Methods and apparatuses for decreasing the CO2 concentration of a fluid

• US 9,346,684 B2
• Filed: 08/21/2007
• Issued: 05/24/2016
• Est. Priority Date: 08/29/2006
• Status: Expired due to Fees

• Current Assignee: Yeda Research and Development Co. Ltd. (Weizmann Institute of Science)
• Original Assignee: Yeda Research and Development Co. Ltd. (Weizmann Institute of Science)
• Inventors: Katz, Robert, Berkowitz, Brian, Dror, Ishai
• Primary Examiner(s): HENDRICKSON, STUART L
• Application Number:
  US12/377,758
• Publication Number:
  US 20100258506A1
• Time in Patent Office: 3,199 Days
• US Class Current: 1/1
• CPC Class Codes: B01D 2251/404 of calcium
• CPC Class Codes: B01D 2252/1035 Sea water
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2258/06 Polluted air
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: C01B 32/60 Preparation of carbonates or bicarbonates in general of percarbonates C01B15/10; of specific carbonates or bicarbonates according to the cation C01B-C01G
• CPC Class Codes: C01F 11/181 Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
• CPC Class Codes: Y02C 20/40 of CO2
• CPC Class Codes: Y02P 20/151 Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Abstract

This invention is directed to decreasing the CO2 concentration. The invention makes use of fluids and apparatuses for diminishing CO2 concentrations of fluids.

Claims

1. A method of decreasing a CO₂ concentration of a fluid, the method comprising applying a flow of a first gas comprising trace amounts or no CO₂, and applying a second gas comprising CO₂ at a concentration of at least 0.1% v/v to fluid comprising;

a salt; and

a liquid;

wherein said liquid is an aqueous solution;

said first gas is air, nitrogen, argon, oxygen, CO, NO_x, SO_x, methane or any combination thereof;

said trace amounts of CO₂ is 0-0.04% v/v; and

whereby solid carbonate is formed in said fluid and the concentration of said CO₂ in said fluid is decreased.

2. The method of claim 1, wherein said first gas is air.

3. The method of claim 1, wherein said liquid is a natural body of water, wherein said natural body of water is a sea, brackish water, underground water reservoir, lake, river or an ocean.

4. The method of claim 1, wherein said fluid is at a basic pH.

5. The method of claim 4, wherein said pH in the region within 0.1-100 m of the introduction of the first gas is between 9-12.

6. The method of claim 1, wherein said liquid comprises effluent from a desalination plant.

7. The method of claim 1, wherein said second gas is an atmospheric air contaminated as a consequence of a man-made process or as a consequence of a natural process.

8. The method of claim 7, wherein said man-made process comprises burning of waste, plastics, polymers, hydrocarbons, carbonaceous materials, wood fossil fuels, coal, brown coal, naphtha, oil, gasoline, diesel fuels, kerosene, petroleum, liquefied petroleum gas (LPG), natural gas, bottled gas, methane, butane, propane, gasoline additives, ethanol, methanol, biodiesel, mono alkyl ester or combination thereof.

9. The method of claim 1, wherein second gas further comprises sulfur oxides whereby solid carbonate and solid sulfate are formed.

10. The method of claim 1, wherein said fluid further comprises sulfur oxides whereby solid sulfate and solid carbonate are formed.

11. The method of claim 1, wherein said first gas is applied prior to solubilization of said second gas.

12. The method of claim 1, wherein said first gas is applied subsequent to solubilization of said second gas.

13. The method of claim 1, wherein said salt comprises calcium ions, sodium ions, potassium ions, magnesium ions, barium ions, manganese ions, iron ions, strontium ions, zinc ions, aluminum ions, or any combination thereof.

14. The method of claim 1, wherein said second gas consists of pure CO₂.

15. The method of claim 1, wherein said fluid is a supersaturated aqueous solution of said CO₂.

16. A method of decreasing a CO₂ concentration of a fluid sample, consisting essentially of:

a. obtaining an aqueous solution of a calcium salt in basic conditions;

b. applying a flow of CO₂ to said aqueous solution;

c. forming a precipitate of solid calcium carbonate, while decreasing the concentration of CO₂ in said fluid sample;

d. maintaining said basic conditions to allow continuous precipitation of said calcium carbonate;

wherein said calcium salt is calcium chloride, calcium hydroxide, CaSO₄, or any combinations thereof.

17. The method of claim 16, wherein said flow of said CO₂ is at an ambient pressure.

18. The method of claim 16, wherein said basic conditions comprise the addition of a base, and said base comprises NH₃, NH₄OH, NaOH or lime water or any combination thereof.

19. The method of claim 18, wherein said NH₃ or NH₄OH are from man-made synthetic sources of ammonia, domestic or wild sources of bird guano, poultry farms, mineral deposits, bovine, porcine, ovine, equine urine or feces, fish farms, marine mammals, animal urine or animal manure or any combination thereof.

20. The method of claim 16, wherein said aqueous solution is formed with a natural body of water, wherein said natural body of water is a sea, brackish water, underground water reservoir, lake, river or an ocean.

21. The method of claim 16, wherein said aqueous solution is an effluent from a desalination plant.

22. The method of claim 16, wherein said flow of CO₂ is an atmospheric air contaminated as a consequence of a man-made process or as a consequence of a natural process.

23. The method of claim 22, wherein said man-made process comprises burning of waste, plastics, polymers, hydrocarbons, carbonaceous materials, wood fossil fuels, coal, brown coal, naphtha, oil, gasoline, diesel fuels, kerosene, petroleum, liquefied petroleum gas (LPG), natural gas, bottled gas, methane, butane, propane, gasoline additives, ethanol, methanol, biodiesel, mono alkyl ester or combination thereof.

24. The method of claim 16, wherein said flow of CO₂ consists of pure CO₂.

25. The method of claim 16, wherein said fluid is a supersaturated aqueous solution of said CO₂.

26. The method of claim 16, wherein said flow of CO₂ is a mixture of gases comprising CO₂.

27. The method of claim 26, wherein said mixture of gases is CO₂ enriched air.

28. A method of decreasing a CO₂ concentration of a fluid sample, consisting essentially of:

a. obtaining an aqueous solution of a calcium salt in basic conditions;

b. applying a flow of CO₂ to said aqueous solution;

c. adding additional said calcium salt to said mixture in step (b);

d. forming a precipitate of solid calcium carbonate, while decreasing the concentration of CO₂ in said fluid sample;

e. maintaining said basic conditions to allow continuous precipitation of said calcium carbonate;

wherein said calcium salt is calcium chloride, calcium hydroxide, CaSO₄, or any combinations thereof.

29. A method of decreasing a CO₂, concentration of a fluid sample, consisting essentially of:

a. obtaining an aqueous solution of a calcium salt in basic conditions;

b. applying a flow of CO₂ and sulfur oxides to said aqueous solution;

c. forming a precipitate of solid calcium carbonate and solid sulfate, while decreasing the concentration of CO₂ in said fluid sample;

d. maintaining said basic conditions to allow continuous precipitation of said calcium carbonate;

wherein said calcium salt is calcium chloride, calcium hydroxide, CaSO₄, or any combinations thereof.

30. A method of decreasing a CO₂ concentration of a fluid sample, consisting essentially of:

a. obtaining an aqueous solution of a calcium salt and sulfur oxides basic conditions;

b. applying a flow of CO₂ to said aqueous solution;

c. forming a precipitate of solid calcium carbonate and solid sulfate, while decreasing the concentration of CO₂ in said fluid sample;

d. maintaining said basic conditions to allow continuous precipitation of said calcium carbonate;

wherein said calcium salt is calcium chloride, calcium hydroxide, CaSO₄, or any combinations thereof.

31. A method of decreasing a CO₂ concentration of a fluid sample, consisting essentially of:

a. obtaining an aqueous solution of a calcium salt and sodium ions, potassium ions, magnesium ions, barium ions, manganese ions, iron ions, strontium ions, zinc ions, aluminum ions, or any combination thereof in basic conditions;

b. applying a flow of CO₂ to said aqueous solution;

c. forming a precipitate of solid calcium carbonate and solid sulfate, while decreasing the concentration of CO₂ in said fluid sample;

d. maintaining said basic conditions to allow continuous precipitation of said calcium carbonate;

wherein said calcium salt is calcium chloride, calcium hydroxide, CaSO₄, or any combinations thereof.

32. A method of decreasing a CO₂ concentration of a fluid sample, consisting essentially of:

a. obtaining an aqueous solution of a calcium salt in basic conditions, wherein the pH of said aqueous solution is between 9-12;

b. applying a flow of CO₂ to said aqueous solution;

c. forming a precipitate of solid calcium carbonate, while decreasing the concentration of CO₂ in said fluid sample;

d. maintaining said basic conditions to allow continuous precipitation of said calcium carbonate;

whereby said pH enhances the yield of solid calcium carbonate precipitation, and whereby said calcium salt is calcium chloride, calcium hydroxide, CaSO₄, or any combinations thereof.

33. The method of claim 32, wherein said flow of CO₂ is a mixture of gases.

34. The method of claim 33, wherein said mixture of gases is CO₂ enriched air.

35. A method of decreasing a CO₂ concentration of a fluid sample, consisting essentially of:

a. obtaining an aqueous solution of a calcium salt in basic conditions, wherein the pH of said aqueous solution is at least at pH 10;

b. applying a flow of CO₂ to said aqueous solution;

c. forming a precipitate of solid calcium carbonate, while decreasing the concentration of CO₂ in said fluid sample;

d. maintaining said basic conditions to allow continuous precipitation of said calcium carbonate;

whereby said pH enhances the yield of solid calcium carbonate precipitation, and wherein said calcium salt is calcium chloride, calcium hydroxide, CaSO₄, or any combinations thereof.

36. The method of claim 35, wherein said flow of CO₂ is a mixture of gases.

37. The method of claim 36, wherein said mixture of gases is CO₂ enriched air.