Process and system for removing carbon dioxide from...

B - Operations – Transporting – 01 – D

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B01D 53/62 (2006.01) B01D 53/14 (2006.01) B01D 53/18 (2006.01) C01B 31/20 (2006.01)

Patent

CA 2639953

A method and system of separating carbon dioxide from flue gas is introduced. Instead of relying on large temperature or pressure changes to remove carbon dioxide from a solvent used to absorb it from flue gas, the ion pump method, as disclosed herein, dramatically increases the concentration of dissolved carbonate ion in solution. This increases the overlying vapor pressure of carbon dioxide gas, permitting carbon dioxide to be removed from the downstream side of the ion pump as a pure gas . The ion pumping may be obtained from reverse osmosis, electrodialysis, thermal desalination methods, or an ion pump system having an oscillating flow in synchronization with an induced electric field.

L'invention concerne un procédé et un système nouveaux de séparation de dioxyde de carbone du gaz de carneau. Au lieu de reposer sur des changements de température ou de pression importants pour éliminer le dioxyde de carbone d'un solvant utilisé pour l'absorber à partir du gaz de carneau, le procédé de pompage ionique selon l'invention consiste à augmenter considérablement la concentration d'ions carbonates dissous dans une solution. Ceci augmente la pression de vapeur sus-jacente du gaz de dioxyde de carbone, permettant au dioxyde de carbone d'être éliminé du côté aval de la pompe ionique sous forme de gaz pur. Le pompage ionique peut être obtenu par des procédés de dessalement par osmose inverse, par électrodialyse, thermique, ou par un système de pompe ionique présentant un flux oscillant synchronisé avec un champ électrique induit.

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