Method and system for extracting carbon dioxide by...

F - Mech Eng,Light,Heat,Weapons – 25 – J

Patent

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F25J 3/02 (2006.01) B01D 7/02 (2006.01) B01D 53/00 (2006.01) C01B 31/22 (2006.01) F17C 9/00 (2006.01)

Patent

CA 2731480

A method for removal of CO2 from a gas stream by anti-sublimation, comprising the steps of: a) introducing a gas stream containing CO2 into a frosting vessel; b) reducing the temperature of at least a portion of the gas stream in said frosting vessel to a temperature at which solid CO2 is deposited by anti-sublimation; c) discharging the gas stream depleted of CO2 from the frosting vessel; and d) recovering the deposited solid CO2; wherein the pressure of the gas stream in step b) is higher than atmospheric pressure. An anti-sublimation system for removal of CO2 from a gas stream, comprising: a frosting vessel (101) configured to receive the gas stream, said frosting vessel comprising a low temperature refrigeration device (107) configured for reducing the temperature of at least a portion of a gas stream in said frosting vessel to a temperature at which solid CO2 is deposited by anti-sub-limation; and a compressor (108) configured to increase the gas pressure of the gas stream which is fed to the frosting vessel.

La présente invention concerne un procédé pour lélimination de CO2 à partir dun flux gazeux par anti-sublimation, comprenant les étapes suivantes: a) lintroduction dun flux gazeux contenant du CO2 dans une cuve de givrage; b) la réduction de la température dau moins une partie du flux gazeux dans ladite cuve de givrage à une température à laquelle le CO2 solide est déposé par anti-sublimation; c) lévacuation du flux gazeux appauvri en CO2 depuis la cuve de givrage; et d) la récupération du CO2 solide déposé, la pression du flux gazeux à létape b) étant supérieure à la pression atmosphérique. Linvention concerne également un système danti-sublimation pour lélimination de CO2 à partir dun flux gazeux comportant : une cuve de givrage (101) configurée pour recevoir le flux gazeux, ladite cuve de givrage comprenant une dispositif de réfrigération à basse température (107) configuré pour réduire la température dau moins une partie du flux gazeux dans ladite cuve de givrage à une température à laquelle le CO2 solide est déposé par anti-sublimation; et un compresseur (108) configuré pour accroître la pression de gaz du flux gazeux qui est alimenté à la cuve de givrage.

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