Method for removing carbon dioxide from gases

Details Method for removing carbon dioxide from gases Method for removing carbon dioxide from gases

B - Operations, Transporting

01

D

B01D 53/62 (2006.01) B01D 53/14 (2006.01) B01D 53/22 (2006.01) C10L 3/10 (2006.01)

Patent

CA 2261819

A method for removing and preventing discharge into the atmosphere of carbon dioxide from combustion gases and natural gas from installations for production of oil and/or gas, wherein the combustion gas is passed to an absorber containing a solvent, where carbon dioxide is absorbed in the said solvent, and the thereby purified combustion gas, largely free of carbon dioxide, is released into the atmosphere, where the CO2-rich solvent is passed to a desorber where CO2 is removed from the solvent, and the thereby largely CO2-free solvent is recycled to the absorber, and the separated CO2 gas is passed to a compression stage for compression and utilization and/or disposal in a suitable manner, where membrane gas/liquid contactors are employed in both the absorber and the desorber, and that an external stripping steam is supplied to the desorber.

Procédé permettant d'éliminer le dioxyde de carbone et d'empêcher son évacuation dans l'atmosphère à partir des gaz de combustion et du gaz naturel provenant d'installations de production de pétrole et/ou de gaz. Selon le procédé, on fait passer le gaz de combustion dans un absorbeur contenant un solvant, au niveau duquel le dioxyde de carbone est absorbé dans ledit solvant, et on évacue le gaz de combustion ainsi purifié, pratiquement dépourvu de dioxyde de carbone, dans l'atmosphère. On fait passer le solvant lourd contenant le CO2 dans un désorbeur, au niveau duquel le CO2 est éliminé du solvant, et on renvoie le solvant pratiquement dépourvu de CO2 dans l'absorbeur. On fait passer le CO2 gazeux séparé dans un étage de compression, afin de le comprimer et de l'utiliser et/ou de le rejeter d'une manière convenable. On emploie des contacteurs gaz/liquide à membrane aussi bien dans l'absorbeur que dans le désorbeur, et on amène au désorbeur une vapeur de stripping externe.

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