Carbon dioxide capture and related processes

B - Operations – Transporting – 01 – D

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B01D 53/62 (2006.01)

Patent

CA 2669964

Processes for capturing carbon dioxide are described. The carbon dioxide may be captured from the atmosphere and/or from the waste stream of a carbon dioxide point source (e.g., power plants, chemical plants, natural gas fields, oil fields, industrial sites, etc.). The processes can involve capturing carbon dioxide using alkaline solutions (e.g., NaOH). In some processes, the carbon dioxide may react with the alkaline solution to form a product (e.g., NaHCO3). The alkaline solution may be made a number of different ways. In some of the processes, products produced during processing may be used to add value beyond carbon dioxide capture.

La présente invention concerne des procédés permettant de capturer du dioxyde de carbone. Le dioxyde de carbone peut être capturé depuis l'atmosphère et/ou un courant résiduaire d'une source ponctuelle de dioxyde de carbone (par exemple, des centrales électriques, des usines chimiques, des champs de gaz naturel, des champs pétrolifères, des sites industriels, entre autres). Les procédés peuvent impliquer la capture du dioxyde de carbone au moyen de solutions alcalines (notamment NaOH). Dans certains procédés, le dioxyde de carbone peut réagir avec la solution alcaline pour former un produit (notamment NaHCO3). La solution alcaline peut être élaborée de différentes manières. Dans certains des procédés, les produits générés durant le traitement peuvent être utilisés pour apporter une valeur ajoutée au-delà de capture du dioxyde de carbone.

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