Patent ID: 8398749

Claim:
A process for the recovery of carbon dioxide, comprising: a) an absorption step of bringing a carbon dioxide-containing gaseous feed stream into gas-liquid contact with an absorbing fluid, whereby at least a portion of the carbon dioxide present in the gaseous stream is absorbed into the absorbing fluid to produce (i) a refined gaseous stream having a reduced carbon dioxide content and (ii) a carbon dioxide-rich absorbing fluid, and b) a regeneration step of treating the carbon dioxide-rich absorbing fluid at a pressure of greater than 3 bar (absolute pressure) so as to liberate carbon dioxide and regenerate a carbon dioxide-lean absorbing fluid which is recycled for use in the absorption step, wherein the absorbing fluid is an aqueous amine solution containing a tertiary aliphatic alkanol amine selected from the group consisting of N-ethyldiethanolamine, 2-(diethylamino)-ethanol, 3-(dimethylamino)-1-propanol and 3-(diethylamino)-1-propanol, and an effective amount of a carbon dioxide absorption promoter, wherein the carbon dioxide absorption promoter is selected from the group consisting of: piperazine, 2-methylpiperazine, N-methylpiperazine, N-ethylpiperazine, N-hydroxyethyl piperazine, homopiperazine, piperidine, and morpholine.