Method for Efficient CO2 Degasification

Abstract

A system includes a first desorption unit comprising a first input coupled to a dissolved inorganic carbon (“DIC”) solution source and a second input coupled to a vacuum source, the first desorption unit is operable to remove carbon dioxide gas from an acidified solution from the DIC solution source and comprises a solution output. A second desorption unit in the system comprises a first input coupled to the solution output from the first desorption unit and a second input coupled to a sweep gas source, the second desorption unit is operable to remove carbon dioxide gas from the solution output from the first desorption unit.

What is claimed is: 
     
         1 . A system comprising:
 a first desorption unit comprising a first input coupled to a dissolved inorganic carbon (“DIC”) solution source and a second input coupled to a vacuum source, the first desorption unit operable to remove carbon dioxide gas from an acidified solution from the DIC solution source and comprising a solution output; and   a second desorption unit comprising a first input coupled to the solution output from the first desorption unit and a second input coupled to a sweep gas source, the second desorption unit operable to remove carbon dioxide gas from the solution output from the first desorption unit.   
     
     
         2 . The system of  claim 1 , further comprising a collection vessel coupled to a gas outlet of the first desorption unit and a gas outlet of the second desorption unit. 
     
     
         3 . The system of  claim 1 , wherein the sweep gas source comprises at least one of carbon monoxide or hydrogen. 
     
     
         4 . The system of  claim 1 , further comprising an electrodialysis unit comprising an acid solution output, the acid solution output coupled to the DIC solution source at a point upstream of the first desorption unit. 
     
     
         5 . The system of  claim 1 , wherein the electrodialysis unit comprises an input coupled to the DIC solution source. 
     
     
         6 . The system of  claim 1 , wherein the DIC solution source comprises a seawater solution. 
     
     
         7 . The system of  claim 1 , wherein the DIC solution source comprises a brine output from a desalination operation.