C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 31/00 (2006.01) B01J 37/03 (2006.01) B01J 37/08 (2006.01) F25J 3/08 (2006.01)
Patent
CA 2618405
A first contaminant selected from oxygen and carbon monoxide is removed from impure liquid carbon dioxide using a mass transfer separation column system which is reboiled by indirect heat exchange against crude carbon dioxide fluid, the impure liquid carbon dioxide having a greater concentration of carbon dioxide than the crude carbon dioxide fluid. The invention has particular application in the recovery of carbon dioxide from flue gas generated in an oxyfuel combustion process or waste gas from a hydrogen PSA process. Advantages include reducing the level of the first contaminant to not more than 1000 ppm.
Un premier contaminant, l'oxygène ou le monoxyde de carbone, est retiré de dioxyde de carbone liquide impur à l'aide d'un système sur colonne de séparation par transfert de masse remis en ébullition par échange thermique indirect avec un fluide de dioxyde de carbone brut, le dioxyde de carbone impur ayant une plus grande concentration en dioxyde de carbone que le fluide de dioxyde de carbone brut. L'invention a une application particulière pour la récupération du dioxyde de carbone des gaz effluents d'un procédé de combustion d'oxygaz ou des gaz résiduaires d'un procédé d'AMP d'hydrogène. Parmi les avantages figure la réduction de la concentration du premier contaminant jusqu'à une valeur d'au plus 1 000 ppm.
Allam Rodney John
White Vincent
Air Products And Chemicals Inc.
Mcfadden Fincham
LandOfFree
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