公开(公告)号：AU2010209661A1

公开(公告)日：2011-08-25

申请号：AU2010209661

申请日：2010-02-01

Applicant: BASF SE

Inventor： RAFAEL GARCIA ANDARCIA HUGO ,  UTE LICHTFERS ,  GEORG SIEDER ,  OLIVER SPUHL ,  STEVEN BRUGHMANS

IPC: B01D53/14

Abstract: The invention relates to an absorbent for removing acid gases from a fluid flow, comprising an aqueous solution A) of at least one cyclic amine compound having exclusively tertiary amine groups and/or sterically hindered secondary amine groups, and B) of at least one cyclic amine compound having at least one sterically unhindered secondary amine group. The absorbent comprises, for example, an aqueous solution of A) 1-hydroxyethyl-piperidine and/or triethylenediamine and B) piperazine. The absorbent is suited especially for separating carbon dioxide from flue gases and meets the following criteria: (i) sufficient capacity at low CO partial pressures; (ii) sufficiently fast absorption speed at low CO partial pressures; (iii) stability toward oxygen; (iv) low vapor pressure in order to reduce solvent losses; and (v) low energy requirement for regenerating the absorbent.