREE-COMPONENT ABSORBENT, AND DEVICE AND METHOD FOR REMOVING CO2 AND/OR H2S

摘要

1) A first amine, which is a straight chain secondary monoamine, 2) a second amine, which is a cyclic secondary polyamine as a reaction accelerator, and 3) a third amine, which is an amine consisting of one selected from a cyclic amine group constituted from a secondary or tertiary amino group or a straight chain amine group with high steric hindrance are mixed to obtain an absorbent. By the synergistic effect thereof, absorption properties to CO2 and/or H2S are excellent and the absorbed CO2 or H2S emission properties during the regeneration of the absorbent become excellent. Therefore, the water vapor amount used during the regeneration of the absorbent in CO2 recovery equipment can be reduced.

主权项

1. A three-component absorbent for absorbing CO2 and/or H2S in gas, comprising:
1) a straight chain secondary monoamine, 2) a cyclic secondary polyamine, and 3) at least one amine selected from
a) a cyclic amine group constituted from a secondary or tertiary amino group orb) a straight chain amine group with high steric hindrance, wherein the three-component absorbent is dissolved in water, wherein 3)a) the cyclic amine is a piperazine derivative and is selected from an amine group in which the number of carbons in an exocyclic substituent is one and wherein 3)a) the cyclic amine is selected from 1-methylpiperazine or 2-methylpiperazine and different from a piperazine derivative of 2) the cyclic secondary polyamine.