Carbon dioxide capture

Details Carbon dioxide capture Carbon dioxide capture

B - Operations, Transporting

01

D

B01D 53/78 (2006.01) B01D 53/14 (2006.01) B01D 53/62 (2006.01)

Patent

CA 2728521

A method of carbon dioxide capture is disclosed. In a step (a) anhydrous sodium carbonate is separated from a first aqueous solution formed by reacting carbon dioxide and an aqueous solution of sodium hydroxide. In step (b) the anhydrous sodium carbonate is treated by causticization to generate carbon dioxide and sodium hydroxide. The first aqueous solution of step (a) is formed by scrubbing a gas containing carbon dioxide with an aqueous solution of sodium hydroxide.

L'invention concerne un procédé de capture de dioxyde de carbone. Au cours d'une étape (a) du carbonate de sodium anhydre est séparé d'une première solution aqueuse formée par réaction du dioxyde de carbone et d'une solution aqueuse d'hydroxyde de sodium. Au cours d'une étape (b) du carbonate de sodium anhydre est traité par caustification afin de produire du dioxyde de carbone et de l'hydroxyde de sodium. La première solution aqueuse de l'étape (a) est formée par épuration d'un gaz contenant du dioxyde de carbone avec une solution aqueuse d'hydroxyde de sodium.

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