LIQUID-PHASE GAS COLLECTION

• US 20110159575A1
• Filed: 03/09/2009
• Published: 06/30/2011
• Est. Priority Date: 03/14/2008
• Status: Abandoned Application

• Current Assignee: Endesa Generacion SA (ENEL SPA)
• Original Assignee: Endesa Generacion SA (ENEL SPA)
• Inventors: Molina Grima, Emilio, Llamas Moya, Bernardo, Fernández Sevilla, José María, Acién Fernández, Francisco Gabriel, González López, Cynthia Victoria, Ballesteros Aparicio, Juan Carlos
• Application Number:
  US12/996,056
• Publication Number:
  US 20110159575A1
• Time in Patent Office: Days
• US Class Current: 435/266
• CPC Class Codes: B01D 2251/304 of sodium
• CPC Class Codes: B01D 2251/606 Carbonates
• CPC Class Codes: B01D 2257/302 Sulfur oxides
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: B01D 53/77 Liquid phase processes
• CPC Class Codes: B01D 53/96 Regeneration, reactivation or recycling of reactants
• CPC Class Codes: C12F 3/02 of carbon dioxide
• CPC Class Codes: C12N 1/12 Unicellular algae; Culture media therefor as new plants A01H13/00
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

A method for collecting combustion gases by (a) contacting a liquid phase with a gas flow containing said gases, where the liquid phase contains carbonate/bicarbonate buffer salts in a ratio of around 2:1, with a total inorganic carbon concentration no higher than 25 g/L and pH values between 8 and 12; and (b) recovering the CO2-rich liquid phase produced in step (a).

Claims

1. Process for capturing combustion gases, which comprises:

a. Placing a liquid phase in contact with a gas stream containing said gases, wherein the liquid phase contains carbonate-bicarbonate buffer salts in an approximate 2;

1 ratio, with a total concentration of inorganic carbon less than or equal to 25 g/l and pH values ranging between 8 and 12, and

b. recovering the CO₂-enriched liquid phase obtained in step a).

2. Process according to claim 1, wherein the concentration of inorganic carbon has values ranging between 2 and 12 g/l.

3. Process according to claim 1, wherein the concentration of inorganic carbon has values ranging between 3 and 6 g/l.

4. Process according to claim 1, wherein the pH has values ranging between 9 and 11.

5. Process according to claim 1, wherein step b) is performed by introducing the gas-enriched liquid phase into a photobioreactor.

6. Process according to claim 1, wherein the photobioreactor is a flat-plate bioreactor.

7. Process according to claim 5, wherein the photosynthetic organism in the photobioreactor is a cyanobacterium or a green alga.

8. Process according to claim 7, wherein the photosynthetic organism is a cyanobacterium.

9. Process according to claim 1, wherein the pollutant gases are obtained from the combustion of fossil fuels.

10. Process according to claim 1, wherein the pollutant gases come from electrical energy generation plants.