Systems and methods for removal and sequestration of acidity from surface seawater

Patent metadata

Field	Value
Publication number	US-11939247-B2
Application number	US-202217972502-A
Country	US
Kind code	B2
Filing date	Oct 24, 2022
Priority date	Oct 26, 2021
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A method by which an environmental energy (e.g., wave energy) is harvested, converted into electrical power, and thereafter used to electrolyze seawater into hydrogen and chlorine gases. Those gases are recombined into hydrogen chloride from which is formed hydrochloric acid solution which is diluted and deposited at a depth sufficient to ensure its neutralization and sequestration for a significant period of time (e.g., for over a millennium). By removing chloride ions from a portion of the sea adjacent to its upper surface and depositing them into a portion of the sea more adjacent to its bottom, acidity is shifted from the surface to base of the sea, and the surface ocean is given a greater ability to absorb and buffer atmospheric carbon dioxide without a corresponding increase in acidity.

First claim

We claim:

1. A method for increasing a depth of acidity in a body of seawater, comprising:
directing a flow of seawater from a first depth of the body of seawater through an electrolyzer configured to establish an electrical potential between a cathode and an anode, the flow of seawater passing through an anodic chamber and then a cathodic chamber;
transmitting electrical energy to the electrolyzer;
capturing hydrogen gas produced within the electrolyzer at the cathode;
capturing chlorine gas produced within the electrolyzer at the anode;
mixing the hydrogen gas and chlorine gas;
reacting the hydrogen gas and chlorine gas to produce a hydrogen chloride gas;
transferring the hydrogen chloride gas to a free surface of a water reservoir contained within an acid resistant chamber to produce a hydrochloric acid solution; and,
transferring the hydrochloric acid solution to a second depth of the body of seawater below said first depth.

2. The method of claim 1 , wherein the electrolyzer includes a semipermeable diaphragm to separate the cathodic chamber within the electrolyzer from the anodic chamber within the electrolyzer.

3. The method of claim 1 , wherein the electrolyzer includes an ion-permeable membrane that separates the cathodic chamber within the electrolyzer from the anodic chamber within the electrolyzer.

4. The method of claim 1 , further comprising transmitting the electrical energy to the electrolyzer as a direct electrical current.

5. The method of claim 1 , further comprising energizing an ultraviolet lamp to ignite the mixture of captured hydrogen and chlorine gases.

6. The method of claim 1 , further comprising energizing an electrical spark generator to ignite the mixture of hydrogen and chlorine gases.

7. The method of claim 1 , further comprising initializing the water reservoir with seawater from the body of seawater.

8. The method of claim 1 , further comprising selecting a threshold volume of the solution of dissolved gases, and transferring said hydrochloric acid to said second depth when the hydrochloric acid reaches a threshold volume.

9. The method of claim 1 , further placing the electrolyzer and water reservoir within a buoyant, environmentally-powered vessel.

10. The method of claim 9 , further powering the buoyant environmentally-powered vessel with wind energy.

11. The method of claim 9 , further powering the buoyant environmentally-powered vessel with ocean wave energy.

12. The method of claim 9 , further powering the buoyant environmentally-powered vessel with thermal energy.

13. The method of claim 9 , further powering the buoyant environmentally-powered vessel with solar energy.

14. The method of claim 1 , further placing the electrolyzer and water reservoir within a terrestrial facility adjacent to the body of seawater.

15. The method of claim 14 , transmitting electrical energy converted from a wind energy to the electrolyzer.

16. The method of claim 14 , transmitting electrical energy converted from an ocean wave energy to the electrolyzer.

17. The method of claim 14 , transmitting electrical energy converted from a thermal energy to the electrolyzer.

18. The method of claim 14 , transmitting electrical energy converted from a solar energy to the electrolyzer.

19. The method of claim 1 , further transferring contents of the reservoir of hydrochloric acid solution to the second depth through an acid-resistant hose.

20. The method of claim 1 , further transferring contents of the reservoir of hydrochloric acid solution to the second depth with an autonomous undersea vessel.

21. The method of claim 1 , further transferring contents of the reservoir of hydrochloric acid solution to the second depth by freezing the hydrochloric acid solution and dropping the frozen hydrochloric acid solution into the body of water and allowing it to sink to a depth within that body of water.

Assignees

• Lone Gull Holdings Ltd

Inventors

• Sheldon-Coulson Garth Alexander
• Moffat Brian Lee

Classifications

• C02F1/4618

  for producing "ionised" acidic or basic water · CPC title

• C02F2201/4617

  DC only · CPC title

• C02F2201/46165

  Special power supply, e.g. solar energy or batteries · CPC title

• C02F1/4604

  for desalination of seawater or brackish water · CPC title

• C01B7/012 Primary

  Preparation of hydrogen chloride from the elements · CPC title