公开(公告)号：AU2007260028B2

公开(公告)日：2011-09-08

申请号：AU2007260028

申请日：2007-06-13

Applicant: BASF SE

Inventor： NORBERT ASPRION ,  UTE LICHTFERS ,  IVEN CLAUSEN

IPC: B01D53/14

Abstract: A process is described for removing carbon dioxide from gas streams in which the partial pressure of the carbon dioxide is less than 200 mbar, in particular flue gases, wherein the gas stream is brought into contact with a liquid absorption medium which comprises an aqueous solution (A) of a tertiary aliphatic alkanolamine and (B) of an activator of the general formula R-NH-R-NH, wherein R is C-C-alkyl and R is C-C-alkylene, wherein the sum of the concentrations of A and B is 2.5 to 7 mol/l and the molar ratio of B to A is in the range from 1:3 to 1.5:1. The activator is, for example, 3-methylaminopropylamine, the tertiary aliphatic amine methyldiethanolamine, methyldiisopropanolamine or n-butyldiethanolamine. The process permits a substantial removal of carbon dioxide and regeneration of the absorption medium is possible with a comparatively low energy consumption.