Corrosion control for supercritical carbon dioxide fluids

Patent metadata

Field	Value
Publication number	US-11142831-B2
Application number	US-202016810953-A
Country	US
Kind code	B2
Filing date	Mar 6, 2020
Priority date	Mar 8, 2019
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A method of preventing or mitigating corrosion on a metallic surface exposed to a supercritical fluid is disclosed. The method includes adding a corrosion inhibitor composition to a supercritical fluid comprising a supercritical carbon dioxide; and contacting the supercritical fluid with a metallic surface, wherein the corrosion inhibitor composition comprises a corrosion inhibitor that has a solubility of greater than 5,000 ppm in the supercritical fluid at 48.9° C. and 2,200 psi.

First claim

What is claimed is:

1. A method of preventing or mitigating corrosion on a metallic surface exposed to a supercritical fluid, the method comprising:
adding a corrosion inhibitor composition to a supercritical fluid comprising a supercritical carbon dioxide; and
contacting the supercritical fluid with a metallic surface,
wherein the corrosion inhibitor composition comprises a corrosion inhibitor that has a solubility of greater than 5,000 ppm in the supercritical fluid at 48.9° C. and 2,200 psi,
wherein the supercritical fluid is contacted with the metallic surface during a carbon dioxide capturing and sequestering operation.

2. The method of claim 1 , wherein the corrosion inhibitor has a solubility of greater than or equal to 10,000 ppm and less than 100,000 ppm in the supercritical fluid at 48.9° C. and 2,200 psi.

3. The method of claim 1 , wherein the supercritical carbon dioxide is present in an amount of greater than 90 vol % in the supercritical fluid, based on the total volume of the supercritical fluid.

4. The method of claim 1 , wherein the supercritical fluid further comprises water.

5. The method of claim 1 , wherein the supercritical fluid further comprises a component of natural gas, nitrogen, nitrogen dioxide, sulfur dioxide, oxygen, dimethyl ether, or a combination comprising at least one of the foregoing.

6. The method of claim 1 , wherein the corrosion inhibitor migrates to water condensed on the metallic surface.

7. The method of claim 1 , wherein the corrosion inhibitor comprises 2-mercaptoethanol, thioglycolic acid, or a combination comprising at least one of the foregoing.

8. The method of claim 1 , wherein the corrosion inhibitor composition further comprises a solvent, which is water, methanol, or a combination thereof.

9. The method of claim 1 , wherein the corrosion inhibitor is present in an amount of 10 to 95 vol % in the corrosion inhibitor composition, based on the total volume of the corrosion inhibitor composition.

10. The method of claim 1 , wherein the corrosion inhibitor composition is added to the supercritical fluid in an amount of 500 to 5,000 ppm based on the total volume of the supercritical fluid.

11. The method of claim 1 , wherein the metallic surface comprises iron, nickel, copper, aluminum, a carbide thereof, an alloy thereof, or a combination comprising at least one of the foregoing.

12. A method of preventing or mitigating corrosion on a metallic surface exposed to a supercritical fluid, the method comprising:
adding a corrosion inhibitor composition to a supercritical fluid comprising a supercritical carbon dioxide; and
contacting the supercritical fluid with a metallic surface,
wherein the corrosion inhibitor composition comprises a corrosion inhibitor that has a solubility of greater than 5,000 ppm in the supercritical fluid at 48.9° C. and 2,200 psi,
wherein the metallic surface comprises carbon steel.

13. The method of claim 1 , wherein the metallic surface has a corrosion rate of less than 0.15 millimeter/year.

14. The method of claim 12 , wherein the supercritical fluid is contacted with the metallic surface during a carbon dioxide capturing and sequestering operation.

15. A method of preventing or mitigating corrosion on a metallic surface exposed to a supercritical fluid, the method comprising:
adding a corrosion inhibitor composition to a supercritical fluid comprising a supercritical carbon dioxide; and
contacting the supercritical fluid with a metallic surface,
wherein the corrosion inhibitor composition comprises a corrosion inhibitor that has a solubility of greater than 5,000 ppm in the supercritical fluid at 48.9° C. and 2,200 psi, and
wherein the corrosion inhibitor composition is added to a pipeline originating from a carbon dioxide capture facility, an injection well tubular, or a combination thereof.

16. The method of claim 15 , wherein the supercritical carbon dioxide is present in an amount of greater than 90 vol % in the supercritical fluid, based on the total volume of the supercritical fluid.

17. The method of claim 15 , wherein the supercritical fluid further comprises water.

18. The method of claim 15 , wherein the supercritical fluid further comprises a component of natural gas, nitrogen, nitrogen dioxide, sulfur dioxide, oxygen, dimethyl ether, or a combination comprising at least one of the foregoing.

19. The method of claim 15 , wherein the corrosion inhibitor migrates to water condensed on the metallic surface.

20. The method of claim 15 , wherein the corrosion inhibitor comprises 2-mercaptoethanol, thioglycolic acid, or a combination comprising at least one of the foregoing.

21. The method of claim 15 , wherein the corrosion inhibitor composition further comprises a solvent, which is water, methanol, or a combination thereof.

22. The method of claim 15 , wherein the corrosion inhibitor is present in an amount of 10 to 95 vol % in the corrosion inhibitor composition, based on the total volume of the corrosion inhibitor composition.

23. The method of claim 15 , wherein the corrosion inhibitor composition is added to the supercritical fluid in an amount of 500 to 5,000 ppm based on the total volume of the supercritical fluid.

Assignees

• Jackson Tracey
• Ramachandran Sunder
• Liu Zhengwei
• Stewart Ayala Jonathan
• Baker Hughes Oilfield Operations Llc

Inventors

• Jackson Tracey
• Ramachandran Sunder
• Liu Zhengwei
• Stewart-Ayala Jonathan

Classifications

• Y02P20/54

  using solvents, e.g. supercritical solvents or ionic liquids · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title

• C09K8/54

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C23F11/141

  Amines; Quaternary ammonium compounds · CPC title

• C23F11/02

  in air or gases by adding vapour phase inhibitors · CPC title