Abstract:
PROBLEM TO BE SOLVED: To provide an absorbing medium maintaining absorbing capacity over a long term, and to deacidify fluid streams. SOLUTION: This absorption medium contains at least one aliphatic amine and at least one non-hydroquinoid antioxidant. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
Disclosed is an absorbent for eliminating carbon dioxide from a gas flow. Said absorbent comprises an aqueous solution of at least one amine and at least one amino carboxylic acid and/or amino sulfonic acid. Additionally using an amino carboxylic acid or amino sulfonic acid reduces the amount of energy required for regenerating the absorbent.
Abstract:
A description is given of an absorption medium for removing carbon dioxide from gas streams which comprises aqueous solution of an amine of the formula I HNR2 (I) where one or both radicals R are and the other radical R is hydrogen. The absorption medium is distinguished by particular oxidation resistance.
Abstract:
A description is given of an absorption medium for deacidifying fluid streams which has improved oxidation stability and comprises at least one aliphatic amine, in particular an alkanolamine, and at least one non-hydroquinoid antioxidant. The absorption medium serves for deacidifying a fluid stream, in particular an oxygen-containing fluid stream, the fluid stream being brought into intimate contact with the absorption medium in at least one absorption step.
Abstract:
A description is given of an absorption medium for removing carbon dioxide from a gas stream, which comprises an aqueous solution of at least one amine and at least one aminocarboxylic acid and/or aminosulfonic acid. The concomitant use of an aminocarboxylic acid or aminosulfonic acid reduces the energy required for regeneration of the absorption medium.
Abstract:
A description is given of an absorption medium for removing carbon dioxide from gas streams which comprises aqueous solution of an amine of the formula I HNR2 (I) where one or both radicals R are and the other radical R is hydrogen. The absorption medium is distinguished by particular oxidation resistance.
Abstract:
Deacidifying a fluid stream comprises absorbing acid gases in an absorbent comprising 0.3-60 wt.% of a polyamine (I) with at least two primary, secondary or tertiaryl amino groups and a molecular weight above 200, 0.1-70 wt.% or an aliphatic or alicyclic amine (II) with a molecular weight of 200 or less, and optionally 1-90 wt.% water. An independent claim is also included for an absorbent as above.
Abstract:
The invention relates to a method for the removal of carbon dioxide from a gas flow, in which the partial pressure of the carbon dioxide in the gas flow is less than 200 mbar, whereby the gas flow is brought into contact with a liquid absorption agent, comprising an aqueous solution (A) of a tertiary aliphatic amine and (B) an activator of general formula R 1 -NH-R 2 -NH 2 , where R 1 =C 1 -C 6 alkyl and R 2 =C 2 -C 6 alkylene. The method is particularly suitable for treatment of flue gases and also relates to an absorption agent.
Abstract:
The invention relates to a method for the removal of carbon dioxide from a gas flow with a carbon dioxide partial pressure in the gas flow of less than 200 mbar, whereby the gas flow is brought into contact with a liquid absorption agent, selected from an aqueous solution (A) of an amino compound with at least two tertiary amino groups in the molecule and (B) an activator, selected from the primary and secondary amines, or (A) a tertiary aliphatic amine, the reaction enthalpy .DELTA.R H for the protonation of which is greater than that for methyldiethanolamine and (B) an activator, selected from 3-methylaminopropylamine, piperazine, 2-methylpiperazine, N-methylpiperazine, homopiperazine, piperidine and morpholine. The method is particularly suitable for the treatment of flue gases and also relates to an absorption agent.