Regenerative method for de-acidifying a gas containing co2...

Details Regenerative method for de-acidifying a gas containing co2... Regenerative method for de-acidifying a gas containing co2...

B - Operations, Transporting

01

D

B01D 53/14 (2006.01)

Patent

CA 2295707

The gas to be treated, containing CO2 and a certain amount of liquid hydrocarbons greater than 14 litres per 10<6> Nm<3> of gas, is put in an absorption zone consisting of an aqueous methyldiethanolamine and an activator consisting of an aminoalkylethanolamine, to produce a treated gas with reduced CO2 content and an absorbent liquid charged with CO2. Said absorbent liquid charged with CO2 is subjected to a regeneration treatment to release the CO2 it has fixed and produce a gas fraction rich in CO2 and a regenerated adsorbent liquid, which is recycled in the absorption zone. The invention is applicable to de-acidification, in particular, of natural gases containing CO2, liquid hydrocarbons and optionally H2S.

Le gaz à traiter, renfermant CO2 et une quantité d'hydrocarbures liquides supérieure à 14 litres par 10 6 Nm3 de gaz, est mis en contact, dans une zone d'absorption, avec un liquide absorbant constitué d'une solution aqueuse de méthyldiéthanolamine et d'un activateur consistant en une aminoalkyléthanolamine, pour produire un gaz traité à teneur réduite en CO2 et un liquide absorbant chargé de CO2. Ce liquide absorbant chargé est soumis à un traitement de régénération pour libérer le CO2 qu'il a fixé et produire une fraction gazeuse riche en CO2 et un liquide absorbant régénéré, qui est recyclé dans la zone d'absorption. Application à la désacidification, notamment, de gaz naturels contenant du CO2, des hydrocarbures liquides et éventuellement H2S.

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