F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/00 (2006.01)
Patent
CA 2587182
A method of separating first light component(s) from a carbon dioxide containing gaseous mixture that contains at least 30 mole percent carbon dioxide. In accordance with the method, a feed stream (10) composed of the carbon dioxide is cooled to effect at least in part, liquefaction of the carbon dioxide containing gaseous mixture. The feed stream and a stripping gas stream (20) are introduced into a liquid-vapor contact column (18) to initiate counter-current vapor liquid mass transfer and the formation of a gaseous column overhead stream (20) and a liquid column bottoms stream (24). The stripping gas stream (20) contains one or more second light component(s) having boiling point lower than that of carbon dioxide and higher than that of the first light component(s) to enrich the gaseous column overhead stream (22) with the first light component(s).
L'invention concerne un procédé permettant de séparer un ou des premiers composants légers d'un mélange gazeux contenant du dioxyde de carbone qui contient au moins 30 % molaire de dioxyde de carbone. Selon le procédé de l'invention, un flux d'entrée (10) composé de dioxyde de carbone est refroidi afin d'assurer au moins partiellement la liquéfaction du mélange gazeux contenant du dioxyde de carbone. Le flux d'entrée et un flux de gaz de strippage (20) sont introduits dans une colonne de contact liquide-vapeur (18) afin d'initier le transfert vapeur-masse liquide à contre-courant et la formation d'un flux de tête gazeux de colonne (20) et d'un flux de fond liquide de colonne (24). Le flux de gaz de strippage (20) contient un ou plusieurs deuxièmes composants légers dont le point d'ébullition est inférieur à celui du dioxyde de carbone et supérieur à celui du ou des premiers composants légers qui permettent d'enrichir le flux de tête gazeux de colonne (22) avec le ou les premiers composants légers.
Praxair Technology Inc.
Sim & Mcburney
LandOfFree
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