CO2 Recovery And Cold Water Production Method

Abstract

The present invention relates to a method of capturing carbon dioxide in a fluid comprising at least one compound more volatile than carbon dioxide CO2, for example methane CH4, oxygen O2, argon Ar, nitrogen N2, carbon monoxide CO, helium He and/or hydrogen H2.

1 - 7 . (canceled) 
     
     
         8 . A method for producing chilled water, at least one CO2-lean gas and one or more CO2-rich primary fluids from a process fluid containing CO2 and at least one compound more volatile than CO2 and industrial water, comprising the following steps:
 a) separating said process fluid into at least said CO2-lean gas and said CO2-rich primary fluids; and   b) cooling said industrial water by exchange of heat with a non-zero fraction of said CO2-lean gas so as to obtain said chilled water;   
       wherein, in step b), said exchange of heat is performed in a direct-contact tower. 
     
     
         9 . The method of  claim 8 , further comprising c) exchanging heat between a non-zero fraction of said process fluid and a non-zero fraction of the chilled water produced in step b), thereby cooling said process fluid prior to its use in step a). 
     
     
         10 . The method of  claim 9 , wherein, in step c), said exchange of heat is by direct contact. 
     
     
         11 . The method of  claim 10  further comprising a step c0) cooling said process fluid, prior to being used in step c), by direct contact with a stream of water at a temperature higher than the wet-bulb temperature of the ambient air. 
     
     
         12 . The method of  claim 9 , further comprising a step b1) cooling the chilled water produced in step b) in a refrigerating unit prior to its use in step c). 
     
     
         13 . The method of  claim 9 , further comprising, a step c1) drying said process fluid in an adsorption unit and/or compression unit, subsequent to its use in step c) and prior to its use in step a). 
     
     
         14 . The method of  claim 8 , wherein step a) comprises of the following sub-steps:
 a1) a first cooling) of said process fluid by exchange of heat with no change in state;   a2) a second cooling of at least part of said process fluid cooled in step a) so as to obtain at least one solid containing predominantly CO2 and at least said CO2-lean gas; and   a3) a step comprising liquefaction and/or sublimation of at least part of said solid and making it possible to obtain said one or more CO2-rich primary fluids.