Method and device for reducing the carbon dioxide...

B - Operations – Transporting – 01 – D

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B01D 53/22 (2006.01) B01D 53/62 (2006.01)

Patent

CA 2527868

The invention relates to a method for reducing the carbon dioxide concentration in air of a closed or partially closed unit of space. The inventive method comprises the steps of removing an air flow from the unit of space, guiding the air flow in a membrane systems that contains at least one membrane module having a CO2/O2 selectivity of greater 2, removing the carbon dioxide permeated through the membrane, and returning the air flow that has been depleted of carbon dioxide in the membrane system to the unit of space. The inventive method can be optionally combined with an oxygen enrichment method. The invention also relates to corresponding devices for carrying out the inventive method.

L'invention concerne un procédé permettant de réduire la concentration en dioxyde de carbone de l'air se trouvant dans une unité de volume fermée ou partiellement fermée. Ce procédé comprend les étapes consistant : à prélever un courant d'air dans une unité de volume ; à guider ce courant d'air dans un système membranaire comportant au moins un module membranaire présentant une sélectivité CO¿2?/O¿2? supérieure à 2 ; à supprimer le dioxyde de carbone traversant la membrane, et ; à réintroduire, dans l'unité de volume, le courant d'air qui a été appauvri en dioxyde de carbone au sein du système membranaire. Le procédé selon l'invention peut éventuellement être combiné à un procédé d'enrichissement en oxygène. La présente invention se rapporte en outre à des dispositifs permettant de mettre en oeuvre le procédé selon l'invention.

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