Regenerable battery for electricity generation from gas separation process or captured carbon dioxide

Abstract

The invention pertains to processes for separating gases, acid gas, hydrocarbons, air gases, or combinations thereof. The processes may employ using a liquid phase cloud point with or without subsequent liquid-liquid separation. In some embodiments membranes can be employed with reverse osmosis to regenerate a solvent and/or an antisolvent. In some embodiments thermal switching phase changes may be employed during absorption or desorption to facilitate separation.

What is claimed is: 
     
         1 . A method of generating electricity from a carbon capture process comprising:
 reacting a compound with a metal to form a complex cation solution at an anode electrode;   decomposing the complex cation solution to deposit a metal at a cathode electrode; and   connecting the electrodes to generate electricity;   
       wherein the complex cation solution comprises captured carbon dioxide. 
     
     
         2 . The method of  claim 1  wherein the electrodes are selected from the group consisting of:
 copper, zinc, nickel, silver, lead, and cobalt. 
 
     
     
         3 . The method of  claim 1  wherein the complex cation solution comprises monoethanolamine, methylamine, dimethylamine, trimethylamine, or a mixture thereof. 
     
     
         4 . The method of  claim 1  wherein the electrodes are periodically swapped. 
     
     
         5 . The method of  claim 1  wherein the process further comprises employing a membrane. 
     
     
         6 . The method of  claim 5  wherein the membrane is selected from the group consisting of semi-permeable membranes, pressure retarded osmosis membranes, forward osmosis membranes, anion exchange membranes (AEM), and cation exchange membranes (CEM). 
     
     
         7 . The method of  claim 1  further comprising capturing carbon dioxide from combustion, oxidation, steam reforming, a gas shift reaction, catalytic reforming, natural gas purification, land fill gas, biogas, waste water treatment, fermentation, respiration, air, or from a mixture thereof. 
     
     
         8 . The method of  claim 1  further comprising using the electricity generated to produce a compound comprising nitrogen. 
     
     
         9 . The method of  claim 8  wherein the compound comprising nitrogen is ammonium carbamate, urea, cyanuric acid, or a derivative thereof. 
     
     
         10 . The method of  claim 1  further comprising desorbing carbon dioxide from the complex cation solution. 
     
     
         11 . The method of  claim 1  wherein the cathode electrode and anode electrode are located across a heat exchanger. 
     
     
         12 . The method of  claim 1  wherein the process further comprises employing a pressure retarded osmosis membrane prior to the step of reacting ammonia or an ammonium compound with a metal to form a complex cation solution at an anode electrode. 
     
     
         13 . The method of  claim 1  wherein the process further comprises employing a pressure retarded osmosis membrane subsequent to the step of reacting ammonia or an ammonium compound with a metal to form a complex cation solution at an anode electrode. 
     
     
         14 . The method of  claim 1  further comprising heating the complex cation solution. 
     
     
         15 . The method of  claim 1  wherein the electrodes are copper. 
     
     
         16 . The method of  claim 1  wherein the electrodes are connected with a wire to generate electricity. 
     
     
         17 . The method of  claim 1  wherein the complex cation solution comprises an ammonium solution. 
     
     
         18 . A battery comprising:
 an anode electrode;   a cathode electrode;   a wire connecting the anode electrode and cathode electrode;   a complex cation solution comprising captured carbon dioxide wherein said complex cation solution is capable of being decomposed at the cathode electrode.   
     
     
         19 . The battery of  claim 18  wherein the metal is copper. 
     
     
         20 . The battery of  claim 18  wherein the complex cation solution comprises monoethanolamine, methylamine, dimethylamine, trimethylamine, or a mixture thereof.